10 Questions You Should to Know about 2d Desktop Barcode Scanner

Barcodes and barcode scanners are an integral part of our daily life and any high-performing business. Scanning systems play a key role across a myriad of industries such as healthcare, manufacturing, travel, retail, grocery, and government. Barcodes have made business more efficient for companies, providing an essential method to track and store information about millions of items. But information is power in every aspect of your life, so to really benefit from these products, it’s important to choose the right one for your business needs.

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1. What are barcode scanners?
2. What is the difference between a 1D and 2D barcode?
3. What information is represented by 1D and 2D barcodes?
4. What is the difference between 1D laser and 2D imager barcode scanners?
5. What are the common applications for 1D and 2D barcodes?
6. Can barcode scanners read through tape?
7. Can barcode scanners read QR codes?
8. Can barcode scanners read all barcodes?
9. Can barcode scanners read screens?
10. Can a scanner read barcodes from any angle?
11. Where are barcode scanners used?
12. Where are barcode scanners purchased?
13. Why won't my barcode scanner work?
14. Can barcode scanners read any color?
15. I have small barcodes – is that a problem?
16. Are all barcode scanners laser scanners?
17. I want a durable barcode scanner – what do you recommend?
18. What are the different types of wireless barcode scanners?
19. Can mobile computers be used to scan barcodes?
20. What is the number one thing that impacts barcode readability?
21. Are barcode scanners able to collect information beyond barcodes?

1. What are barcode scanners?

When you think about barcode scanners, you imagine a small device that can help you read those lines you see on a label, but the mechanism is more complex. These are tools that are specifically designed not only to capture the image of a barcode, but also to decode the information and to transmit that data to a computer. This transmission is sent through wired or wireless connections depending on the model of the scanner.

Another way to put it, a barcode scanner enters data just like you would with a keyboard, but much faster. Rather than typing the number, which can leave room for human error, the scanner simply adds information to a database or your business application.

2. What is the difference between a 1D and 2D barcode?

When most individuals think of barcodes, they picture a horizontal linear code made up of variable-width lines and spaces spread from left to right as ubiquitously seen on consumer goods. This is a 1D (one-dimensional) barcode. This group of lines and spaces, bounded by unprinted areas on either end (the “quiet zone”), represents the information the scanner will read.

The most recognizable 1D barcode is the 12-digit UPC number. The first six numbers are the manufacturer identification number, the next five digits represent the item’s number, and the final number is referred to as the check digit which is used to help the scanner determine if the code was read correctly.

A single 1D barcode line typically contains between 8–25 characters of text information. When you see multiple layers of bars and spaces, this is referred to as stacking, which allows the user to extend beyond the 25 characters. Many businesses have settled on using 8–15 characters, which keeps the barcode at a respectable and printable size.

Unlike the 1D barcode that is read horizontally, the 2D (two-dimensional) barcode, looking like a square or rectangle, stores information both horizontally and vertically, thus it is read in two dimensions (INTSERT IMAGE). The 2D code uses patterns of squares, hexagons, dots, and other shapes to encode data. This dramatically increases the amount of information that can be represented by the barcode: This little shape can hold over 4,000 characters and 7,000 digits while still appearing physically smaller. An example of a 2D barcode would be a QR or Data Matrix code. 2D barcodes remain legible when printed at a small size or etched onto a product. 2D barcodes have nearly a 100% read rate from any angle, even if slightly damaged, due to redundant data and error correction technology.

A 2D barcode encodes alphanumeric information as well as images, website addresses, voice, and other types of binary data. You can use the information whether you are connected to a database or not.

3. What information is represented by 1D and 2D barcodes?

Barcodes are a low-cost method of helping businesses track large amounts of information. When a 1D barcode is decoded, it translates into alphanumeric digits (i.e., numbers and letters), which represent a kind of “license plate” for a specific item. When this information is sent to the computer database, the information can then be associated with data specific to the item such as price, number of items in stock, item description, and item image.

A 2D barcode encodes alphanumeric information as well as images, pricing, website addresses, voice, and other types of binary data.

4. What is the difference between 1D laser and 2D imager barcode scanners?

Laser barcode scanners were the original 1D barcode scanner. The scanner directs a red beam of light toward a horizontal variable-width row of black and white lines and spaces. This beam of light is directed back and forth by a rotating mirror or prism. The light reflects off the barcode into a light-detecting electronic component called a photoelectric cell. The white areas of the barcode reflect the most light and black the least light. The scanner detects the width and sequence of black and white stripes and converts them into decimal numbers. Historically laser barcode scanners are eventually prone to failure due to the moving parts. Laser scanners can only read linear barcode symbologies such as Code 39, Code 128, UPC, and others. Standard laser scanners can read from a few inches to a few feet depending on the barcode. Extended range laser barcode scanners can read over 30 feet when using reflective labels.

The 2D imager barcode scanner functions like a digital camera. These scanners can read both 1D and 2D barcodes. Rather than using a laser, the imager barcode scanner takes a picture and uses a decoding algorithm to locate the barcode within that image and then decode the data from that barcode within that image. Unlike a laser scanner, the imager does not require the barcode to be oriented in a specific way to be read. Most barcode scanners today are camera-based. 2D imagers can read barcodes off any surface including smartphones.

5. What are the common applications for 1D and 2D barcodes?

1D barcodes are commonly used for consumer goods and usually represent 8–15 alphanumeric digits. They are best used for identifying items where associated information may change frequently. For example, an item associated with a UPC code may not change, but the price does. The code represents a static item in a database that can have a pricing change. This is a better option than encoding the price into the barcode. These codes can be read by laser and imager scanners.

2D barcodes allow companies to encode more product information, making it easier to track more data on items as they move through the supply chain. These devices are used in a wide variety of industries from manufacturing and warehousing to logistics and healthcare. Because of their high data density, 2D codes can be used on very small items where 1D codes would be impractical. For example, 2D barcodes are used by hospitals to ensure patients get the right medications on the right schedule, and by sales and marketing teams to embed links to websites, videos, brochures, and more.

6. Can barcode scanners read through tape?

Yes, barcode scanners can read through tape. Tape can create a glare that can cause the barcode to be hard to read, just like the glare of the sun can make it hard for you to see an object. By simply changing or tipping the scanner a few degrees, your scanner will be able to read the barcode.

7. Can barcode scanners read QR codes?

QR codes belong to the family of 2D barcodes. Rather than being a series of bars that track from right to left, 2D barcodes consist of black squares and dots that represent different pieces of information. You will need a 2D image barcode scanner to take a picture of the entire image at one time, which is then analyzed through a decoding algorithm to define the information contained in the QR code. With a 2D barcode scanner, you can read other common 2D symbologies such as Data Matrix and Aztec code.

8. Can barcode scanners read all barcodes?

There are two classes of barcodes: 1D and 2D. 1D codes, such as the UPC code, are usually variable-width black and white spaces. 2D codes, such as QR codes and Data Matrix, use squares, hexagons, and other shapes to store data.

Not all barcode scanners can read all barcodes. Laser barcode scanners and linear imagers read only 1D barcode scanners. Imager (camera-based) 2D barcode scanners read all common 1D and 2D barcodes.

9. Can barcode scanners read screens?

With the advent of shopper loyalty programs, being able to read barcodes on phones has become very important in retail settings. In order to read a barcode on a screen, you will need a 2D barcode imaging scanner. Reading barcodes on a can be challenging for scanners to read because of screen polarization, levels of brightness, surface gloss, and reflectiveness. Honeywell has put extensive effort into designing technology that allows our 2D barcode scanners to read screens.

10. Can a scanner read barcodes from any angle?

1D barcode scanners can only read 1D barcodes in a very limited angle that is perpendicular to the horizontal variation of white and black bars. 2D image scanners have the benefit of being able to read 1D and 2D codes from any angle.

11. Where are barcode scanners used?

Barcode scanners are used in almost every conceivable industry and application around the world. For example, these devices are used in:

• Retail for point-of-sale transactions, marketing/customer loyalty programs, inventory, warehouse operations, transportation, and more.
• Healthcare for patient admissions, bedside medication verification, lab specimen track and trace, shipping and receiving, documents and records tracking, and staff communication.
• Manufacturing for inventory management, work in progress, asset tracking, shipping and receiving, and compliance labeling.
• Warehouse distribution to automate and optimize workflow functions such as picking, put-away, stock replenishment, shipping, and receiving.
• Transportation and logistics to help track every item throughout the supply chain such as cross-docking, fleet management, and pick-up and delivery operations.
• Grocery for point-of-sale transactions and inventory to warehouse operations and transportation.
• Food processing from the manufacturing floor to packaging and distribution. The industry has constantly growing track and trace requirements for food safety. Companies in the food industry must be able to identify when, where, and by whom produce was received, processed, stored, transported, consumed, and disposed of and provide documented proof.
• Field service applications to take readings for utility companies, conduct building, machinery, and vending machine inspections, capture and transmit electronic signatures, manage inventory, and more.
• Education for tracking assets, attendance, registration, documents, and records tracking and staff communication.
• Postal and parcel delivery services scan all barcoded mail pieces (flats, letters, and packages) that enter the mail stream and track those items with additional scans up to the point of delivery. Scanning accuracy is critically important to the success of real-time visibility.
• Ecommerce for order fulfillment, marketing efforts, packing/shipping, transportation, inventory, warehouse operations, and more.
• Military for tracking equipment and supplies, ID management, supply chain and logistics, commissary management, maintenance and repair, and more.

12. Where are barcode scanners purchased?

You can purchase barcode scanners from Honeywell, distributors, partners, and retail outlets around the world.

13. Why won't my barcode scanner work?

There could be a number of reasons why a barcode will not scan. The most common causes of unreadable barcodes are as follows:

• Low contrast. In order for a scanner to extract information from a 1D or 2D barcode, the scanner needs to be able to tell the differences between the light and dark elements of the symbol. Low contrast can be a cause because the barcode is printed on a highly reflective surface that blinds the scanner, or the printing ink is not evenly applied/distributed across the code.
• Quiet zone violations. Quiet zones are the areas surrounding the 1D barcode or 2D symbol. This space allows the scanner to clearly see the entire code and separates it from surrounding marks. For 1D barcodes, the quiet zone is the left and right ends of the code. It is usually 10 times the width of narrowest bar. The quite zone for the 2D symbol is the space surrounding the entire symbol, which is usually 10% of the symbol’s height or width. If text or markings enter these quiet zones, the decoding algorithm may try to interpret these elements as part of the barcode or symbol or may have difficulty locating the symbol.
• Improper reading position. Sometimes no-read results from the physical position of the scanner. Barcode scanners have minimum/maximum distances that allow the scanner to adequately focus the code/symbol clearly. If you are too close or too far away for your scanner’s optical range, you will have a no-read. The angle of the scanner can cause non-reads. Sometimes the light on the barcode/symbol essentially blinds the reader. By simply tilting the scanner, you can get a clear image. The scanner could also be trying to read a code/symbol in a rotation that is not accommodated by the scanner. For example, laser scanners must be oriented to be able to scan the 1D barcode from a horizontal position.
• Print or mark inconsistency. This can be caused by poor distribution of ink for the printed codes, uneven pressure in the device applying the code/symbol, or the surface absorbing the ink, which can cause low contrast and quiet zone violations.
• Damage or distortion. Barcode/symbol quality may degrade as surfaces are exposed to different environmental factors that can create minor scratches, stain/blotch, tear, and/or remove codes. For example, humidity on waterborne print can cause water to form on a code, which can cause the ink to blotch. A 2D symbol may receive fixed pattern damage to its “finder pattern” that does not allow the reader to interpret the symbol’s orientation and number of rows and columns for decoding. This can be caused by a scratch, tear, stain, or even debris.
• Scanner settings. Many scanners provide the user the ability to adjust the settings for use. For example, if a 2D scanner is not reading a QR code, it could be as simple as the scanner does not have QR turned on allowing it to read the code. Or you have a scanner that is set to read a medium-density code and you are trying to read a high-density code.
• The barcode print quality is too poor. The following issues related to the barcode quality are some of the more common:
  • Use of a certain background color (bad contrast between bars and spaces).
  • Use of a certain color or faint black color for the bars (bad contrast between bars and spaces).
  • The barcode does not allow adequate space to the left or right of the code on the label (inadequate quiet zone).
  • Missing a portion of the barcode/not enough elements (the visible bars and spaces do not create the correct code).
  • The bar-width and/or space-width is incorrect or inconsistent throughout the symbol (dimensional errors).

14. Can barcode scanners read any color?

Barcode scanners cannot read all colors or color combinations. The main reason why barcodes can be hard to scan is, as we said before, the lack of contrast between the background and bar colors. Black, dark blue, dark green, and dark brown work well for barcode print, but not label backgrounds. The best combination barcode labels include:

• Black and white, red or yellow
• Blue and white, red or yellow
• Green and white, red or yellow

Color combinations to avoid include:

• Red and white
• Light brown and white
• Yellow and white
• Red and green
• Red and brown
• Red and blue
• Black and green
• Black and brown
• Black and blue

15. I have small barcodes – is that a problem?

Each scanner will have a minimum resolution for cell-sized specification. If your barcode minimum X dimension for cell size is smaller than can be read by your scanner, then that could be problem. Additionally, if you are creating labels as part of the compliance program that must be read elsewhere in the supply chain, then ensuring that your barcodes meet the specifications required by your downstream recipients would also be an important element to validate.

In a linear 1D barcode (such as a Code 128 or UPC), the X-dimension refers to the width of the narrowest bar in the symbol. In a 2D symbol (such as a Data Matrix or QR Code), the X-dimension refers to the height and width measurement of one cell (square element).

16. Are all barcode scanners laser scanners?

No. Laser barcode scanners were the original 1D barcode scanner. They were fast and efficient but were limited to reading 1D barcodes (e.g., Code 39, Code 128, UPC) and were historically prone to failure due to the moving parts.

Many of the barcode scanners today are 2D imager barcode scanners. It is a camera-based scanner and functions like a digital camera. These scanners can read both 1D and 2D barcodes. Rather than using a laser, the imager barcode scanner takes a picture and uses a decoding algorithm to locate the barcode within that image and then decode the data from that barcode within that image. Unlike a laser scanner, the imager does not require the barcode to be oriented in a specific way to be read. Most barcode scanners today are camera-based. 2D imagers can read barcodes off any surface including smartphones. The Honeywell Granit™ family of barcode scanners is a good example of 2D imager scanners.

17. I want a durable barcode scanner – what do you recommend?

Consider the Honeywell Granit or wearable barcode scanner families. With any serious decision about investing in handheld barcode scanner devices for your various workflows, you need to define your business requirements. For example, warehouses may incorporate several types of barcode scanners than can include ruggedized for dock and outdoor use, scanners for freezer conditions, and scanners for high-volume picking/inventory. You may need to address issues related to low lighting or applications requiring wireless models. The following are some of the key questions that you need to ask to help narrow your focus:

• In what conditions will you be scanning (e.g., indoors or outdoors)? Consider the workflow and the environmental stresses the barcode scanner will encounter such as dust, cold/heat, water, or environmental hazards. You will be looking at durability ratings for drop/impact, focal point distance of barcodes, wireless/corded capture method, and more. Consider the issue of impact and the common breakage of the scan glass. At Honeywell, we designed the Granit series barcode scanners with scan glass that is twice as far back and smaller than competitive models, which has made it almost resistant to damage.
• What are the variety of 1D/2D symbologies you will be scanning? Many industries differ in the barcode symbologies they have adopted. The adoption is based on its implementation, the data that will be encoded, and how the barcode will be printed. Each barcode symbology has a standard that defines how the barcode scanner reads and decodes the symbol. For example, if you are reading UPC or “license-plate” style barcodes, then a laser scanner or linear imager scanner may be the answer. If you are already scanning 2D codes or may need to scan them in the future, then you need a 2D imaging barcode scanner that can read either 1D or 2D.
• What is the frequency of use? Will you be scanning one item at a time in a picking workflow or thousands of times per minute on a conveyor system?
• What are the common distances you will be scanning? Are you doing arm's-length scanning where you’re scanning from a few inches to several feet away, or are you doing full-range scanning from six inches to 50 feet away?
• What are the power requirements? If you are a company with field operations, you may have workers that are in the field for 8+ hours. If you are in a warehouse, the scanner may only need a battery life of a few hours. Or you may be in a retail environment that has different requirements. For example, the Honeywell Xenon™ and Voyager™ family of scanners include battery-free technology. When fully charged, they can scan over 450 UPC/EAN codes without the need for recharging – enough to check out at least 25 customers during peak periods. A 20-second charge will deliver 100 scans or a full charge in under 2 minutes, and effectively eliminates the cost of battery replacement.

• How mobile are your workers and do they need to scan items that are dispersed? This question helps to define whether you should use a corded or wireless barcode scanner.

  For example, in the Honeywell Granit family of barcode scanners, you have corded versions that connect to the host device such as a PC or forklift vehicle-mounted computer. Cordless versions communicate wirelessly with the communication base or when docked with the base. The worker is free to operate without a cord dangling across the work surface. Some versions give the worker the ability to roam and scan, and when the scanner is in range of the base it will download scanned data.

  And then there are the Honeywell wearable devices, the and i. The  can be either a two-piece scanner that has a small scan head that sits on top of the index finger of the user and has a cable that connects to the wrist-worn Bluetooth® unit; or it can be paired with another device such as a mobile computer, fixed workstation, or vehicle-mounted computer. It effectively operates as direct data entry to the secondary device.

  The i is designed to be a simpler form factor than the . It’s a one-piece that has two ergonomic versions: one is a two finger–triggered ring and the other goes on a strap glove. The i is available in a Standard version, which basically provides standard Bluetooth scan and data entry. And then there is an Advanced version that has customizable workflow instructions on the user-facing display and Wi-Fi access, so you can communicate directly with the network application rather than needing a paired mobile device or workstation computer.

18. What are the different types of wireless barcode scanners?

There are essentially two types of wireless barcode scanners: handheld and wearable. For example, in the Honeywell Granit family of barcode scanners, the i cordless version communicates wirelessly through the communication base or when docked with the base. The worker is free to operate without a cord dangling across the work surface. Workers can roam and scan; when the scanner is in range of the base it will download its scanned data. These area-imaging scanners are for businesses where arm's length 1D and 2D barcode scanning in harsh, unpredictable environments is the norm.

And then there are the Honeywell wearable devices, the and i. The  can be either a two-piece scanner that has a small scan head that sits on top of the index finger of the user and has a cable that connects to the wrist-worn unit or is a Bluetooth wearable ring scanner, so you pair it with another device such as a mobile computer, fixed workstation, or vehicle-mounted computer. It effectively operates as direct data entry to the secondary device.

The i is a different, simpler form factor than the . It’s a one piece that has two ergonomic versions: one is a two finger–triggered ring and the other goes on a strap glove. The i is available in the Standard version that basically provides standard Bluetooth scan and data entry. And then there is an Advanced version that has customizable workflow instructions on the user-facing display and Wi-Fi access so you can communicate directly with the network application rather than needing a paired mobile device or workstation computer.

19. Can mobile computers be used to scan barcodes?

Yes. Mobile computers like Honeywell’s CT40 and CT60 are equipped with a high-performance barcode scanner. They can do much more than scan. They have the ability to run multiple business applications such as inventory and asset tracking. Mobile computers have rugged designs that make them extremely durable and weather-resistant. This type of device is suited for almost any work environment. For workers in the field or rough industrial areas, the scanner can be used to view, edit, and adjust orders and data in the system. In retail settings, workers can quickly look up stock locations, make adjustments, place orders, and perform other tasks straight from their scanning device.

20. What is the number one thing that impacts barcode readability?

Label quality – a barcode is only as reliable as the application that it is printed on. If a label falls off or the ink smudges, your barcode is essentially useless. Choosing the right label and label printer can make all the difference. Label printers are best for printing barcodes and shipping labels. They come in three types, which include industrial, desktop, and mobile. Honeywell has a complete line of label printers to support every application and environment.

21. Are barcode scanners able to collect information beyond barcodes?

Honeywell is beginning to include Operational Intelligence in many of its barcode scanners. Operational Intelligence collects information such as scanned barcode volume, which can be a proxy for site productivity. In the warehouse it can define the throughput of packages. In retail it can denote how your sales are doing. It can also denote if specific barcodes are becoming hard to read and much more.

Barcodes are ubiquitous—in grocery stores, warehouses, libraries, and hospitals. But have you ever wondered how those black-and-white lines turn into useful information? The answer lies in barcode scanners—small yet powerful devices that help businesses track products, speed up checkouts, and reduce errors.

If you've ever asked, "What is a barcode scanner, and how does it work?"—you're in the right place. In this article, we'll explain it simply so everyone can understand. Let's start!

What Is a Barcode Scanner?

A barcode scanner (or reader) reads and decodes barcodes. It captures the black-and-white pattern on a barcode, translates it into numbers or text, and sends that data to a computer, POS system, or inventory management software.

Barcode scanners are used widely in retail, logistics, healthcare, and warehouses for tracking products and automating tasks. Without barcode scanners, businesses would have to manually type product codes, which is slow and prone to errors.

Common Uses of Barcode Scanners:

• Retail stores: Scan items at checkout for faster transactions.
• Warehouses: Monitor inventory, minimize errors.
• Healthcare: Scan wristbands for precise medication.
• Logistics: Manage shipments, track packages, and update records instantly.

How Does a Barcode Scanner Work? (Step-by-Step)

Barcode scanning may seem like magic, but it’s actually a simple process based on light and sensors. Whether you’re scanning a traditional 1D barcode or a 2D QR code, most scanners follow a similar basic principle. Here’s how it works:

General Barcode Scanner Workflow

Step 1: The Scanner Emits Light
Barcode scanners typically emit light using either a laser or LED to scan the code, whether it's a 1D or 2D barcode.

Step 2: The Barcode Reflects Light
The barcode reflects the light back to the scanner, with white areas reflecting more light and black areas absorbing it. This difference helps the scanner identify the code’s structure.

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Step 3: The Scanner Captures the Pattern or Image

• For 1D barcodes, the scanner detects light variations caused by the bars and spaces.
• For 2D barcodes, the scanner captures an image of the full code using a camera-like sensor.

Step 4: The Decoder Translates the Data
The scanner’s decoder interprets the pattern or image, translating the captured data into a readable format like numbers, text, or a URL.
Step 5: Data Transmission
The decoded data is sent to a connected device or system (like a POS system or database) for processing.

How Does a 1D Barcode Scanner Work?

1D barcode scanners use light to detect a series of black bars and white spaces that represent numbers and letters in a barcode. Here’s a breakdown of the process:

Light Emission: The scanner shines a red LED or laser light onto the barcode.

Reflection: White areas of the barcode reflect the light back to the scanner, while black bars absorb the light, creating a contrast pattern.

Light Detection: The scanner detects variations in the reflected light, analyzing the width of the black and white bars.

Data Decoding: The reflected light is converted into a digital signal, which is decoded into a number or text.

Transmission: The decoded information is transmitted to the connected system for use.

How Does a 2D Barcode Scanner Work?

2D barcode scanners, like those used for QR codes, are more advanced. Here’s how they operate:

Image Capture: A 2D scanner uses an image sensor to capture an entire image of the barcode. It can use ambient light or its built-in light source.

Reflection: The light reflects off the barcode, and the sensor detects the varying light patterns.

Pattern Analysis: The scanner analyzes the captured image, interpreting the multi-dimensional code that contains more complex data.

Data Decoding: The captured data is decoded from the image into readable information, such as a website URL or other stored data.

Transmission: The decoded information is transmitted to the connected system for processing.

Key Differences Between 1D and 2D Scanners

Related Reading: How Does a Scanner Work? A Simple Guide for Everyone

Key Components of a Barcode Scanner: What Makes It Work?

A barcode scanner may look simple on the outside, but inside, it’s made up of several key components that work together to capture, decode, and transmit barcode data accurately. Let’s take a closer look at the essential parts of a barcode scanner and how they contribute to its functionality.

Light Source – Illuminating the Barcode

Every barcode scanner requires a light source to read the information encoded in the barcode. The light illuminates the barcode, allowing the scanner to detect the contrast between black bars and white spaces. The light source varies depending on the scanner type:

• Laser and CCD Scanners: These scanners emit a red LED or laser light to illuminate the barcode. The light reflects off the barcode, and the scanner detects the contrast. CCD scanners use multiple sensors to capture the reflected light, offering higher accuracy.
• 2D Barcode Scanners: 2D scanners, such as those used for QR codes, capture the entire barcode as an image. They don’t require a dedicated light source if the environment is well-lit, although laser positioning is used for long-distance scanning to ensure precise targeting.
• Industrial Scanners: Industrial-grade barcode scanners often avoid lasers due to their fragility. Instead, they use more durable CCD systems designed to withstand impacts and vibrations, making them ideal for high-impact environments.

Lens – Capturing the Image

The lens is responsible for focusing the light reflected from the barcode onto the scanner’s sensor, ensuring the image is sharp and clear for accurate reading.

• Laser and CCD Scanners: The lens focuses reflected light from the barcode and directs it to the sensor, ensuring the image is captured with high clarity.
• 2D Scanners: For 2D barcode scanners, the lens captures the full image of the barcode. This is crucial for decoding more complex barcodes, such as QR codes or Data Matrix codes, where precision is key.

Sensor  – Detecting the Barcode

• The sensor reads reflected light, converting it to an electrical signal.
• Different scanners use different types of sensors:
  • Laser scanners use photodiodes.
  • CCD scanners utilize an array of small light sensors.
  • 2D image scanners use camera-based sensors to capture an entire barcode in one go.

Decoder – Converting Data into Readable Formats for Software

• The decoder processes the sensor's signal, translating it into alphanumeric characters.
• Some scanners have built-in decoders, while others send raw data to an external decoder.
• It identifies the barcode format (UPC, QR code, Code 128, etc.) and ensures accurate interpretation.

Communication Interface  – Transmitting the Data

• Once decoded, the barcode data needs to be sent to a computer, POS system, or inventory software.
• Barcode scanners use different communication methods:
  • USB or Serial (RS232) – Direct wired connection.
  • Bluetooth – Wireless transmission for mobile scanning.
  • Wi-Fi – Used for network-connected scanners.

Trigger Mechanism  – Activating the Scan

• Many handheld scanners have a trigger button that users press to start scanning.
• Some scanners (like presentation or industrial scanners) have auto-sensing features that detect a barcode when placed in front of them.

Power Supply  – Keeping the Scanner Running

• Wired barcode scanners draw power from the connected device (USB, POS terminal, etc.).
• Wireless scanners have rechargeable batteries with power-saving features for long life.

Housing & Durability Features  – Protecting the Components

• Retail barcode scanners have lightweight plastic casings for regular indoor use.
• Industrial scanners come with IP-rated rugged casings that are waterproof, dustproof, and impact-resistant for harsh environments.
• Some models, like Tera’s DPM Pro, feature enhanced drop resistance (up to 9.84 feet) for added durability.

Each part of a barcode scanner plays a crucial role in ensuring fast, accurate, and reliable barcode reading. Whether you need a simple scanner for retail checkout or an industrial-grade scanner for warehouses, understanding these components helps you choose the right scanner for your needs.

Types of Barcode Scanners & Their Uses

Barcode scanners come in different forms, designed for specific tasks and industries. Here's a quick breakdown:

By Physical Design

Handheld Scanners – Most common; available in wired (USB) and wireless (Bluetooth, RF) versions. Ideal for retail, warehouses, and healthcare.
Mobile Computer Scanners (PDA Scanners) – Combines a scanner with a built-in OS for real-time inventory management and logistics.
Presentation (Hands-Free) Scanners – Used in supermarkets and POS systems for quick, automatic scanning.
Industrial & Rugged Scanners – Durable, shockproof, waterproof; used in factories and outdoor environments.
Wearable Scanners – Hands-free scanning for warehouses and order fulfillment.
Fixed-Mount Scanners – Permanently installed in assembly lines and conveyor belts for high-speed scanning.

By Scanning Technology

Laser Scanners – Laser scanners emit a laser beam to read 1D barcodes from a distance. The laser reflects off the barcode and is detected by the scanner, enabling fast and accurate scanning. However, laser scanners cannot scan barcodes displayed on electronic screens.

CCD (LED) Scanners – CCD scanners use a grid of light sensors to detect reflected light from a barcode. This technology enables CCD scanners to read 1D barcodes, including those displayed on electronic screens. While slightly slower than laser scanners, CCD scanners offer high durability due to the lack of moving parts.

2D Image Scanners – 2D scanners use an image sensor to capture and decode both 1D and 2D barcodes, such as QR codes. These scanners rely on digital imaging to process barcodes, allowing for scanning of complex patterns that are not possible with traditional 1D scanners.

Omnidirectional Scanners – Omnidirectional scanners use multiple laser beams or LEDs arranged in a way that allows them to scan from multiple angles simultaneously. This enables the scanner to capture a barcode from any direction, improving scanning efficiency.

RFID & Hybrid Scanners – These scanners integrate both barcode reading and RFID technology. RFID scanners use radio waves to read RFID tags, while the barcode component uses light-based scanning. Hybrid scanners allow for the simultaneous processing of both technologies, enabling more versatile data capture.

By Connectivity

Wired Scanners – Reliable USB, RS232, PS/2 connections.
Wireless Scanners – Bluetooth, 2.4GHz RF, Wi-Fi for cordless scanning.

Choosing the Right Scanner

• Retail & POS → Handheld, presentation, or POS scanners
• Warehouses & Logistics → Rugged, mobile computer, or wearable scanners
• Manufacturing → Fixed-mount or omnidirectional scanners
• Healthcare → 2D image scanners for wristbands & medication tracking

Advantages of Barcode Scanners: Why Businesses Need Them

Barcode scanners do more than just speed up checkout—they transform how businesses track inventory, process sales, and reduce costs. Here’s why they are essential:

Faster & More Efficient Operations

• Scanning a barcode is quick, cutting checkout time and speeding inventory.
• Eliminates the need for manual product entry, which is slow and error-prone.

Enhanced Accuracy & Error Reduction

• Manually entering product codes leads to errors—barcode scanning eliminates this issue.
• Improves inventory tracking, reducing miscounts and misplaced items.

Real-Time Data for Smarter Decisions

• Automatically updates inventory, sales records, and shipments, giving businesses real-time insights.
• Helps avoid stockouts and overstocking, leading to better supply chain management.

Cost Savings & Increased Productivity

• Reduces labor costs by eliminating manual data entry.
• Streamlines inventory audits, reducing shrinkage and lost inventory.

Better Customer Experience

• Quick checkouts mean shorter lines and happier customers.
• Barcode systems enable easy discounts and loyalty program management.

1D Barcode Scanner vs. 2D Barcode Scanner: What’s the Difference?

1D and 2D barcode scanners have different functionalities and applications. While 1D scanners read linear barcodes, 2D scanners can decode more complex matrix barcodes.

1D Barcode Scanners

1D barcode scanners are designed to read traditional linear barcodes, such as UPC and EAN codes. These barcodes store limited data, typically a few digits or characters.

• Laser Scanners use a laser beam to scan the barcode, suitable for longer-distance scanning but cannot read barcodes on electronic screens.
• CCD Scanners use multiple light sensors to capture reflected light. They are slower than laser scanners but can read barcodes displayed on electronic screens and are more durable.

2D Barcode Scanners

2D barcode scanners are designed to read matrix barcodes, such as QR codes, Data Matrix, and Aztec codes. Unlike 1D barcodes, 2D barcodes store data in both horizontal and vertical directions, allowing for much higher data capacity.

2D scanners use image sensors or cameras to capture the full image of the barcode, decoding complex 2D information like text, links, and images. These scanners are more versatile than 1D scanners and can handle a broader range of data.

Key Differences

1D barcode scanners are best for quickly scanning simple linear barcodes, while 2D barcode scanners can handle more types of barcodes, store more data, and support more complex applications like digital payments and marketing.

Selecting the Right Barcode Scanner for Your Needs

Not all barcode scanners are alike. Choosing the right one depends on your needs. Ask these questions before buying.

Where will you use it? (Retail, warehouse, logistics, healthcare?)
Do you need a wired or wireless model? (USB, Bluetooth, or 2.4G RF?)
Will you scan 1D or 2D barcodes? (UPC, EAN, QR codes, Data Matrix?)
Do you need an industrial-grade scanner? (Dustproof, waterproof, impact-resistant?)

Once you've answered these questions, it's time to choose a reliable brand. Tera is a trusted name in barcode scanning technology, offering a range of high-performance scanners for different industries.

Top Tera Barcode Scanners for Your Business

Tera DPM Pro – Ultimate Industrial Barcode Scanner
Supports DPM (Direct Part Marking) scanning—perfect for manufacturing, aerospace, and automotive industries.
High-Precision 1-Megapixel Sensor—reads barcodes as small as 3 mil (0.003 inches), making it ideal for tiny, damaged, or worn codes.
IP67-Rated Waterproof & Dustproof—built for tough environments like factories and warehouses.
3-in-1 Connectivity—Bluetooth, 2.4G wireless, and USB for seamless data transfer.

Tera HW UHF RFID Scanner – Advanced RFID & Barcode Scanning
Dual Scanning Capabilities—reads both 1D/2D barcodes and UHF RFID tags.
Wireless Long-Range Scanning—2.4GHz RF technology allows scanning up to 100 meters in open spaces.
mAh Battery with Charging Cradle—ensures extended scanning time for inventory tracking, logistics, and retail applications.
High-Performance Global Shutter Sensor—accurately reads blurry, damaged, or low-contrast barcodes.

Why Choose Tera?

Trusted Worldwide – Used in industries like retail, logistics, manufacturing, and healthcare.
Durability & Precision – Built to handle high-volume scanning with minimal errors.
Versatile & Future-Proof – Supports both traditional barcodes and modern QR codes.

Searching for the ideal barcode scanner for your business?
Tera’s barcode scanners deliver the perfect blend of speed, accuracy, and durability—ensuring seamless operations in any industry!

The Future of Barcode Technology: What’s Next?

Barcode scanning is evolving rapidly, bringing more efficiency and convenience to businesses. Here are the main trends influencing its future:

RFID Integration – Smarter Inventory Tracking

RFID (Radio Frequency Identification) is enhancing traditional barcode systems by allowing faster, contactless scanning. Unlike standard barcodes, RFID doesn't need direct sight and scans multiple items simultaneously. This is particularly useful for warehouses, logistics, and retail where speed and accuracy are critical.

Smartphone-Based Barcode Scanning – A Cashier-Free Future?

With mobile barcode scanning, customers and employees can use smartphone cameras to scan items, reducing the need for bulky scanners. This trend is driving self-checkout systems and enhancing in-store shopping experiences.

Cloud-Based Barcode Systems – Instant Data Access

More businesses are adopting cloud-based barcode scanning solutions to store and manage data in real time. This allows for:
Remote inventory tracking
Faster order processing
Seamless integration across multiple locations

As barcode technology advances, businesses that invest in modern scanning solutions like Tera’s high-performance barcode scanners will gain a competitive edge in efficiency and accuracy.

Final Thoughts: Why Barcode Scanners Matter

Barcode scanners are essential tools for businesses big and small. They save time, reduce errors, and make inventory management effortless. Whether you're a store owner, warehouse manager, or medical professional, choosing the right barcode scanner can boost efficiency and accuracy.

If you need a reliable scanner, Tera's barcode scanners offer high performance, durability, and advanced scanning technology.

The company is the world’s best Automatic Image Sensing Barcode Scanner supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.