In-depth Review: DENSO AT21Q-SM vs. AT21Q-HM – Industrial-Grade Hybrid 2D Barcode Scanners

The DENSO AT21Q-SM and AT21Q-HM are high-performance handheld 2D barcode scanners capable of reading a wide variety of code formats, including rMQR codes, as well as codes displayed on mobile device screens. These scanners feature a lightweight design—weighing only 110 grams—and incorporate an LED targeting system that is gentle on the user's eyes. They are also built for durability, capable of withstanding drops from a height of 2.0 meters. The AT21Q-SM model is suited for general-purpose applications, while the AT21Q-HM model is specifically designed for reading ultra-fine, high-density codes, making it ideal for use in manufacturing facilities and hospitals.

Specifications for the DENSO AT21Q-SM and AT21Q-HM

4 Key Special Features of the DENSO AT20 Series Barcode Scanner

• High-Resolution Scanning (HM Model): Powered by a newly developed scanning engine, it can accurately read tiny barcodes as small as 0.10 mm—ideal for laboratory and industrial environments.
• Increased Efficiency with Multi-row Scanning: Capable of reading up to 3 rows of stacked barcodes in a single scan, significantly reducing operational time in logistics workflows.
• Rapid Scanning from LCD Screens: Equipped with an LED light control function that minimizes glare and reflections from mobile device screens, allowing for the instant scanning of digital coupons or electronic membership cards.
• Eye-Safe LED Marker Technology: Uses an LED light to define the scanning area instead of a laser, ensuring safety for the eyes of both staff and customers in retail environments like supermarkets.

Frequently Asked Questions (FAQ) about the DENSO AT21Q Barcode Scanner

Q: For use in hospitals and pharmacies, which model should I choose: the AT21Q-SM or the AT21Q-HM?
A: We recommend the AT21Q-HM model. In medical settings, small, high-density 1D or 2D barcodes are frequently printed on medication packaging, test tubes, or patient wristbands. The HM model is capable of reading ultra-fine codes—as small as 0.10 mm—with greater speed and precision than standard-specification models.

Q: How is the "Image Capture" function on this barcode scanner useful for daily operations?
A: The Image Capture function extends the scanner's utility beyond simple barcode reading. Staff can use the device to capture images—such as proof of goods receipt, small text on invoices, or documentation of damaged packaging—and instantly export these as JPEG or BMP image files directly into your primary computer system.

Authorized distributor of genuine DENSO WAVE barcode scanners with official manufacturer warranty.

Call 02-722-4040 or reach out via Line ID: @cps.co.th

DENSO AT21Q-SM (Black) Handheld 2D Barcode Scanner

The DENSO AT21Q is a handheld barcode and 2D code scanner from DENSO WAVE—the company that originally invented the QR Code.

Key features of the AT21Q-SM model:

• Versatile scanning: Capable of reading both 1D (linear) barcodes and 2D codes (such as QR Codes, SQRC, and Data Matrix), including codes displayed on mobile phone screens.
• High-speed performance: Rapid data scanning helps reduce operational time in warehouses and on-site work environments.
• Excellent readability for damaged codes: Can scan barcodes that are faded, torn, or soiled.
• Supports SQRC: Capable of reading Secure QR Codes (SQRC), used for applications requiring enhanced security or the protection of personal information.
• Multi-interface connectivity: Supports various connection types, including USB Keyboard, RS-232C, and USB COM.
• Durability: Features an IP42 rating for protection against dust and water splashes, and comes with an extended warranty (up to 5 years, subject to DENSO’s registration terms).

Applications:

• Warehousing and industrial manufacturing: For receiving goods and inventory management.
• Retail stores and point-of-sale (POS) systems.
• Healthcare and food service sectors (e.g., scanning labels on medications or medical supplies).

Specification comparison

The main difference between these 2 models will be "Minimum Resolution" when reading code. The HM (High Resolution) model can read smaller and more detailed codes than the SM (Standard Resolution) model.

Choose the model that best suits your needs:

AT21Q-SM (Standard): Ideal for general scanning tasks in warehouses and retail environments-a comprehensive solution.
AT21Q-HM (High Resolution): Designed for scanning exceptionally small or highly detailed codes; perfect for industrial, medical, and laboratory applications.

Datasheet : DENSO AT20 Series Barcode Scanner

Key Differences (SM vs. HM Models)

This high-performance hybrid barcode scanner (black) supports both 1D and 2D codes. The primary difference lies in their scanning resolution:

• Minimum Resolution:
  • AT21Q-SM (Standard Model): 0.167 mm for 2D codes | 0.125 mm for 1D barcodes.
  • AT21Q-HM (High-resolution Model): 0.125 mm for 2D codes | 0.10 mm for 1D barcodes (ideal for very small codes, such as those found in laboratories, hospitals, or on electronic components).Z
    
    
• Scanning Speed ​​and Angle: Equipped with a high-speed shutter to prevent motion blur caused by hand tremors; supports omnidirectional scanning (360-degree reading).
• Targeting System (Marker): Features an LED marker with a soft light, designed to be eye-friendly—perfect for service-oriented businesses and supermarkets.
• Industrial-Grade Durability: Rated IP42 for dust and water resistance; drop-resistant up to 2.0 meters (tested for up to 100,000 drops).
• Dimensions and Weight: Compact design, weighing only 110 grams (excluding the cable).
• Connectivity: Supports both USB (with switchable HID/COM modes) and RS-232C interfaces.

Key Features (AT20 Series)

• Supports the innovative rMQR Code: Capable of scanning elongated, narrow QR codes designed for use in space-constrained areas (requires the latest firmware update).
• Multi-row barcode scanning: Reads two rows of book barcodes—or up to three rows of other types of barcodes—in a single scan, significantly reducing operational time.
• Seamless scanning from mobile screens: Equipped with technology to suppress specular reflection, enabling rapid reading of labels displayed on smartphone screens.
• Image Capture function: Beyond scanning barcodes, the device can also capture images and export them as JPEG or BMP files.

DENSO AT21Q-SM (Black) Handheld 2D Barcode Scanner