R20D USB 125 kHz Proximity Card Reader
- Product Code: R20D-ID-USB reader
R20D USB 125 kHz Proximity Card Reader
The R20D USB 125 kHz Proximity Card Reader is a compact desktop RFID reader designed to transfer the identification number of compatible low-frequency proximity cards directly to a computer. It operates through a USB connection and can automatically enter the card number into an active software field, web form or text-entry area when a compatible card is presented.
The R20D can be used in personnel attendance systems, visitor registration applications, membership platforms, parking management, user verification and card-enrolment processes. Its keyboard-emulation operation allows it to be deployed in many applications without the need for complex custom software development.
Key Features
Reads the identification number of compatible low-frequency proximity cards.
Connects directly to a computer through a standard USB port.
Can automatically enter the card number into the active text field.
Standard USB HID configurations generally require no additional driver.
Provides visual and audible feedback when a card is successfully read.
Takes up minimal space at reception desks, security points and offices.
How Does It Work?
- Connect the R20D reader to the computer using the USB cable.
- Open the application, web form, Excel file or text field where the card number will be entered.
- Place the cursor in the required data-entry field.
- Present a compatible 125 kHz proximity card to the reader.
- The card identification number is automatically entered into the selected field.
Application Areas
Technical Specifications
| Model | R20D |
| Product Type | USB desktop LF RFID proximity card reader |
| Operating Frequency | 125 kHz |
| Card Technology | Compatible 125 kHz ID and proximity cards |
| Connection Interface | Wired USB |
| Data Output | USB HID keyboard emulation; may vary by configuration |
| Power Supply | DC 5 V through USB |
| Reading Distance | Approximately 0–80 mm with a compatible card under suitable conditions |
| Reading Time | Less than 200 ms |
| Dimensions | Approximately 104 × 68 × 10 mm |
| Weight | Approximately 140 g |
| Cable Length | Approximately 1.4 m |
| Housing Material | ABS |
| Operating Temperature | -10°C to +70°C |
| Operating Humidity | Below 90% |
Technical values may vary depending on the product configuration, card chip and antenna design, data-output format and operating environment. Card compatibility and the card-number format required by the software should be confirmed before ordering.
Benefits of the R20D USB Proximity Card Reader
- Provides fast and straightforward installation through USB.
- Generally requires no additional driver or serial-port configuration in compatible systems.
- Can automatically transfer the card number to the active software field.
- Can be integrated easily with compatible attendance, membership and visitor-management software.
- Takes up minimal space with its compact and durable ABS housing.
- Supports fast enrolment of personnel and user cards.
Important Card Compatibility Information
The R20D is intended only for reading the identification number of compatible 125 kHz proximity cards. It does not support 13.56 MHz MIFARE or NFC cards. Not every 125 kHz card uses the same chip structure or data format, so the card model, number length and output format required by the software should be checked before ordering.
Why Atlas HCS?
Frequently Asked Questions
Which cards can the R20D read?
The R20D can read the identification number of compatible 125 kHz LF ID or proximity cards. The card chip model and data format should be checked to confirm compatibility.
Can the R20D read MIFARE or NFC cards?
No. MIFARE and NFC cards generally operate at 13.56 MHz, while the R20D is designed for compatible 125 kHz proximity cards.
Does the R20D require special software or a driver?
Standard USB HID keyboard-emulation configurations generally require no additional driver. Special card-number formats may require configuration.
Which applications can receive the card number?
The card number can be entered into the active field in Notepad, Excel, web forms, attendance software, membership platforms or another compatible application that accepts keyboard input.
Can the R20D write data to a card?
The R20D is primarily intended for reading card identification numbers. A different reader model should be considered for card writing, cloning or secure authentication applications.
Check Card Compatibility and Request a Quotation
Share the proximity-card chip model, card-number format and software details with Atlas HCS to evaluate whether the R20D is suitable for your project and request a corporate quotation.