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USB interface RFID desktop card reader

Model No.: QSF4100

Our QSF4100 is a high-performance UHF desktop reader ,which with built-in antenna and reading distance can reach 1m. Combined with a unique high-efficiency signal processing algorithm, it achieves high reading rate while achieving electronic labeling. Fast read and write processing, can be widely used in logistics, access control systems, anti-counterfeiting systems and production process control and other radio frequency identification (RFID) systems.


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Input Voltage DC 3.5V – 5 V.
Standby Current <80mA.
Working Current 180mA @ 3.5V (26 dBm Output,25°C).
110mA @ 3.5V (18 dBm Output,25°C).
Starting Time <100mS.
Operating Temperature – 20 °C  –  + 70  °C
Storage Temperature – 20 °C  –  + 85  °C
Operating Humidity < 95% (+ 25 °C)
Air Interface Protocol EPC global UHF Class 1 Gen 2 / ISO 18000-6C
Spectrum Range 902Mhz – 928Mhz, 865MHz – 868MHz (Optional)
Supported Regions US, Canada and other regions following U.S. FCC
Europe and other regions following ETSI EN 302 208
Mainland China
Output Power 10dBm, 18-26 dBm
Output Power Precision +/- 1dB
Output Power Flatness +/- 0.2dB
Receive Sensitivity < -70dBm
Peak Inventory Speed > 50 pcs/s
Tag Buffer Size 200 pcs @ 96 bit EPC
Tag RSSI Supported
Antenna D-100 2dbi Circular Polarization Antenna.
Read range:80cm-200cm  (Tested with Impinj E41b tag)
D-101 0dbi Circular Polarization Antenna.
Read range:10cm-50cm  (Tested with Impinj E41b tag)
Host Communication USB 2.0, RS-232, Wiegand 26, Wiegand 34
Baud Rate 115200 bps ( default and recommended)
38400 bps

PIN Assignments

Manufacturer D-10X RS-232 USB UHF RFID Desktop Card Reader

PIN Interface Description
1 + 9V External 9V power supply.
(Note: Don’t connect an external power supply and USB power supply both.)
2 GND Common ground with +9V external power.
3 RS-232 TXD RS-232 data output.
4 RS-232 RXD RS-232 data input.
5 GND Common ground with RS-232 interface.
6 GPIO3 GPIO3 or Wiegand Data 0.
7 GPIO4 GPIO4 or Wiegand Data 1.
8 GND Common ground with Wiegand data.


· PHY Chips PR9200 inside with outstanding performance and cost-effective

· Chip: FT232 USB to UART, providing the most stable USB communication

·  Read distance: 80cm-2m (D-100), 10cm-50cm (D-101)

·  Tested with Impinj E41b inlay

·  Host communication: USB 2.0/ RS-232/ Wiegand 26/ Wiegand 34

·  Super low power consumption; no additional cooling devices required under indoor use

·  Power supply: USB or independent power supply

·  Full compatible with different communication interfaces

·  Free Software Development Kit