Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Updated:2025-03-13
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User's Manual
The AC-421 enables easy programming of any SDI-12 sensor by simply connecting the sensor to a computer's USB port.
Configuration of the sensor can be done using any terminal program or Apogee Instruments DSI software .
One side of the AC-421 features a USB connection for plugging into a computer. The other side of the AC-421 has +12 V out, GND, and SDI-12 data channels for connection to any standard SDI-12 sensor (for proper operation, please connect the ground wire first).
1、Easily configure and take sample measurements from any SDI-12 sensor directly with a computer and GUI
2、No data logger needed
3、Growing library of sensors with commands explained
4、Sensor power provided via USB
Applications:
1、SDI-12 sensor configuration or programming
2、SDI-12 sensor troubleshooting
3、Field use
4、Research applications
5、Classroom labs
| Input Voltage Requirement | 5V USB |
| Current Draw | 13 mA |
| Response Time | 0.6 s, time for detector signal to reach 95 % following a step change; fastest data transmission rate for SDI-12 circuitry is 1 s |
| Operating Environment | -45 to 80 C; 0 to 100 % relative humidity (non-condensing) |
| Dimensions | 60.40 mm x 17.40 mm x 12.45 mm |
| Mass | 11 g |
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