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AC-421 SDI-12 to USB Converter

Updated:2025-03-13

Brand: Apogee
Model:AC-421
Description: 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 Instrume
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Product Details

Overview of AC-421 SDI-12 to USB Converter：

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

AC-421 Sensor Drawing：

Specifications of AC-421：

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