Reading Echo Temperature Sensors with a CR10X Datalogger (13400-00 AN)

January 11, 2007 by Gaylon S. Campbell

• Products:
  • Sensors,
  • Environmental Sensors,
  • ECT Air Temperature Sensor,
  • Campbell Scientific Data Logger Programming

The ECH₂O temperature sensor consists of a 10K precision resistor and a 10K thermistor in a waterproof over mold. The resistor and thermistor form a three wire half bridge. Three wires come from the sensor: ground, excitation, and output. These are connected to a stereo connector. The base of the connector is ground, the tip is excitation, and the ring is output. When the connector is plugged into the Echo pigtail adapter, the white wire of the adapter is excitation, and the red wire is output.

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