Campbell Scientific CS506 Fuel Moisture Monitoring for Fire Safety

The CS506 reports the status of small-diameter (10-hour) forest fire fuels as percent moisture by weight (1%=1 g water/100 g dry fuel).

It consists of an epoxy-encapsulated electronics package that uses time-domain reflectometry (TDR) technology to measure the moisture content of the 26601 10-hour Fuel Moisture Stick.

The sensor produces a ±0.7 Vdc square-wave frequency that is read using an analog or pulse channel on a Campbell Scientific datalogger.

The datalogger then converts the frequency measurement to percent fuel moisture via a quadratic calibration.