The GE HUMI-WB-XR-D HumiTrac XR Transmitter is rugged, compact and ideally suited for monitoring dew point, wet bulb, enthalpy or temperature in building automation and process applications. Using a capacitive RH sensor, the units’s microprocessor computes wet bulb.

Wet Bulb temperature is indicative of a wetted temperature sensor in an air stream. It is the temperature a volume of air would have if cooled adiabatically to saturation at constant pressure by evaporation of water into it, all latent heat being supplied by the volume of air. Wet bulb temperature is determined in this transmitter by calculation from the relative humidity and the ambient dry bulb temperature. Many building specifications are surrounding wet bulb measurement, so this transmitter helps provide a direct signal, reducing computing and offloading calculations.

The HUMIWBXRD features a field-replaceable Relative Humidity (RH) sensor tip module that allows the end user to replace the sensor on-site while maintaining ±2.5% RH accuracy. The user simply powers off the unit, installs the new sensor module and powers back the unit. This virtually eliminates the need for time consuming and costly factory calibration, while reducing downtime during service intervals to near zero.

The HUMI-WB-XR-D utilizes a rugged capacitive sensor that provides full-scale 0-99% RH measurement with unsurpassed response times, linearity and stability. Recovery to condensation and chemicals is excellent and an integrated filter, plus conformal-coated module electronics ensure long life. Signal conditioned temperature versions maintain specified RH accuracy across the full operating range of -40° F to 140° F (-40° C to 60° C). The transmitter also comes with a duct mounting configuration.