The Series RHL transmitter from Dwyer Instruments Inc., Michigan City, IN, is available in a humidity or a humidity/temperature version and its polymer capacitance sensor is unaffected by condensation, fog, high humidity, or contaminants. The 2-wire transmitter provides a 4–20 mA loop-powered output (dual 4–20 mA output signals for the humidity/temperature version). Accuracy is ±3% RH and ±0.9°F at 72°F. A 2-line alphanumeric LCD is optional for the humidity/temperature models.
Dwyer Instruments Inc.