Humidity and Temperature Transmitter

The Series 657 Relative Humidity/Temperature Transmitters provide two 4-20 mA channels to produce separate output signals for both relative humidity and temperature. These devices deliver ±2% accuracy for humidity and +-1 degree F for temperature measurements. Stainless steel probe can be easily mounted to most ductwork using either of the two optional kits below. Features: * Polymer film humidity and thin film RTD temperature sensors offer highly reliable and stable measurements. * Remote mount housing offers installation flexibility (657-1) * Rugged die-cast aluminum housing is great for industrial applications (657C-1)