The ACI Relative Humidity with Thermistor Outside Air Series utilizes a thermoset polymer capacitive sensing element with factory applied hygroscopic filter to deliver a proportional analog current or voltage output signal

The hygroscopic filter provides added resistance to moisture, dust, and other chemicals for greater long term reliability

The RH Outside Air transmitter features integral DIP switches for field selection of the proper output signal and supply voltage to meet your applications requirements

Each unit also contains 0%, 50%, and 100% test options to verify that the transmitter is both working and wired properly

Field calibration also can be performed by using the increment and decrement calibration DIP switches without the need to replace the sensing element

These enhancements provide increased flexibility and outstanding long-term reliability

Outside Air configurations feature a weatherproof Euro style enclosure with gasketed cover and conformally coated circuit boards for added moisture and chemical resistance

Three point NIST Calibration Certificates are available.