The HT-670x Series Humidity Transmitters are intended to provide input to equipment under normal operating conditions. Where failure or malfunction of an HT-670x Series transmitter could lead to an abnormal operating condition that could cause personal injury or damage to the equipment or other property, other devices (limit or safety controls) or systems (alarm or supervisory) intended to warn of, or protect against, failure or malfunction of the HT-670x Series transmitter must be incorporated into and maintained as part of the control system.
The HT-670x Series wall mount and duct probe humidity transmitters use a patented All-Polymer sensor capable of sensing the entire range of 0 to 100% RH. Both transmitters feature a quick-mount, two-screw design, saving time and simplifying installation. A combination wallbox and surface mounting base connects to the unit for easy mounting directly to either drywall (spring clips provided) or a standard U.S. wallbox. All wiring connections for the humidity transmitters terminate on terminal blocks. The Johnson Controls TRUERH duct package offers an all plastic enclosure, which reduces thermal for improved accuracy.