THC Temperature/Humidity Switch

Input: Up to 2 thermistors and 1 humidity sensor.
Measurement Range: Temperature: -58 to 302°F (-50 to 150°C); Humidity: 10 to 100% RH.
Output: 4 SPST, 8A relays @ 250 VAC.
Control Type: On/Off direction, direct or reverse acting, neutral.
Power Requirements: 110 or 230 VAC (depending on model).
Accuracy: Temperature: ±0.5% of probe range; Humidity: ±3% (20 to 80%) of range.
Ambient Operating Temperature: 32 to 158°F (0 to 70°C).
Panel Cutout: 5.15" x 2.37" (131 x 111 mm).
Front Panel Protection: IP64.
Complete Specifications

 THC-10 Temperature/humidity switch, °F, 110 VAC
 THC-11 Temperature/humidity switch, °C, 110 VAC
 THC-20 Temperature/humidity switch, °F, 230 VAC
 THC-21 Temperature/humidity switch, °C, 230 VAC
Probes Description
 THC-P Humidity Probe with 3V Output & 4 ft (1.2 m) Cable
Thermistor Probes Click here for probe options


Simultaneously measure and control temperature and humidity with the Series THC Temperature/Humidity Switch. The unit offers a 3-digit red display for temperature indication and a 3-digit green display indicating humidity. The Series THC is equipped with four independent relays, two for temperature control and two relays for humidity control.

The unit offers 61 programmable parameters for temperature and humidity control including set point, differential, direct/reverse acting, cycle time, alarm clock time, and decimal point adjustment. In the event of a probe error, the default operation of the relays can be set to open or close. The THC features error or alarm messaging and password protection.

The THC Temperature/Humidity Switch accepts up to two temperature probe inputs (sold separately) and a humidity sensor. A humidity sensor with 0-1V, 0-3V (sold separately), or 4-20 mA output can be used with the Series THC.