Dwyer: THC-21 Temperature/humidity switch, C, 230 VAC.
The SERIES THC simultaneously measures and controls temperature and humidity. 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 THC Temperature/Humidity Switch accepts up to two temperature probe inputs (sold separately) and a humidity sensor. A humidity sensor with 0 to 1 V, 3 V (THC-P sold separately), or 4 to 20 mA output can be used with the Series THC.
Measurement Range : Temperature : -58 to 302°F (-50 to 150°C); Humidity: 10 to 100% RH.
Input : Up to 2 thermistors and 1 humidity sensor.
Output : 4 SPST, 8 A relays @ 250 VAC.
Horsepower Rating (HP) : 1/3 HP.
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 90%) of range.
Display : Two 3-digit displays. 1/2″ digits.
Resolution : 0.1°.
Memory Backup : Nonvolatile memory.
Ambient Operating Temperature : 32 to 158°F (0 to 70°C).
Storage Temperature : -4 to 176°F (-20 to 80°C).
Panel Cutout : 5.15″ x 3.97″ (131 x 101 mm).
Front Panel Protection : IP64.
Agency Approvals : CE.