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).Weight:1.17 lb (530 g).Panel Cutout:5.15″ x 3.97″ (131 x 101 mm).Front Panel Protection:IP64.Agency Approvals:CE.