Psychrometer Dimensions L x W x H: 165 x 70 x 38 mm Humidity measurement range: 0...100 % Temperature range: -29 ... 77 °C Temperature range, IR: -20...+200 °C Weight: 210 g Delivery with: Battery / Case / Probes Electrical supply: 1 x 6LR61/9V Measuring error, temperature, IR: ±3.5% Optical resolution: 8:1 Sensor type/thermocouples: IR / NTC / Pin moisture / Pinless moisture %rh resolution: 2.5 % No. of inputs: 3