General Tools & Instruments Deluxe Wbgt Heat Index Monitor with 75Mm Black Ball

Ideal for industrial uses including HVAC and outdoor sports medicine applications. Features and Benefits : Measures four parameters: Air temperaturerelative humidity dew point wet bulbtemperatureCE approved Specifications : Temperature Measurement Range:32 degrees to 122 degrees F (0 degrees to 50 degrees C)Temperature Measurement Accuracy: and plusmn;0.8 degrees F ( and plusmn;0.6 degrees C)Relative Humidity Measurement Range: 5 to 95 percentage RH Measurement Accuracy: and plusmn;3 percentage of readingWet Bulb Temperature Measurement Range:70 degrees to 115 degrees F (21 degrees to 45 degrees C)Wet Bulb Temperature Measurement Accuracy: and plusmn;2 degrees FDew Point Measurement Accuracy: and plusmn;3 percentage of readingBlack Ball Dimensions:2.95 (H) x 2.95 (Diam) in. (75 x 75mm)Dimensions of Instrument:11 x 3 x 3 in. (278 x 75 x 75mm)Weight: 5.3 oz. (150g)Power Source: 2 ?AAA? batteries (included) Includes : 0