General Tools WBGT8758 Deluxe Heat Index Monitor

An industry breakthrough for outdoor sports designs to monitor heat conditions. Four measurement parameters: WBGT (Wet Bulb Globe Temperature) TG (Globe Temperature) TA (Air Temperature) % (Relative Humidity). Includes: 2 AAA Batteries. Black ball size: Dia. 40mm Height 35mm. Temp.(TG) range: 32 to 122F (0 to 50C). Temp.(TG) accuracy: +/-2F (+/- 1C). WBGT Temp.range: 32 to 122F (0 to 50C).