971 Temperature Humidity Meters, -20°C to 60°C (-4°F to 140°F)Calculates wet bulb and dew point temperatures instantly Operational in temperature ranging from 20C ( 4F) to 60C (140F) and in humidity ranging from 0C (32F) to 60C (140F) Meter accuracy is 0. 5C (1. 0F) when using in temperatures between 0C (32F) and 45C (113F) and 1. 0C (2. 0F) in temperatures ranging from 20C ( 4F) to 0C (32F) and from 45C (113F) to 60C (140F) Resolution is 0. 1C (0. 1F) Response time of 500 ms Response time (humidity) for 90% of