Bacharach Replacement Bulb – 25 to 120 °F

The Dickson TH8P3 is a portable device which automatically records the air temperature (-20-120°F) and humidity (0-110%) 24-hours/day, seven days per week, providing a permanent record, even when you can't be on-site.

Reading options include air temperature, relative humidity, dew point and wet bulb!