Description

Hygrothermograph is a precious, self-contained instruments that measures and records ambient temperature and relative humidity simultaneously on a double scale chart. This instrument is ideal for measurement in laboratories, computer room or agricultural areas. The hygrothermograph employs an aged bimetal strip which distorts with changes in the temperature. This distortion is magnified through a lever system which moves a pen arm over the upper half of the 7-inch high chart. The response is linear. Temperature is recorded over 60C or 110C span. A specially treated bundle hair is used to measure relative humidity over the full range of 0 to 100%