In fact a female affair …
is the donation of choice natural hair as humidity measuring element. The resulting manually adjusted sensitive natural hair grid has been employed for decades outdoors or when high accuracy is required. The precision mechanics meter drives the recording drum (acc. to DIN 58658), on which the special smear-proof charts are mounted. The even draft of curves as a continuous recording of rel. humidity is written by a felt pen.
manipulation proof measurement of humidity
very low maintenance
very robust (metal housing)
long-term stable measuring element
easy reading and handling
large temperature application range storage rooms