Dew-point hygrometers typically consist of a polished metal mirror that is cooled at a constant pressure and constant vapour content until moisture just starts to condense on it. The temperature of the metal at which condensation begins is the dew point. A dew-point hygrometer was invented in 1751.
Brand: Extech Instruments
from
Rp.16,636,9040
Brand: Delta Ohm
from
Rp.9,233,4990
Brand: Defelsko
from
Rp.26,232,2150
Brand: PCE Instruments
from
Rp.13,500,0800
Brand: Extech Instruments
from
Rp.13,500,0800
Brand: Extech Instruments
from
Rp.4,704,9940