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.
![Shaw SDHmini-EX [SDHmini-EX-B-4-EU] Intrinsically Safe Dewpoint Hygrometer, Blue and 1/4 in Swagelok SS Compression Type](image/cache/wp/gj/Products/Shaw_SDHmini-EX-200x200.webp "Shaw SDHmini-EX [SDHmini-EX-B-4-EU] Intrinsically Safe Dewpoint Hygrometer, Blue and 1/4 in Swagelok SS Compression Type")
![Shaw SDHmini [SDHmini-B-G-4-EU] Dewpoint Hygrometer, Standard, Grey and 1/4 in Swagelok SS Compression Type](image/cache/wp/gj/Products/Shaw_SDHmini-200x200.webp "Shaw SDHmini [SDHmini-B-G-4-EU] Dewpoint Hygrometer, Standard, Grey and 1/4 in Swagelok SS Compression Type")
Brand: Shaw
from
Rp.122,705,000
![Extech RH401 [RH-401] Digital Psychrometer & InfraRed Thermometer](image/cache/wp/gj/Products/Extech_RH401-200x200.webp "Extech RH401 [RH-401] Digital Psychrometer & InfraRed Thermometer")
Brand: Extech Instruments
from
Rp.8,500,000
Brand: Extech Instruments
from
Rp.12,796,228
![Extech EA25 [EA25] EasyView™ Hygro-Thermometer and Datalogger](image/cache/wp/gj/Products/Extech_EA25-200x200.webp "Extech EA25 [EA25] EasyView™ Hygro-Thermometer and Datalogger")
Brand: Extech Instruments
from
Rp.7,850,000
![Extech EA20 [EA20] EasyView™ Hygro-Thermometer](image/cache/wp/gj/Products/Extech_EA20-200x200.webp "Extech EA20 [EA20] EasyView™ Hygro-Thermometer")
![Extech RH520A [RH520A] Humidity+Temperature Chart Recorder with Detachable Probe](image/cache/wp/gj/Products/Extech_RH520A-200x200.webp "Extech RH520A [RH520A] Humidity+Temperature Chart Recorder with Detachable Probe")
Brand: Extech Instruments
from
Rp.12,500,000
