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Compressed air
Optidew Humidity Meters
Michell Instruments' Optidew 401 and 501 are fast-response cooled mirror-based humidity meters.
Optidew 401 and 501 are fast-response chilled mirror principle humidity meters.
The meters are excellent for industrial humidity monitoring and precise laboratory applications.
Available as a tabletop or wall-mounted version. Optidew 501 is also available as a transmitter version without a local display.
Accuracy ±0.15°C across the -40...+120°C dew point measurement range.