Cut out the waiting with the MDM300 High-speed dew-point hygrometer.


  • Repeatedly fast measurements in less than 10 minutes for T95 down to -95°F (-70°C) dew point
  • Long battery life: more than 48 hours of typical usage between charges
  • Best in its class: ±1.8°F (±1°C) dew point accuracy
  • External 4-20mA device input for dew-point, temperature or pressure transmitters
  • Bluetooth connection for trouble-free download of data
  • Built in sampling system to 4500psi with external options to 6000psi
  • Lightweight: less than 3lbs
  • Easy operation: just switch on and measure


Compressed Gas Breathing Air Drying Of Plastics
Military / Defense General Engineering Power Generation Beverage Industry General Gases


The MDM300 uses Michell's highly developed ceramic impedance sensor, which is constructed using state-of-theart thin and thick film techniques. Operation of the sensor depends upon the adsorption of water vapor into a porous non-conducting "sandwich" between two conductive layers built on top of a base ceramic substrate. The active sensor layer is very thin - less than one micron and the porous top conductor that allows transmission of water vapor into the sensor is less than 4x10-8 inches. The resulting sensor responds rapidly to changes in moisture - both in detecting moisture and also when being dried. It is very rugged and gives ±1.8°F (±1°C) dew point accuracy coupled with excellent long-term reliability and stability.