MDM 300 Hygrometer

High Speed Dew-point Hygrometer

The MDM300 High-Speed Dew-point Hygrometer provides the fastest spot check measurement of dew point or moisture content in a small portable instrument packed with features and intelligent engineering.

The instrument features state of the art Bluetooth communication capabilities, large memory for data logging and a long battery life.

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  • Range: -100 to +20 deg C
  • Units of Measurement: Deg C, Deg F, PPMv, PPM w, gm/m3
  • Accuracy: +/- 1 deg C from +20 to – 60 deg C and +/- 2 deg C from -60 to -100 deg C
  • Response Time: T95 <10 min for -70 deg C
  • Display: Blue LCD Graphical display
  • Max. Pressure: 300 bar
  • Max. Temperature: -20 to +50 deg C
  • Battery Life: 48 hours
  • Dew point in natural gas processing and pipelines 
  • Monitoring of desiccant dryers for compressed air or plastic moulding equipment 
  • Moisture measurement in high-voltage switchgear quench gas 
  • Moisture measurement in petrochemical refineries 
  • Industrial gas production and transportation 
  • Medical gas quality 
  • Dew-point measurement in mettalurgical applications
  • …& many more! 

The MDM300 uses ceramic impedance sensor, which is constructed using state-of-the art thin and thick fi lm techniques. 

The operation of the sensor depends upon the adsorption of water vapour 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 upper layer that allows transmission of water vapour into the sensor is less than one nano-metre. The resulting sensor responds rapidly to changes in moisture – both in measuring humidity and also when being dried. It is very rugged and gives 1°C dew point accuracy coupled with excellent long-term reliability and stability.