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      Portable Dew-Point Hygrometer MDM300 series
      Portable Dew-Point Hygrometer MDM300 series
      Portable Dew-Point Hygrometer MDM300 series
      Portable Dew-Point Hygrometer MDM300 series

      Portable Dew-Point Hygrometer MDM300 series

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      • Repeatedly fast measurements at low pressure from less than 15 minutes for T95 to -60 °C (-76 °F)
      • Higher pressure measurements possible – up to 350 barg (5076 psig)
      • Long battery life: up to 48 hours of typical use between charges
      • Intuitive application kits allow quick and straightforward connection to your sample point
      • Durable, yet easy to handle and operate: designed for use in industrial environments
      • Lightweight: less than 1.5 kg (3.3 lb)
      • 13-point traceable calibration certificate
      Quantity :
      No Product available
      • Delivery policy Delivery time in Lithuania 1-2 working days, to other EU countries 3-5 w.d. to other non-EU 5-9 w.d.
      • Return policy Order could be returned in 15 days.

      A high-speed portable dew-point hygrometer for rapid spot-check measurements of dew point or moisture content in compressed air, natural gas, high voltage switchgear quench gas and many other applications. The sensor responds quickly to changes in moisture whether from dry to wet or wet to dry. This means there is no need to wait between measurements, allowing operators to make more measurements in a day.

      The general purpose MDM300 is suitable for safe area use, while the intrinsically safe MDM300 I.S. has global hazardous area approval from ATEX, UKCA, IECEx, cQPSus and EAC Ex and is able to measure moisture in flammable gases such as natural gas or bio-gas.


      It has a hard-wearing, ergonomic case and an easy-to-use interface for comfortable and practical operation in the toughest industrial environments.

      MDM300 Intrinsically safe
      Performance Specifications
      Measurement Technology Michell ceramic metal-oxide moisture sensor
      Accuracy ±1 °C (±1.8 °F) from -60 to +20 °C (-76...+68 °F) dew point
      ±0.2 °C (±0.36 °F) temperature
      Calibrated Range Spot Checks: -70...+20 °C (-94...+68 °F) dew point
      Online Analysis: -100...-70 °C (-148...-94 °F) dew point
      Uncalibrated Readings From +20...+30°C (+68...+86°F) dew point
      Measurement Units °C, °F, K dew point & gas temperature ppmV,
      ppmW for air, N2, CO2, SF6
      %rh, g/m3, g/kg
      °C, °F, K dew point & gas temperature
      ppmw & g/kg for air, N2, H2, CO2, SF6
      ppmv, lb/MMscf & g/m3 for natural gas
      ppmv, g/m3 & %rh
      Resolution (Display) 0.1 for all dew-point derived units and autoranging where appropriate
      Resolution (Measurement) Better than 0.1°C (0.18°F) dew point
      Typical Response Speed T95 in ≤15 minutes to -60°C (-76°F) dew point T95 in ≤30 minutes to -60°C (-76°F) dew point
      Electrical Specifications
      Battery Type NiMH 4.8V
      Battery Operating Life Up to 48 hours of typical usage between charges Up to 24 hours of typical usage between charges
      Battery Charger Intelligent charger (supplied) Intelligent charger (not certified for hazardous area use)
      Operating Specifications
      Operating Pressure 35 MPa (350 barg / 5076 psig) max
      Operating Environment Outdoors 0...+100% rh condensing
      Operating Temperature -20...+50 °C (-4...+122 °F)
      Storage/Transport Temperature -20...+50 °C (-4...+122 °F)
      Mechanical Specifications
      Display Blue LCD graphical display
      Enclosure Type Steel fiber-loaded high-impact polyamide 6
      IP/NEMA Rating IP66/NEMA 4
      Gas Connections 1/8” NPT female (other options available)
      Flow Across Sensor 0.2...1.2 Nl/min 0.2...0.5 Nl/min
      Gas Wetted Materials AISI 316L stainless steel AISI 316L stainless steel, PTFE Seal, Borosilicate glass, ceramic
      Outline Dimensions 218 x 170 x 90 mm (8.58” x 6.69” x 3.54”) (d x w x h)
      Weight 1.35 kg (2.98 lb) 1.5 kg (3.31 lb)
      Data Logging 8 megabytes; Log interval: 5...60 sec; Logs per log file: Up to 10,000
      Communications (Wireless) BluetoothTM range up to 5 m (version 2.0)
      User Interface Languages English, French, German, Italian, Portuguese, Spanish
      Certification codes

      ATEX/UKCA: II 1G Ex ia IIC T4 Ga (-20 °C...+50 °C)

      IECEx: Ex ia IIC T4 Ga (-20 °C...+50 °C)

      TR CU Ex: 0Ex ia IIC T4 Ga

      cQPSus: Class I, Division 1, Groups A B C D, T4 Class I, Zone 0,
      AEx/Ex ia IIC Ga T4 (-20 °C...+50 °C)
      PST Group

      Data sheet


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      Portable Dew-Point Hygrometer MDM300 series

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      Portable Dew-Point Hygrometer MDM300 series

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