MDM300 & MDM300 I.S. (Intrinsically Safe) Advanced Portable Dew-point Hygrometer


MDM300 Sampling Options

A high-speed portable dew-point hygrometer, offering rapid spot-check measurements of dew point or moisture content in many applications, including compressed air, natural gas and highvoltage switchgear quench gas. This lightweight, ATEX, IECEx, FM, CSA, GOST and INMETRO certified product allows more measurements per working hour than any other comparable product. A hard-wearing but ergonomic case and an easy-to-use interface allows comfortable and practical operation in the toughest industrial environments.



Product Features

  • Repeatedly fast measurements at low pressure from less than 15 minutes for T95 to -60°C
  • Higher pressure measurements possible – up to 350 barg
  • 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
  • 4-20 mA external device input for transmitter calibration and validation
  • Lightweight: less than 1.5kg
  • 13 point traceable calibration certificate

MDM300 & MDM300 Intrinsically Safe








Technical Specification
MDM300

MDM300 Intrinsically Safe
Performance
Measurement Technology Michell ceramic sensor
Accuracy ±1°C from -60 to +20°C dew point
±2°C from -100 to -60°C dew point
±0.2°C temperature
Calibrated Range Spot Checks: -70 to +20°C dew point
Online Analysis: -100 to -70°C dew point
Uncalibrated Readings From +20 to +30°C dew point
Measurement Units °C, °F, K dew point & gas temperature ppmV,
ppmW for air, N2, H2, CO2, SF6
%RH, g/m3, g/kg
Option: active pressure (bara/g, psig, MPa, KPa)
°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 dew point
Typical Response Speed T95 in ≤15 minutes to -60°C T95 in ≤30 minutes to -60°C dew point
Electrical Input/Output
Auxiliary Inputs 4-20 mA loop-powered external input selectable as either dew point, temperature or pressure Connection to Michell Easidew TX I.S. or Easidew PRO I.S. via Remote Sensor Interface
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 (charger not certified for hazardous area use)
Operating Conditions
Operating Pressure 350 barg max
Operating Environment Outdoors 0 to +100% RH condensing
Operating Temperature -20 to +50°C
Storage/Transport Temperature -40 to +70°C
Mechanical Specifications
Display Blue LCD graphical display
Enclosure Type Steel fibre-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 to 1.2 Nl/min 0.2 to 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 90mm (d x w x h)
Weight 1.35kg 1.5kg
General
Data Logging 8 megabytes; Log interval: 5 to 60 sec; Logs per log file: Up to 10,000
Communications (Wireless) BluetoothTM range up to 5m (version 2.0)
User Interface Languages English, French, German, Italian, Portuguese, Spanish
Certification Codes
  CE ATEX & IECEx – EX Group II Cat 1G Ex ia IIC T4 Ga -20°C to 60°C
CSA/FM – NEC 500 Class 1 Div 1 Groups A,B,C,D T4
INMETRO - Ex ia IIC T4 Ga (-20°C to +50°C)
GOST-R, GOST-K
CE

Accessories

MDM300 Sampling Options MDM300 Sampling Options
To get the best possible performance from your MDM300 or MDM300 I.S., it is crucial to have appropriate sample conditioning for your measurement point.

Related Products

MDM50 MDM50
Designed to make high-speed spot check measurements to -50°C dew point as simple as possible, simply connect your sample gas, turn on the instrument and it will automatically begin to measure the dew point of the applied sample.
Easidew Portable Easidew Portable
The Easidew Portable Hygrometer has been designed to make spot checks of the dew point in air and gases as simple as possible. Simply connect your sample gas, turn on the instrument and it will automatically begin to measure the dew point of the applied sample.
MDM25 MDM25
The MDM25 is a portable, battery-operated handmeter, that measures relative humidity, temperature and calculated dew-point, volumetric humidity or wet bulb temperature.
Condumax II Transportable Condumax II Transportable
Transportable natural gas dew-point analyzer system for operation in the field. Suitable for IEC Zone 1 or 2 hazardous area, NEC Class I, Division 1 Groups B, C, D.
Easidew PRO XP Easidew PRO XP
Explosion proof dew-point transmitter, with ±1°C dew-point accuracy. IECEx, CSA, FM and ATEX certification makes the Easidew PRO XP ideal for a wide variety of explosion proof /flameproof rated applications. 3/4" UNF process connection.