Gas Monitor
Total Analytical Solution 
D-2-4, Setia Walk, Pusat Bandar Puchong,
47160 Puchong, Selangor, Malaysia
Tel: + 6012-921 3877; 603-5879 7121
Fax: +018 635 1593
   Home      Michell- Easidew I.S. Transmitter

Easidew I.S. Dew-Point Transmitter

(For Hazardous Area Applications)
The Easidew I.S. (intrinsically safe) transmitter is a dew-point transmitter designed and certified for use in hazardous area applications (flammable or explosive gases) in all regions with certification from: IECEx, CSA, FM and ATEX.

The Easidew I.S. is available with a a 5/8" UNF process connection or alternatively with a G1/2" BSP or 3/4" UNF process connection. It is designed for ease of use, incorporating all of the features needed to make installation and operation into your air or gas management system as simple as possible.

Michell's Advanced Ceramic Moisture Sensor Technology based transmitter is calibrated to international standards and is delivered with a traceable calibration certificate.

Product Features

  • IECEx, CSA, FM, ATEX certified transmitter for use in hazardous areas
  • 5/8" UNF, G1/2" BSP or 3/4" UNF process connection
  • Dew-point or ppmV moisture content
  • 2-wire loop powered connection
  • Rugged 316 stainless steel IP66 construction
  • Measurement range -100 to +20°C
  • Accuracy ±2°Cdp
  • Calibration Certificate (NPL, NIST)


  • Natural Gas & Petrochemicals
  • Power Generation

Technical Specifications

Measurement Range -100 to +20°C dew point
Accuracy ±2°C dew point
Response Time 5 mins to T95 (dry to wet)
Repeatability 0.5°C dew point
Calibration Traceable 7-point calibration certificate


Electrical Specifications

Output Signal
4-20 mA (2-wire connection, current source)
User-configurable over range
Output Dew point, moisture content in ppmV
Analog Output Scaled Range Dew point: -100 to +20°C
Moisture content in gas: 0 - 3000 ppmV
Non-standard available upon request
Supply Voltage 12 to 28 V DC
Load Resistance Max 250 Ω @ 12 V (500 Ω @ 24 V)
Current Consumption 20 mA max
CE Marked Certified


Operating Specifications

Operating Temperature -40 to +70°C
Operating Pressure 45 MPa (450 barg) maximum
Overpressure Rating x2 operating pressure 90 MPa (900 barg)
Flow Rate 1 to 5 Nl/min mounted in standard sampling block
0 to 10 m/sec direct insertion
Temperature Coefficient Temperature compensated across operating temperature range


Mechanical Specifications

Ingress Protection Sensor IP66 in accordance with standard BS EN 60529:1992
NEMA 4 in protection accordance with standard NEMA 250-2003
Hazardous Area Certificates ATEX - II 1 G Ex ia IIC T4 (-20°C ≤ Ta ≤ +70°C)
FM - IS / I / 1 / ABCD / T4 Ta = +70°C
FM - IS / I / I / ABCD / T4 Ta = +70°C
CSA - IS Class 1 Div 1 Groups ABCD T4
IECEx - Ex ia IIC T4 (-20°C ≤ Ta ≤ +70°C)
Housing Material 316 Stainless steel
Dimensions L=132mm x Ø45mm (with connector)
Filter (Sensor Protection) Standard: HDPE Guard <10μm
Optional: 316 stainless steel sintered guard <80μm
Process Connection and Material 5/8"- 18 UNF
Alternatives: G1/2" BSP or 3/4"- 16 UNF 316 stainless steel
Weight 150g
Interchangeability Fully interchangeable transmitter
Electrical Connections Hirschmann GDS series (DIN 4350-C)
Diagnostic Conditions
(Factory Programmed)
Sensor fault
Under-range dew point
Over-range dew point

23 mA
4 mA
20 mA
Approved Galvanic Isolators

D-2-4, Setia Walk, Pusat Bandar Puchong,
47160 Puchong, Selangor, Malaysia

Tel: + 6012-921 3877; 603-5879 7121
Fax: +018 635 1593