Intrinsically Safe Dew-Point Transmitter

Easidew I.S.

The Easidew I.S. (intrinsically safe) is designed to measure trace moisture and water dew-point in hazardous area applications. It is certified for measuring trace moisture in flammable or explosive gases and a wide range of non-polar liquids. It carries global hazardous area certification from IECEx, cQPSus, ATEX, and UKCA.


The Easidew I.S. is available with a choice of process connections for easy installation or retrofit.

  • Measurement ranges -110 up to +20 °Cdp
  • Dew point or ppmV moisture content output
  • 2-wire loop power connection
  • Accuracy ±2 °Cdp
  • Traceable calibration certificate
  • Easidew I.S. IECEx, cQPSus, ATEX and UKCA approvals
  • Low cost of ownership and easy maintenance with sensor exchange program
  • 316 Stainless steel sensor and sample blocks
  • 5/8” UNF, 3/4” UNF, G 1/2” process connections
  • KF40 Glove box flange
  • Oxygen service cleaned
Measurement Range-100...+20°C dew point
-110...+20°C dew point
Accuracy±2°C dew point
Response Time5 mins to T95 (dry to wet)
Repeatability0.5°C dew point
CalibrationTraceable 7-point calibration certificate
Electrical Specifications
Output Signal4...20 mA (2-wire connection, current source)
User-configurable over range
OutputDew point, moisture content in ppmV
Analog Output Scaled RangeDew point: -100...+20°C
Moisture content in gas: 0 - 3000 ppmV
Non-standard available upon request
Supply Voltage12...28 V DC
Load ResistanceMax 250 Ω @ 12 V (500 Ω @ 24 V)
Current Consumption20 mA max
CompliancesCE & UKCA
Operating Specifications
Operating Temperature-40...+60°C
Compensated Temperature Range:-20...+50 °C
NOTE: The transmitter accuracy statement is only valid for the temperature range: -20/+50 °C
Storage Temperature:-40...+60 °C
Operating Pressure45 MPa (450 barg) maximum
Overpressure Ratingx2 operating pressure 90 MPa (900 barg)
Flow Rate1...5 Nl/min mounted in standard sampling block
0...10 m/sec direct insertion
Mechanical Specifications
Ingress Protection SensorIP66 in accordance with standard BS EN 60529:1992
NEMA 4 in protection accordance with standard NEMA 250-2003
Hazardous Area CertificatesATEX/UKCA: II 1 G Ex ia IIC T4 Ga (–20 °C...+70 °C)
IECEx: Ex ia IIC T4 Ga (–20 °C...+70 °C)
TR CU: 0Ex ia IIC T4 Ga (–20 °C...+70 °C)
cQPSus: IS, Class I, Division 1, Groups A, B, C & D, T4
Class I, Zone 0, AEx ia IIC T4 Ga, Ex ia IIC T4 Ga
Tamb +70°C
Housing Material316 Stainless steel
DimensionsL=132mm x Ø45mm (with connector)
Filter (Sensor Protection)Standard: HDPE Guard <10μm
Optional: 316 stainless steel sintered guard <80μm
Process Connection and Material5/8"- 18 UNF
Alternatives: G1/2" BSP or 3/4"- 16 UNF 316 stainless steel
InterchangeabilityFully interchangeable transmitter
Electrical ConnectionsHirschmann GDS series (DIN 4350-C)
Diagnostic Conditions
(Factory Programed)
Sensor fault
Under-range dew point
Over-range dew point
23 mA
4 mA
20 mA
Approved Galvanic Isolators

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