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Intrinsically Safe Dew-Point Transmitter - Easidew I.S.

Updated:2023-09-20

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  • Brand: PST/Michell
  • Model: Easidew I.S.
  • Product description: 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 g
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Intrinsically Safe Dew-Point Transmitter - Easidew I.S.  Description:

Product Manual

Moisture Measurement in Hazardous Areas

Features

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

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.

Specifications

Performance
Measurement Range -100...+20°C dew point
-110...+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...+20°C
Moisture content in gas: 0 - 3000 ppmV
Non-standard available upon request
Supply Voltage 12...28 V DC
Load Resistance Max 250 Ω @ 12 V (500 Ω @ 24 V)
Current Consumption 20 mA max
Compliances CE & 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 Pressure 45 MPa (450 barg) maximum
Overpressure Rating x2 operating pressure 90 MPa (900 barg)
Flow Rate 1...5 Nl/min mounted in standard sampling block
0...10 m/sec direct insertion
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/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 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 Programed)
Condition
Sensor fault
Under-range dew point
Over-range dew point
Output
23 mA
4 mA
20 mA
Approved Galvanic Isolators
KFD2-CR-EX1.20200
KFD2-CR-EX1.30200
KFD0-CS-EX1.50P
KFD0-CS-EX2.50P
KFD2-STC4-EX1.H
MTL5041
MTL5040

Suitable Applications

Trace moisture in flammable or non-flammable non-polar liquids

Dew-point measurements in flammable or explosive gases, including natural gas

Compressed air dryers in hazardous areas

Trace moisture and dew-point measurements in CNG Stations

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