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Transmitter for Moisture Analysis - Michell Easidew PRO I.S.

Updated:2025-03-13

Brand: PST/Michell
Model: Easidew PRO I.S.
Description: The Easidew PRO I.S. Intrinsically safe dew-point transmitter measures moisture in demanding process and refinery applications in either gases or non-polar liquids.It offers a wide measurement range o
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Product Details

Transmitter for Moisture Analysis - Michell Easidew PRO I.S. Description：

Product Manual

Intrinsically Safe Dew-Point Measurement in Hazardous Areas

Features

Measurement range –110...+20 °Cdp

ATEX, IECEx, UKCA, cQPSus, TR CU Ex certified

Accuracy ±1 °Cdp

2-wire 4...20 mA output

Traceable 13-point calibration certificate

450 barg pressure rating

Alternative process connections available

Material certification to BS EN 10204 3.1

Moisture in gases and liquids

Service exchange program

Oxygen Service cleaned

The Easidew PRO I.S. Intrinsically safe dew-point transmitter measures moisture in demanding process and refinery applications in either gases or non-polar liquids.

Based on Michell’s Ceramic Metal-Oxide Moisture Sensor, the Easidew PRO I.S. gives long term stability and a fast response to changes in moisture. With high-volume manufacturing capacity, the Easidew PRO I.S. is suitable for use by OEMs and systems integrators, who require short and consistent lead times.

It offers a wide measurement range of –110 to +20 °Cdp, is easily integrated into existing systems and has global certifications for use in hazardous areas. The unit’s robust housing protects the electronics from harsh environmental conditions.

Specifications

Product	Easidew PRO I.S. for Gases	Easidew PRO LQ I.S. for Liquids
Performance Specifications
Measurement Range	-110...+20 °C (-166...+68 °F) dew point; -100...+20 °C (-148...+68 °F) dew point	0 to 1000 ppm_W capability – factory configured to customer-required range and application
Accuracy	±1 °C (±1.8 °F) dew point (+20...-60 °C / +68...-76 °F) ±2 °C (±3.6 °F) dew point (-60...-110 °C / -76...-166 °F)
Response Time	5 mins to T95 (dry to wet)
Repeatability	0.5 °C (0.9 °F) dew point
Calibration	Traceable 13-point calibration and certificate
Electrical Specifications
Output Signal	4...20 mA (2-wire connection, current source); User configurable over range
Output	Dew point or moisture content	Moisture content
Analog Output Scaled Range	Dew point:-110...+20 °C (-166...+68 °F) or –100...+20 °C (-148...+68 °F) Moisture content in gas: 0...3000 ppm_V Non-standard :mg/m³, lbs/MMSCF natural gas	Moisture content in liquid: 0...1000 ppm_W capability – factory configured to customer-required range and application
Supply Voltage	12...28 V DC
Load Resistance	Max 250 Ω @ 12 V (500 Ω @ 24 V)
Current Consumption	23 mA max, depending on output signal
Saturation Constants (for moisture in liquids measurements only)		6-point look-up table for saturation constants up to 1000 ppm_W over the temperature range 0...+50 °C (32...+122 °F); saturation constants for 10 common liquids can be programmed into the Easidew PRO LQ IS via the application software; alternatively, the user can program saturation constants manually
CE & UKCA Conformity	Approved
Operating Specifications
Operating Temperature	–40...+60 °C (-40...+140 °F)
Compensated Temperature Range	-20...+50 °C (-4...+122 °F) NOTE: The transmitter accuracy statement is only valid for the temperature range: -20/+50 °C (-4/+122 °F)
Storage Temperature	-40...+60 °C (-40...+140 °F)
Operating Pressure	45 MPa (450 barg / 6526.7 psig) maximum
Flow rate	1...5 Nl/min mounted in standard sampling block 0...10 m/sec direct insertion	0.1...0.3 L/min through Easidew sample block 0.1...1 m/s direct insertion
Mechanical Specifications
Ingress Protection	IP66 in accordance with standard BS EN 60529:1992; NEMA 4 protection in accordance with standard NEMA 250-2003
Intrinsically safe area certificates*	ATEX/UKCA: II 1 G Ex ia IIC T4 Ga (–20 °C...+70 °C) IECEx: Exd 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
Russian Pattern Approval	Russia (GOST-R), Kazakhstan (GOST-K)
Canadian Pressure Vessel Certification	C.R.N. — 11 Canadian provinces
Oxygen service	Optional: cleaned for enriched oxygen
Housing material	316 stainless steel
Filter (sensor protection)	Standard: Stainless steel sintered guard (for protection against fine particulate >80μm) Optional: HDPE guard (for protection against fine particulate >10μm)
Process Connection and Material	316 stainless steel 5/8” — 18 UNF with bonded seal, G1/2” and 3/4” UNF adaptors available (material certificate to BS EN 10204 3.1 — see ‘accessories and spare parts’ on product order codes)
Weight	1.27 kg (2.8 lb)
Electrical Connections	Screw terminal via female M20 x 1.5mm gland
Diagnostic conditions (factory programmed)	Condition Output Sensor fault 23 mA Under-range dew point 4 mA Over-range dew point 20 mA
Approved galvanic isolators	KFD2-CR-EX1.20200 KFD2-CR-EX1.30200 KFD0-CS-EX2.50P KFD0-CS-EX1.50P KFD2-STC4-EX1.H MTL5040 MTL5541 MTL5041