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

Updated:2023-09-20

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  • 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 ppmW 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 ppmV
Non-standard :mg/m3, lbs/MMSCF natural gas
Moisture content in liquid: 0...1000 ppmW 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 ppmW 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

Suitable Applications

Moisture in natural gas production and processing

Pipeline drying

On-line fiscal metering of gas

Dew-Point measurement in LNG production processing

Petrochemical process liquids

Trace humidity measurement in polymer production

Moisture analysis in CNG drying

Dew Points in I.S. areas

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