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


Easidew comms kit
The Easidew PRO I.S. transmitter is a reliable and accurate 2-wire dew-point transmitter for trace moisture measurement in a wide range of gas and liquid process applications. Tough and durable, with global certifications and approvals, it is suitable for natural gas, petrochemical and refinery applications.

Simple Operation

The Easidew PRO I.S. is easy to install and operate. It requires a 12 to 28 V DC supply and provides a linear 4-20 mA signal representing moisture content.

Moisture in Gases

The output can be configured by the customer, using simple software, to any range within -100 to +20°Cdp, or 0-3,000 ppmV in gases.
As the Easidew PRO I.S. responds to water vapor pressure in the gas sample, it will give the user an accurate determination of the actual dew-point at pressure up to 45 MPa (450 barg).
Flow rate is not critical to measurement accuracy (1 to 5 Nl/min), though speed of response will be improved by operating at a higher sample flow.

Moisture in Liquids

In addition to its Moisture in Gases capabilities the Easidew PRO I.S. can be used to monitor moisture in non-polar liquids.
It is factory programmed to provide an output in ppmW. This requires the saturation constants of the liquid to be programmed into the transmitter either at the factory or by the user, using the
free application software available.


Product Features

  • Measurement range –110 to +20°Cdp
  • ATEX, IECEx, cCSAus, FM, TC TR 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
Easidew PRO I.S.

Technical Specifications

Easidew PRO I.S. for Gases Easidew PRO LQ I.S. for Liquids
Performance Specifications
Measurement Range -110 to +20°C dew point; -100 to +20°C dew point0 to 1000 ppmW;
Non-standard available on request
Accuracy ±1°C dew point (+20 to -60°C); ±2°C dew point (-60 to -110°C)
Response Time 5 mins to T95 (dry to wet)
Repeatability 0.5°C 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 to +20°C
Moisture content in gas: 0-3000 ppmV
Non-standard:mg/m3, lbs/MMSCF natural gas
Moisture content in liquid: 0-1000 ppmW
Non-standard available on request
Supply Voltage 14 to 28 V DC
Load Resistance Max 250 Ω @ 14 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 to +50°C; Saturation constants for 8 common liquids can be programmed into the Easidew PRO XP LQ via the application software;
Alternatively the user can program saturation constants manually
CE Conformity 2004/108/EC, 94/9/E ATEX , 2006/95/EC
Operating Specifications
Operating Temperature –40 to +70°C
Operating Pressure 45 MPa (450 barg) maximum
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 IP66 in accordance with standard BS EN 60529:1992;
NEMA 4 protection in accordance with standard NEMA 250-2003
Intrinsically safe area certificates ATEX: II 1 G Ex ia IIC T4 Ga (–20°C to +70°C)

IECEx: Exd ia IIC T4 Ga (–20°C to +70°C)

CCSAUS: Class I, Division I Groups A B C D, T4

FM: Class I, Division 1, Groups A B C D, T4

TC TR EX-Certificate: 0Ex ia IIC T4 Ga (–20°C to +70°C)
Russian Pattern Approval Russia (GOST-R), Kazakhstan (GOST-K)
Canadian Pressure Vessel Certification C.R.N. — 11 Canadian provinces
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 1.27kg
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-EX1.50P
KFD0-CS-EX2.50P
KFD2-STC4-EX1.H
MTL5041, MTL5040

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