Dew-Point Transmitters
Easidew PRO I.S.
Intrinsically Safe Moisture Transmitter
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 certifi cations and approvals, it is suitable for natural gas, petrochemical and
refi nery applications.
Highlights
• Measurement range –110 to +20°Cdp
• ATEX, IECEx, CCSAUS, FM, TC TR Ex certifi ed
• Accuracy ±1°Cdp
• 2-wire 4–20 mA output
• Traceable 13-point calibration certifi cate
• 450 barg pressure rating
• Alternative process connections available
• Material certifi cation to BS EN 10204 3.1
• Moisture in gases and liquids
• Service exchange program
• Oxygen Service cleaned
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Applications
• Natural gas production and processing
• Pipeline drying
• Fiscal metering of gas
• LNG production processing and receiving terminals
• Petrochemical process liquids
• Catalyst protection
• Polymer production
• CNG drying
• Metallurgical furnace blanket gas
• Compressed air in hazardous areas
Dew-Point Transmitters
Easidew PRO I.S.
The Durable Intrinsically Safe
Dew-Point Transmitter
The Easidew PRO I.S. is designed to measure moisture in
demanding process and refi nery applications in either gases
or liquids. The transmitter offers a wide measurement
range of –110 to +20°Cdp, is easily integrated into existing
systems and has global certifi cations for use in hazardous
areas.
The unit’s robust housing protects the electronics from
harsh environmental conditions. Based on Michell’s ceramic
moisture sensing technology, 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 consistant lead times.
Ease of Installation
With an industry standard process connection, the Easidew
PRO I.S. is quick to install and easy to maintain.
Installation features:
• 5/8” process connection and G1/2”, 3/4” UNF adaptors
• Electrical connection via M20 gland
• 316 stainless steel transmitter sample block (optional)
• Transmitter mounting bracket (optional)
Global Certifi cations
The Easidew PRO I.S. dew-point transmitter has global
hazardous area certifi cation and traceable calibration to
national standards.
Hazardous area approvals:
• IECEx • ATEX
• CCSAUS (US & Canada) • FM
• TC TR Ex • CRN
Calibration approval:
• UKAS • NIST
Optional cleaning for enriched oxygen service
Moisture in Gases or Liquids
The Easidew PRO I.S. is confi gurable for measuring
moisture in both gases and hydrocarbon liquids.
Moisture in gases
The signal from the dew-point transmitter can be scaled to
parts per million by volume (ppm
area applications.
Measurement in ppm
requires a fi xed pressure input
V
) in gases in hazardous
V
of up to 40 MPa which has to be programmed into the
transmitter to accurately compensate gas stream pressure
(if different than atmospheric) to determine the true ppm
of water vapor in the measurement gas.
Factory programmed standard setting is: 0–3000 ppm
Moisture in liquids
The signal from the dew-point transmitter can be scaled to
parts per million by weight (ppm
area applications.
Measurement in ppmW requires 6-point saturation
constants of the liquid at various temperatures, these need
to be programmed into the transmitter to determine precise
ppmW of water vapor in the measurement liquid.
Factory programmed standard setting: 0–1000 ppm
Factory programmed common liquids:
• Butane • Isobutane • Pentane
• Methane • Propane • Ethane
• 1-Butene • Propylene • Cyclopentane
• Ethylene
) in liquids in hazardous
W
V
.
V
.
W
Flexible Confi guration
The Easidew PRO I.S. can be programmed to the following
standard settings:
• Dew-point range: –110 to +20°Cdp or –100 to
+20°Cdp
• Moisture content: 0–3000 ppm
• Pressure: 0 to 400 barg
• Temperature: °C or °F
• Saturation contant value (factory programmed common
liquids as above)
Non-standard settings are also available and may be
requested at the time of order or alternatively, modifi ed by
using the Easidew PRO I.S. communication kit and software
(see order codes).
or 0–1000 ppm
V
W
Speed of Supply
The transmitter is manufactured within Michell’s worldleading high-volume moisture transmitter manufacturing
center in the United Kingdom, which ensures reliability and
repeatability of delivery and fi eld supported by a network of
Michell’s global service centers.
• Calibration manufacturing system is traceable to NPL
and NIST standards
System Customization
If your application requires a customized sensor solution,
we have a specialized design and manufacturing facility to
cover your requirements.
www.michell.com
Dew-Point Transmitters
Technical Specifi cations
Product Easidew PRO I.S. for Gases Easidew PRO LQ I.S. for Liquids
Performance Specifi cations
Measurement range
Accuracy
Response time 5 mins to T95 (dry to wet)
Repeatability 0.5°C dew point
Calibration Traceable 13-point calibration and certifi cate
–110 to +20°C dew point
–100 to +20°C dew point
±1°C dew point (+20 to –60°C)
±2°C dew point (–60 to –110°C)
Electrical Specifi cations
Output signal 4–20 mA (2-wire connection, current source); User confi gurable over range
Output Dew point or moisture content Moisture content
Analog output scaled
range
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)
CE conformity Approved
Dew point: –110 to +20°C or –100 to +20°C
Moisture content in gas: 0 to 3000 ppm
Non-standard: mg/m3, lbs/MMSCF natural gas
V
Moisture content in liquid: 0 to 1000 ppm
Non-standard available upon request
6-point look-up table for saturation constants up
to 1000 ppmW over the temperature range 0 to
+50°C; saturation constants for 10 common liquids
can be programmed into the Easidew PRO LQ I.S.
via the application software; alternatively the user
can program saturation constants manually
Operating Specifi cations
Operating temperature -40 to +60°C
Compensated Temperature Range
Storage Temperature -40 to +60°C
Operating pressure 45 MPa (450 barg) maximum
Flow rate
NOTE: The transmitter accuracy statement is only valid for the temperature range: -20/+50°C
1 to 5 Nl/min mounted in standard sampling block
0 to 10 m/sec direct insertion
-20 to +50°C
0.1 to 0.3L/min through Easidew sample block
Mechanical Specifi cations
Ingress protection IP66 in accordance with standard BS EN 60529:1992; NEMA 4 protection in accordance with standard NEMA 250-2003
0 to 1000 ppm
0.1 to 1m/s direct insertion
W
W
ATEX: II 1 G Ex ia IIC T4 Ga (–20°C to +70°C)
IECEx: Ex ia IIC T4 Ga (–20°C to +70°C)
Intrinsically safe area certifi cates
Russian pattern approval Russia (GOST-R), Kazakhstan (GOST-K)
Canadian pressure vessel cert C.R.N. — 11 Canadian provinces
Oxygen service Optional: cleaned for enriched oxygen
Housing material 316 stainless steel
Filter (sensor protection)
Process connection and
material
Weight 1.27kg
Electrical connections Screw terminal via female M20 x 1.5mm gland
Diagnostic conditions
(factory programmed)
Approved galvanic isolators
Standard: Stainless steel sintered guard (for protection against fi ne particulate >80μm)
Optional: HDPE guard (for protection against fi ne particulate >10μm)
316 stainless steel 5/8” — 18 UNF with bonded seal, G1/2” and 3/4” UNF adaptors available
(material certifi cate to BS EN 10204 3.1 — see ‘
KFD2-CR-EX1.20200 KFD0-CS-EX2.50P MTL5040 KFD0-CS-EX1.50P
KFD2-CR-EX1.30200 KFD2-STC4-EX1.H MTL5541 MTL5041
TC TR: 0Ex ia IIC T4 Ga (–20°C to +70°C)
FM: Class I, Division 1, Groups A B C D, T4
CCSAUS: Class I, Division I Groups A B C D, T4
accessories and spare parts
Condition Output
Sensor fault 23 mA
Under-range dew point 4 mA
Over-range dew point 20 mA
’ on product order codes)
www.michell.com
Dew-Point Transmitters
Easidew PRO I.S.
Product Dimensions
Easidew PRO I.S.
Easidew PRO I.S. with wall mounting bracket
Optional Sample Block Bonded Seal
Related Process Products
I.S. Field Display
Local monitor
Easidew PRO XP
Explosion Proof
Moisture Transmitter
MDM300 I.S. Portable
Dew-Point Hygrometer
Michell Instruments Ltd, Rotronic Instruments Corp. 135 Engineers Road, Suite 150, Hauppauge NY 11788 Way Business
Tel: 631 427 3898, Email: us.info@michell.com, Web: www.michell.com/us
Michell Instruments adopts a continuous development programme which sometimes necessitates specifi cation changes without notice.
Issue no: Easidew PRO IS_97208_V10_UK_0518
XTP601
Oxygen Analyzer
ES70
Sampling System
© 2018 Michell Instruments
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