Dew-Point Transmitters
Easidew Transmitters
Industrial Dew-Point Transmitters
Simple to install and maintain, the Easidew transmitter series measures dew point and moisture
content and is available with a range of process connections and electrical connectors. The Easidew
I.S. transmitter has global intrinsically safe certications and all Easidew models are available with
service exchange program which reduces the cost of maintenance.
Highlights
• Measurement ranges -110 up to +20°Cdp
• Dew point or ppmV moisture content output
• 2-wire loop power connection
• Accuracy ±2°Cdp
• Traceable calibration certicate
• Easidew I.S. IECEx, cCSAus, FM and ATEX 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 ange
• MiniDIN 43650, M12 electrical connectors
• Oxygen Service cleaned
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Applications
• Compressed air Class 1 to Class 6 dryers
• Breathing air
• Hydrogen coolant
• Inert and bulk gases
• Glove boxes
• Welding gases
• Hazardous areas
• Oxygen purity
Dew-Point Transmitters
Easidew Transmitters
The Universal Moisture Transmitter
The Easidew transmitter has a wide measurement range
from -110 to +20°Cdp and one stocked product can be used
across all class 1 to class 6 industrial dryer applications.
The Easidew family of industrial transmitters incorporates
the latest Michell advanced ceramic technology providing
stable, reliable and repeatable moisture measurements for
all dew point applications.
Ease of Installation
Flexible product design ensures the unit can be quickly and
economically installed.
• Mini DIN 43650 form C or M12 5 pin electrical
connectors
• 5/8” UNF, 3/4” UNF, G1/2” BSP process connections
• KF40 Glove Box type ange process connection
• 316 stainless steel transmitter sample blocks
• On site conguration and diagnostic communication tool
Service Exchange/Recalibration
Program
Michell oers 2 services for customers who want minimum
downtime and sensor traceability, while maintaining the
reliability of their system:
• Sensor Exchange - Customers place an order for a
guaranteed, reconditioned sensor. When this arrives,
they exchange it for the installed sensor which is
returned to Michell, resulting in zero process downtime.
• Recalibration - Customers return their installed sensor
to Michell, where they are inspected, checked and recalibrated before being returned. This provides on-going
sensor traceability for the process.
Safety and Integrity
The mechanical design considers the health and safety quality
requirements of the end user, oering an ultra-high process
pressure barrier, along with meticulous levels of product
traceability and quality.
• High performance 450 bar process media barrier
• Optional gas wetted parts BS EN 10204 3.1 material
certied
• Optional cleaning for enriched oxygen service
• 13 point calibration certicate
Measurement Performance
The transmitter uses Michell’s market leading ceramic
measurement technology coupled with the latest generation,
sophisticated microcontroller electronics to provide accurate
and stable measurement across the transmitters product life.
• Accuracy ±2°Cdp
• Fast response to moisture changes
Flexibility of Ownership
The Easidew transmitter has a RS485 communication
system, which gives customers the opportunity to re-range
and re-scale with a communication kit for a wide variety of
moisture measurements.
• Re-ranging 4–20 mA within the –110 to +20°Cdp range
• Moisture scaling — dew point, ppm
V
Speed of Supply
The transmitter is manufactured within Michell’s worldleading high-volume moisture transmitter manufacturing
centre in the United Kingdom, which ensures reliability and
repeatability of delivery and eld supported by a network of
Michell’s global service centres.
Global Certications
The Easidew series has a broad range of certications to
ensure a single stocked unit can be used in any global
application.
• Easidew I.S. - ATEX & IECEx
• Easidew I.S. - cCSAus (US and Canada) & FM
• Easidew I.S. - EX-TC TR
• Easidew - UL approval
• All Easidews - Canadian pressure vessel approved (CRN)
Michell has a large team of experienced eld and factory
based application engineers who are available to assist with
any dew point sensor application.
• Calibration manufacturing system is traceable to
globally recognized NPL and NIST ISO 17025 standards
Installation Accessories
Transmitters are available with a range of practical accessories.
• 5/8” UNF, 3/4” UNF, G1/2” BSP Sample blocks
• Compact simple sample systems
• Process connection adaptors
Customization
If your application requires a customized sensor, we have
specialized design and manufacturing capability to cover your
requirements.
www.michell.com
Dew-Point Transmitters
Technical Specications
Product Easidew, Easidew M12 and Easidew 34
Transmitter
Performance Specications
Measurement Range –110 to +20°C dew point; –100 to +20°C dew point; non standard ranges available on request
Accuracy ±2°C dew point*
Response Time 5 mins to T95 (dry to wet)
Repeatability 0.5°C dew point
Calibration Traceable 13 point calibration certicate
Electrical Specications
Output Signal
Output Dew point or moisture content
Analog Output Scaled Range Dew point: -110 up to +20°C; Moisture content in gas: 0– up to 3000 ppm
Supply Voltage 12 to 28 V DC
Load Resistance Max 250 Ω @ 14 V (500 Ω @ 24 V)
Current Consumption 23 mA max, depending on output signal
CE Conformity Approved
UL61010-1 & CAN/CSA C22.2 No. 61010-1
4–20 mA (2-wire connection, current source); User congurable over range
Easidew M12: Modbus RTU over RS485
Operating Specications
Operating Temperature -40 to +60°C
Compensated Temperature Range -20 to +50°C
Storage Temperature -40 to +60°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
Mechanical Specications
Ingress Protection
Intrinsically Safe Area Certicates
Oxygen Service
Housing Material 316 stainless steel
Dimensions
Filter (Sensor Protection)
Easidew: 5/8” - 18 UNF
Process Connection
KF40 Flange Accessories Flange for 5/8” 18 UNF & 3/4” 16 UNF process connections
Weight 150g
Electrical Connections
Mating Electrical Connectors
Diagnostic Conditions
(factory programmed)
Approved Galvanic Isolators
NOTES * Over Compensated Temperature Range
Easidew 34: 3/4” - 16 UNF
Easidew M12: 5/8” - 18 UNF, 3/4” - 16 UNF, G1/2”
BSP
Easidew: MiniDIN 43650 form C
Easidew M12: M12 5 Pin (A coded)
IP66 in accordance with standard BS EN 60529:1992; NEMA 4 protection in accordance
MiniDIN 43650 form C L=132mm x ø45mm (with connector cable)
Easidew M12: M12 5 pin L = 155mm x ø45mm (with connector cable)
Optional: 316 stainless steel sintered guard <80µm
Easidew M12: optional 0.8, 2, 5 metre M12 A coded connector/cable available
with standard NEMA 250–2003
Easidew M12: IP65
ATEX: II 1 G Ex ia IIC T4 Ga (-20 to +70 °C)
IECEx: EX ia IIC T4 Ga (-20 to +70 °C)
TC TR@ 0Ex ia IICT4 Ga (-20 to +70 °C)
FM: Class I, Division 1, Groups A B C D, T4
CSAUS: Class I, Division 1, Groups A B C D, T4
C
Optional: Cleaned for enriched oxygen service
Standard: HDPE <10µm
5/8” - 18 UNF, 3/4” - 16 UNF, G1/2” BSP
MiniDin 43650 form C
Mating connector supplied as standard
Sensor fault: 23 mA
Under-range dew point: 4 mA
Over-range dew point: 20 mA
KFD2-CR-EX1.20200
KFD2-CR-EX1.30200
KFD0-CS-EX1.50P
KFD0-CS-EX2.50P
KFD2-STC4-EX1.H
MTL5041
MTL5040
Easidew I.S. Transmitter
V;
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Dew-Point Transmitters
27 A/F
13.0 0.512
46.0 1.811
60.3 2.374
12.7 0.500
8.0 0.315
27.0 1.063
O
5/8" UNF THREAD
BONDED SEAL
M12 5-WAY
A CODED
27.0 1.063 A/F
DIMENSIONS IN mm [INCHES]
13.0 0.512
46.0 1.811 60.3 2.374 12.7 0.500
8.0 0.315
27.0 1.063
O
G1/2 THREAD
BONDED SEAL
M12 5-WAY
A CODED
27.0 1.063 A/F
DIMENSIONS IN mm [INCHES]
13.0 0.512
44.0 1.732 62.3 2.453 12.7 0.500
10.0 0.394
27.0 1.063
O
3/4" UNF THREAD
O-RING SEAL
M12 5-WAY
A CODED
27.0 1.063 A/F
DIMENSIONS IN mm [INCHES]
Easidew Transmitters
Product Dimensions
Easidew & Easidew I.S. Easidew M12
5/8” Bonded Seal
ø25.4 x 2mm
(ø1 x 0.07”)
27mm
(1.06”)
A/F
45mm
(1.77”)
10mm
(0.39”)
132mm
ø27mm
(1.06”)
(5.19”)
10mm
(0.39”)
46mm
(1.81”)
5/8” UNF
46mm
(1.81”)
G1/2” BSP
46mm
(1.81”)
3/4” UNF
G1/2” BSP Bonded Seal
ø28.65 x 2.61mm
(ø1.12 x 0.10”)
3/4” O-Ring
ø18.72 x 2.62mm
(ø0.75 x 0.09”)
10mm
(0.39”)
10mm
(0.39”)
132mm
ø27mm
(1.06”)
132mm
ø27mm
(1.06”)
(5.19”)
(5.19”)
10mm
(0.39”)
10mm
(0.39”)
Related Process Products
27mm
(1.06”)
A/F
27mm
(1.06”)
A/F
45mm
(1.77”)
45mm
(1.77”)
1/8” NPT
30mm
1/8” NPT
(see accessories and spare parts)
55.2mm
Optional Sample Block
5/8”-18 UNF
3/4” UNF
G1/2” BSP
ø30mm
5/8”-18 UNF
3/4” UNF
G1/2” BSP
Michell Instruments 48 Lancaster Way Business Park, Ely, Cambridgeshire, CB6 3NW
Tel: +44 (0) 1353 658000, Fax: +44 (0) 1353 658199, Email: info@michell.com, Web: www.michell.com/uk
Michell Instruments adopts a continuous development programme which sometimes necessitates specication changes without notice.
Issue no: Easidew Transmitters_ 97554_V3_UK_0220
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