Product guide
23
Humidity and Dew-Point Instruments
Please note: Michell Instruments adopts a continuous development program which sometimes
necessitates specifi cation changes without notice. Please contact us for latest version.
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Precision Manufacturing
Issue No: Easidew Transmitter_97166_V2.1_UK_1111
Easidew Transmitter
2-Wire Dew-Point Transmitter
The Easidew Transmitter is designed for ease of use,
incorporating all the features needed to make installation
and operation as simple as possible. For the fi rst time, dew-
point measurement is made as accessible as temperature
and pressure with this fully confi gured, calibrated transmitter
that can be instantly incorporated into your air or gas
management and control system.
Highlights
• 2-wire loop powered connection
• Dew point or ppm moisture content
• IP66 (NEMA 4)
• Excellent sensor protection
• Measurement range -100 to +20°C (-148 to +68°F)
• Operating temperature -40 to +60°C (-40 to +140°F)
• Fast response
Technical Specifi cations
Performance
Measurement range (dp) -100 to +20°C (-148 to +68°F) dew point
Accuracy (dp) ±2°C (±3.6°F) dew point
Response time 5 mins to T95 (dry to wet)
Repeatability 0.5°C (0.9°F) dew point
Electrical output/input
Output signal 4-20 mA (2-wire connection, current source)
User confi gurable over range
Output Dew point, moisture content for ppm
V
Output range Dew point: -100 to +20°C (-148 to +68°F)
Moisture content in gas: 0-3000 ppm
V
Supply voltage 12-28 VDC
Load resistance Max 250 @ 12 V (500 @ 24 V)
Current consumption 20 mA max
Operating conditions
Operating humidity 0–100% RH
Operating temperature -40 to +60°C (-40 to +140°F)
Operating pressure 45 MPa (450 barg / 6500 psig) max
Flow rate 1 to 5 Nl/min (2.1 to 10.6 scfh) mounted in
standard sampling block; 0 to 10 m/sec
(0 to 32.8 fps) direct insertion
Temperature coeffi cient Temp compensated across operating temp range
Mechanical specifi cation
Ingress protection IP66 in accordance with standard
BS EN 60529:1992, and
NEMA 4 in protection accordance with standard
NEMA 250-2003
Housing material Stainless steel
Dimensions L=132mm x ø27mm (L=5.19” x ø1.00”)
Filter HDPE Guard <10m (80m sint guard optional)
Mounting Thread 5/8” - 18 UNF
Weight 150g (5.29oz)
Electrical connections See table
Interchangeability Fully interchangeable transmitter
Diagnostic conditions
(factory programmed)
Condition
Sensor fault
Under-range dew point
Over-range dew point
Output
23 mA
4 mA
20 mA
Dimensions