Liquidew I.S. Moisture in Liquid Analyzer

On-line measurement of moisture content in liquids is accurate, fast and reliable with the Liquidew I.S. Moisture in Liquid Analyzer from Michell. A wide variety of non-polar liquids can be measured continuously, on-line, including flammable liquids and hazardous area applications, petrochemicals, power industry and pharmaceutical manufacturing.

Product Features

  • Simple, cost-efficient operation and low maintenance
  • Retrofit functionality, easy to integrate into existing sampling or distribution systems
  • High integrity moisture in liquid measurement from 0.01 ppmW to saturation point
  • Multi-channel with up to four completely independent measurement channels
  • Robust design for undisturbed operation in many non-polar liquids over a long time
  • Two 4-20 mA configurable outputs and digital Modbus RTU-based communication
  • Replaceable sensor element with Michell Calibration Exchange Service for reliable cost-efficient calibration
  • NIST and NPL traceable calibration
  • EExd version available
Liquidew I.S.

Liquidew I.S.

Technical Specification

Sensor Technology Michell Ceramic Moisture Sensor
Sensor Version Easidew PRO I.S
Measurement Range 0.001 to 1000 ppmw
Higher range on request, actual range dependent on solubility of sample fluid
Calibration Range -100 to +20°Cdp
Accuracy Dew point: ±1°C between -59.9 and +20°Cdp, (±1.8°F between -75.9 and +68°Fdp)
±2°C between –60 & -100°Cdp,(±3.6°F between -76 and -148°Fdp)
Moisture content: ±10% of reading, ±20% of reading
Resolution 0.1°C between +20 and -100°Cdp
Temperature Measurement Pt100
Temperature Measurement Range -20 to +70°C
Temperature Measurement Accuracy ± 0.2°C
Analysis Pressure Up to 5 MPa (50 barg)
Analysis Temperature 0 to +50°C
Sample Flow Rate Min 0.01 l/min
Max 10 l/min
0.1 to 0.3 l/min recommended
Calibration Traceable to British (NPL) and American (NIST) National Humidity Standards
Hazardous area certification 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)
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
Pattern Approval GOST-R, GOST-K
Control Unit
Display Two line 6-digits LED, displaying moisture content / dew point (user toggle) and temperature
Analogue Output Two 4-20 mA (max load 500 Ω)
User-configured for parameter, unit and range
Digital Output RS485 Modbus RTU
Display Mode Moisture content (ppmw)
Dew point (°C or °F)
Temperature (°C or °F)
Display Resolution 0.1°Cdp, 0.1°Fdp, 0.001 ppmw, 0.1°C temp
Alarms Four alarm relays. Control action and set-point are user-programmable
Two Form C contacts rated 10 A, 240 V AC or 8 A, 24 V DC. Non-inductive load
Two Form A contacts rated 5 A, 240 V AC or 4 A, 24 V DC. Non-inductive load
I.S. Barriers Galvanic isolation type, integrated to Control Unit
Power Supply 85 to 265 V AC, 50/60Hz or 10 to 72 V DC
10 W max power consumption
Enclosure 19" sub rack unit
Dimensions 132 x 483 x 375mm (h x w x d)
100mm minimum clearance depth for cables and vents
Operating Environment Indoor, safe area, 0 to +50°C, < 90% RH
Premium Sampling System
Enclosure 304 stainless steel (EN1.4301) enclosure
Option for complete enclosure in 316 stainless steel (EN1.4401)
All fixtures stainless steel
Galvanised steel internal mounting plate
Open panel version available for indoor installation
Dimensions 800 x 600 x 300mm (h x w x d)
Enclosure Mounting Stainless steel wall mounting brackets
Enclosure Ingress Protection IP66
Enclosure Temperature Control Heater/thermostat options for fixed set-point +20°C or adjustable set-point range 0 to control +50°C
Heater Power Supply 110/120 or 220/240/255 V AC, 50/60 Hz. 
Power consumption 100 W max
Operating Environment Shaded position, on or off shore, -20 to +40°C (-40 to +60°C max transient)
Enclosure cooling option recommended for climate ambient > +50°C
Sample Cooling Option Recommended for process fluid temperatures > +40°C
Plant water supply required ≤ +30°C

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