Product Description

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

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 (-148 to +68°Fdp)
Accuracy Dew point: ±1°C between -60 and +20°Cdp (±1.8°F between -76 and +68°Fdp)
Moisture content: ±10% of reading
Dew point: ±2°C between -60.1 and -100°Cdp (±3.6°F between -76.1 and -148°Fdp)
Resolution 0.1°C between +20 and -100°Cdp (0.18°F between +68 and -148°Fdp)
Temperature measurement Pt100
Temperature measurement range -20 to +70°C (-4 and 158°F)
Temperature measurement accuracy ±0.3°C @ 0°C (±0.54°F @ 32°F)
Analysis pressure Up to 5 MPa (725 psi)
Analysis temperature 0 to +50°C (+32 to 122°F)
Sample flow rate Min 0.01 l/min, max. 10 l/min
0.1 to 0.3 l/min recommended (Min 0.02 scfh, max 21.19 scfh 0.21 to 0.64 scfh recommended)
Calibration Traceable to British (NPL) and American (NIST) National Humidity Standards
Certification
Hazardous Area Certification ATEX – II 1 G Ex ia IIC T4 Ga (-20°C = Ta = +70°C)
FM – IS / I / 1 / ABCD / T4 Ta = +70°C
CSA – IS Class I Div 1 Groups ABCD T4 +70°C
IECEx – Ex ia IIC T4 Ga (-20°C = Ta = +70°C)
GOST Ex
Pattern Approval GOST-R, GOST-K
Control Unit
Display Two line 6-digits LED, displaying moisture content / dew point (user toggle) and temperature
Analog 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 setpoint 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 85-265 V AC 50/60Hz or 10-72 V DC 10 W max. power consumption
Enclosure 19″ sub rack unit Dimensions 132 x 483 x 375mm (h x w x d) (5.2 x 19.02 x 10.08 in) (100mm (3.94 in) minimum clearance depth for cables and vents)
Operating environment Indoor, safe area, 0 to +50°C, < 90% RH
Premium Sampling Systems
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) (31.5 x 23.62 x 11.81 in)
Enclosure mounting Stainless steel wall mounting brackets
Enclosure ingress protection IP66
Enclosure temperature control Heater/thermostat options for fixed set-point +20°C (+68°F)
or adjustable set-point range 0 to control 50°C (32 to control 122°F)
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 (32 to +122°F), < 90% RH
Sample cooling option Recommended for process fluid temperatures > +40°C (+104°F)
Plant water supply required, ≤ +30°C (+86°F)

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