current position:home page>Products>Analysis Instrument>PST>

Moisture in Liquid Analyzer - Michell Liquidew I.S.

Updated:2025-03-13

Brand: PST/Michell
Model: Liquidew I.S.
Description: Intrinsically safe moisture in liquids analyzer for fast, reliable on-line measurements. Continuous online measurement allows monitoring and control of processes to maximise efficiency for production
Data download

Feedback
WeChat

QQ

Online Service

Product Details

Moisture in Liquid Analyzer - Michell Liquidew I.S. Description：

Product Manual Datasheet

For Moisture Measurement in Process Liquids

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

Three 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

Optional, highly reliable and cost-effective 2-wire, loop-powered O2 transmitter

Intrinsically safe moisture in liquids analyzer for fast, reliable on-line measurements. Continuous online measurement allows monitoring and control of processes to maximise efficiency for production and maintenance.

Based on the Michell Ceramic Metal-Oxide Moisture Sensor, Liquidew I.S. measures trace moisture in a wide variety of non-polar liquids. It is fully certified for use in hazardous areas and typical applications include control of moisture for petroleum refineries and petrochemical processing. Optional Oxygen Electrochemical sensors offer additional capability for percentage and ppmV O2 measurements.

The control unit in the multi-channel format can also include a moisture in gas analysis or oxygen measurement function by combining with the Promet I.S. Moisture in Gas Analyzer or the Minox-i O2 transmitter.

Specifications

Sensor
Sensor Technology	Michell Ceramic Metal-Oxide Moisture Sensor
Sensor Version	Easidew PRO I.S
Measurement Range	0.001...1000 ppm_w Higher range on request, actual range dependent on solubility of sample fluid
Calibration Range	-100...+20 °Cdp (-148...+68 °Fdp)
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...+70 °C (-4...+158 °F)
Temperature Measurement Accuracy	± 0.2°C (± 0.36 °F)
Analysis Pressure	Up to 5 MPa (50 barg/725 psig)
Analysis Temperature	0...+50 °C (32...+122 °F)
Sample Flow Rate	Min 0.01 l/min Max 10 l/min 0.1...0.3 l/min recommended
Calibration	Traceable to British (NPL) and American (NIST) National Humidity Standards
Certification
Hazardous area certification	ATEX/UKCA II 1 G Ex ia IIC T4 Ga (–20°C...+70°C) IECEx Ex ia IIC T4 Ga (–20°C...+70°C) TR CU 0Ex ia IIC T4 Ga (–20°C...+70°C) cQPSus IS, Class I, Division 1, Groups A, B, C & D, T4 Class I, Zone 0, AEx ia IIC T4 Ga, Ex ia IIC T4 Ga Tamb +70 °C
Pattern Approval	GOST-R, GOST-K
Control Unit
Display	2.8” color touch screen LCD, displaying moisture content / dew point or O₂ and analysis temperature
Analog Output	Three 4...20 mA (max load 500 Ω) user-definable outputs
Digital Output	RS485 Modbus RTU
Display Mode	Moisture content (ppm_w) Dew point (°C or °F) Temperature (°C or °F) % or ppm_V O₂
Display Resolution	0.1°Cdp, 0.1°Fdp, 0.001 ppm_w, 0.1°C temp 0.01 %/0.5 ppm_V O₂
Alarms	Four alarm relays. Control action and set-point are user programmable Two Form C contacts rated 30 V DC, 5 A. Non-inductive load Two Form A contacts rated 30 V DC, 5 A. 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 30 V A max power consumption
Enclosure	19" sub rack unit Dimensions 132 x 483 x 375mm (5.2 x 19.01 x 14.76”) (h x w x d) (100 mm/4” minimum clearance depth for cables and vents)
Operating Environment	Indoor, safe area, 0...+50 °C (32...+122 °F), < 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 (31.5 x 23.62 x 11.81”) (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 (+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...+40 °C (-4...+140 °F) (-40...+60 °C/-40...+140 °F max transient) Enclosure cooling option recommended for climate ambient > +45 °C (113 °F)
Sample Cooling Option	Recommended for process fluid temperatures > +40 °C (+104 °F) Plant water supply required ≤ +30 °C (+86 °F)