Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Updated:2025-03-13
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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 ppmw 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 (ppmw) Dew point (°C or °F) Temperature (°C or °F) % or ppmV O2 |
| Display Resolution |
0.1°Cdp, 0.1°Fdp, 0.001 ppmw, 0.1°C temp 0.01 %/0.5 ppmV 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) |
Suitable Applications
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