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Process Moisture Analyzer - Michell Promet I.S

Updated:2025-03-13

Brand: PST/Michell
Model: Promet I.S
Description: Promet I.S. Process Moisture Analyzers are heavy duty, industrial hygrometer systems for measurement of high pressure, process gases and vaporized liquids on natural gas platforms and terminals, petro
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Product Details

Process Moisture Analyzer - Michell Promet I.S Description：

Product Manual Datasheet

Multi-Channel Moisture Measurement in Process Gases

Features

Simple, cost-efficient operation and low maintenance

Immune to chemical attack from H2S, mercaptans and other sulphides

Protected against glycol or other liquid contaminants

Accurate direct dew-point measurement at process pressure up to 45 MPa (450 barg/6526.7 psig)

Moisture range from ambient to ppb level with exhaustive list of hygrometric units, including key parameters of natural gas

Three 4...20 mA configurable outputs and digital Modbus RTU-based communication

Assured calibration integrity traceable to NPL (UK) and NIST (USA)

User programmable or real-time active pressure compensation for moisture content calculation

Multi-channel with up to 4 independent measurement channels

Customer configurable ES70 sample systems

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

Promet I.S. Process Moisture Analyzers are heavy duty, industrial hygrometer systems for measurement of high pressure, process gases and vaporized liquids on natural gas platforms and terminals, petrochemical plants and industrial gas manufacturing facilities. Promet I.S. combines Michell’s proven Ceramic Metal-Oxide Moisture Sensor with ES70 sample conditioning systems to provide a reliable and easy to operate, multi-channel on-line instrument for both flammable and non-flammable gases. Optional Oxygen Electrochemical sensors offer additional capability for percentage and ppmV O2 measurements.

Single or multichannel configurations are available. The Control Unit in the multi-channel format can also include moisture in liquid analysis or oxygen measurement function by combining with the Liquidew I.S. Moisture in Liquid Analyzer or the Minox-i O2 transmitter

Specifications

Sensors
Sensor Technology	Michell Ceramic Metal-Oxide Moisture Sensor
Sensor Version	Easidew PRO I.S.
Measurement Range	-100...+20°C (-148...+68 °F) dew point
Calibration Range	-100...+20°C (-148...+68 °F) dew point
Calibration	Traceable to British (NPL) and American (NIST) National Humidity Standards
Accuracy	Dew point: ±1 °C (1.8 °F) between -60 and +20 °C (-76 and +68 °F) dp Moisture content: ±10 % of reading Dew point: ±2 °C (3.6 °F) between -60.1 and -100 °C (-76.18 and -148 °F) dp
Resolution	0.1 °C (0.18 °F) between +20 and -100 °C (+68 and -148 °F) dp
Analysis Pressure	Up to 45 MPa (450 barg/6526.7 psig)
Operating Temperature	-40...+60 °C (-40...+140 °F)
Sample Flow Rate	1...5 l/min
Optional Pressure Sensor	0...138 barg (0...2001 psig) (other ranges available) Accuracy: ±0.25 % FS
Certification
Hazardous Area Certification	ATEX/UKCA: II 1 G Ex ia IIC T4 Ga (-20°C = Ta = +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 pressure
Analog Output	Three 4...20 mA (max load 500 Ω) user-definable outputs
Digital Output	RS485 Modbus RTU
Display Mode	Moisture content (ppm_V) Moisture content in natural gas (ppm_V, lb/MMSCF, mg/m³) Dew point (°C or °F) Temperature (°C or °F) Pressure (psig, barg) % or ppm_V O₂
Pressure Compensation	Fixed value (user programmed) or dynamic input from optional pressure sensor
Display Resolution	0.1°Cdp, 0.1°Fdp, 0.1 - 0.001 ppm_V ideal gas (adjustable), 0.01 ppm_V natural gas, 0.01 mg/m³, 0.01 lb/MMSCF, 1 psig, 0.1 barg 0.01 %/0.5 ppm_V O₂
Alarms	Four alarm relays. Control action and setpoint 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 18...28 V DC, 30 V A max power consumption
Interconnection Cable	General instrument type, twisted pair, screened, single pair (two pairs with pressure sensor)
Enclosure	19" sub rack unit Dimensions 132 x 483 x 375 mm (5.2 x 19.01 x 14.76”) (h x w x d) (100 mm/4” min. clearance depth for cables and vents)
Operating Environment	Indoor, safe area, 0...+50 °C (32...+122 °F), <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 (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, 47/63 Hz Power consumption 100 W max
Operating Environment	Shaded position, on or off shore, -20...+50 °C (-4...+122 °F) (-40...+60 °C/-40...+140 °F max. transient) Enclosure cooling option recommended for climatic ambient > +45 °C (113 °F)