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Process Moisture Analyzer - Michell Promet EExd

Updated:2025-03-13

Brand: PST/Michell
Model: Promet EExd
Description: Promet EExd Process Moisture Analyzers are hazardous-area rated industrial hygrometer systems for measurement of water vapor content in process gases on natural gas platforms and terminals as well as
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Product Details

Process Moisture Analyzer - Michell Promet EExd Description：

Product Manual Datasheet

Natural Gas Water Dew-Point Analyzer

Features

EExd flameproof certified - IECEx, ATEX, UKCA, cQPSus and TR CU Ex

Complete hazardous area installation

Single- or dual-channel measurement

Moisture content, dew point and pressure

Calibration traceable to NPL (UK) and NIST (USA)

Range -120...+30°Cdp (-184...+86°F), 0.001...30,000 ppmV

Remote global access options

Sour gas compatible

Field calibration maintenance

Promet EExd Process Moisture Analyzers are hazardous-area rated industrial hygrometer systems for measurement of water vapor content in process gases on natural gas platforms and terminals as well as in petrochemical plants and industrial manufacturing facilities.

The Promet EExd is installed directly in the hazardous area, simplifying site installation and retrofits. Promet EExd combines proven Michell moisture sensing technologies with sample conditioning systems designed to provide a reliable and easy-to-operate, multi-channel, on-line instrument for moisture measurement in flammable gases.

Specifications

Channel Configurations	Single and two channel
Moisture Parameters	Dew point °C and °F
Moisture Content	Automatic pressure compensated conversions: ppm_V for natural gas and ideal gas lb/mmscf and mg-m-₃ for natural gas Dew point at a pressure input by the user for natural gas and ideal gas. Calculations for natural gas moisture content based on either IS0 18453 or IGT#8 to customer order preference.
Analysis Pressure	barg, MPa and psig
Sensor Technology	Michell Ceramic Metal-Oxide Moisture Sensor
Measurement Range	-120oC dp...+30oC dp (-184...+86 °F) 1 ppb_V...30,000 ppm_V 0...250 barg (0...3625 psig)
Calibration Range	-100 °C dp...+20 °C dp (-148 °F dp...+68 °F dp) 10 ppb_V...23,000 ppm_V
Accuracy	Dew point: ±1 °C between –59.9 & +20 °C dp (±1.8 °F between -75.8 & 68 °F dp) Moisture content: ±10 % of reading Dew point: ±2 °C between –60 & -100 °C dp (±3.6 °F between -76 & -148 °F dp) Moisture content: ±20 % of reading Analysis Pressure: ±0.25 % FS.
Measured Resolution	0.1 °C (0.18 °F): –80...+20 °C dp (-112...+68 °F) 1 °C (1.8 °F): –100...-80 °C dp (-148...-112 °F)
Displayed Resolution	Dew point: 0.1 °C (0.18 °F) Moisture content: autoscale, 5 digits MPa and BarG: 0.1, psig: 1.0
Resolution	0.1 °C between +20 °C dp and -80 °C dp (0.18 °F between +68 and -112 °F dp) 1 °C between -80 °C dp and -100 °C dp (1.8 °F between -112 and -148 °F dp)
Temperature Coefficient	Algorithm compensation (-20...+50 °C)
HMI: Keyboard Interface	Capacitive touch-screen through glass
Display	Vacuum fluorescent
Datalogging	A rolling maximum of 150 data logs is available. Each log records time, date, moisture and pressure values for each channel. 5 minutes minimum and 60 minutes maximum logging intervals can be set by the user
Communications and Output	Two non-isolated 4...20 mA per measurement channel. 500 Ω maximum load. Range and parameter settable by user. Modbus RTU @ 9600 baud-rate Alarms: two volt free contacts per channel; one process value and one instrument status. Also available via Modbus communications
Main Unit Enclosure	Internal temperature control for condensation protection and stable analysis conditions
Type	Explosionproof NEC/Flameproof EExd
Construction	Cast copper-free aluminium
Finish	Chromate primer, Polyester P9010 powder coated (black). Meets BS3900
Operating Pressure	30...138 barg (435...2000 psig)*
Sample Connections	1/8” NPT (F)
Sample Flow Rate	1 Nl/min (Nm³/hr) (2.1 scfh)
Sample Flow Alarm	Optional
Power Supply	90...260 V AC, 50/60 Hz, 180 W Main Unit
Operating Environment	Indoor/Outdoor -20 °C...+60 °C (-4...+140 °F) Max 95 % rh. Shaded location
Certification
Hazardous Area Certification	ATEX/UKCA: II 2 G Ex db IIB+H2 Gb T5 (Tamb -40 °C...+44 °C) – 60 barg max. T4 (Tamb -40 °C...+60 °C) – 60 barg max. T3 (Tamb -40 °C...+60 °C) – 138 barg max. IECEx: Ex db IIB+H2 Gb T5 (Tamb -40 °C...+44 °C) – 60 barg max. T4 (Tamb -40 °C...+60 °C) – 60 barg max. T3 (Tamb -40 °C...+60 °C) – 138 barg max. cQPSus: Class I, Division 1 Groups B, C & D T5 (Tamb -25 °C...+44 °C) – 60 barg max. T4 (Tamb -25 °C...+60 °C) – 60 barg max. T3 (Tamb -25 °C...+60 °C) – 138 barg max. CL I ZONE 1: Ex db IIB+H2 Gb AEx db IIB+H2 Gb T5 (Tamb -40 °C...+44 °C) – 60 barg max. T4 (Tamb -40 °C...+60 °C) _ 60 barg max. T3 (Tamb -40 °C...+60 °C) – 138 barg max.
Additional	TRCU 012 (EAC), PESO (India), KCS (Korea), Ukraine Ex
Pattern Approval	GOST-R, GOST-K
*Other variants available to customer specific order – consult Michell Instruments