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Michell Instruments - Michell Process Gas Moisture Analyzer | Promet EExd

Supplier: AMS Instrumentation & Calibration

Michell Process Gas Moisture Analyzer | Promet EExd

Are hazardous-area rated industrial hygrometer systems for measurement of water vapor content in low and high pressure process gases on natural gas platforms and terminals as well as in petrochemical plants and industrial manufacturing facilities.

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The Promet EExd is installed directly in the hazardous area, simplifying site installation and retrofits. Promet EExd combines the latest 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.

Features:

EExd flameproof certified - IECEx, ATEX, _CCSA_US and TC TR Ex
Complete hazardous area installation
Single- or dual-channel measurement
Moisture content, dew point and pressure
Calibration traceable to NPL (UK) and NIST (USA)
Remote global access options
Sour gas compatible
Field calibration maintenance
Range -120 to +30°Cdp, 0.001 to 30,000 ppm_V

Technical Specification

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, lbs/MMscf and mg/m³ 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 Moisture Sensor
Measurement Range	-120°Cdp to +30°Cdp 1 ppb_V to 30,000 ppm_V 0 to 250 barg
Calibration Range	-100°Cdp to +20°Cdp 10 ppb_V to 23,000 ppm_V
Accuracy	Dew point: ±1°C between -59.9 & +20°Cdp Moisture content: ±10% of reading Dew point: ±2°C between -60 & -100°Cdp Moisture content: ±20% of reading Analysis Pressure: ±0.25% FS
Measured Resolution	0.1°C: -80 to +20°Cdp 1°C: -100 to -80°Cdp
Displayed Resolution	Dew point: 0.1°C Moisture content: autoscale, 5 digits MPa and barg: 0.1, psig: 1.0
Resolution	0.1°C between +20 and -80°Cdp 1°C between -80 and -100°Cdp
Temperature Coefficient	Algorithm compensation (-20 to +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 O 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	Flameproof EExd
Construction	Cast copper-free aluminium
Finish	Chromate primer, Polyester P9010 powder coated (black). Meets BS3900
Operating Pressure	Max 138 barg (2000 psig)
Sample Connections	1/8” NPT (ATEX / IECEx) or 1/4” NPT (CSA)(female)
Sample Flow Rate	0.5 to 5 l/min
Sample Flow Alarm	Optional
Power Supply	90 to 260 V AC, 50/60 Hz, 180 W Main Unit
Operating Environment	Indoor/Outdoor -20°C to +60°C Max 95% RH Shaded location
Certification
Hazardous Area Certification	ATEX: II 2G Ex d IIB + H2 Gb T5 (-40°C to +44°C) T4 (-40°C to +60°C) IECEx: Ex d IIB + H2 Gb T5 (-40°C to +44°C) T4 (-40°C to +60°C) cSAus: Class I, Division 1, Group B, C, D, T4 Tamb -40°C to +60°C *TC TR: Ex 1Ex d IIB + H2 T4, T3 Gb (-40°C to +60°C)
Pattern Approval	GOST-R, GOST-K

Technical Specification

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, lbs/MMscf and mg/m³ 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 Moisture Sensor
Measurement Range	-120°Cdp to +30°Cdp 1 ppb_V to 30,000 ppm_V 0 to 250 barg
Calibration Range	-100°Cdp to +20°Cdp 10 ppb_V to 23,000 ppm_V
Accuracy	Dew point: ±1°C between -59.9 & +20°Cdp Moisture content: ±10% of reading Dew point: ±2°C between -60 & -100°Cdp Moisture content: ±20% of reading Analysis Pressure: ±0.25% FS
Measured Resolution	0.1°C: -80 to +20°Cdp 1°C: -100 to -80°Cdp
Displayed Resolution	Dew point: 0.1°C Moisture content: autoscale, 5 digits MPa and barg: 0.1, psig: 1.0
Resolution	0.1°C between +20 and -80°Cdp 1°C between -80 and -100°Cdp
Temperature Coefficient	Algorithm compensation (-20 to +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 O 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	Flameproof EExd
Construction	Cast copper-free aluminium
Finish	Chromate primer, Polyester P9010 powder coated (black). Meets BS3900
Operating Pressure	Max 138 barg (2000 psig)
Sample Connections	1/8” NPT (ATEX / IECEx) or 1/4” NPT (CSA)(female)
Sample Flow Rate	0.5 to 5 l/min
Sample Flow Alarm	Optional
Power Supply	90 to 260 V AC, 50/60 Hz, 180 W Main Unit
Operating Environment	Indoor/Outdoor -20°C to +60°C Max 95% RH Shaded location
Certification
Hazardous Area Certification	ATEX: II 2G Ex d IIB + H2 Gb T5 (-40°C to +44°C) T4 (-40°C to +60°C) IECEx: Ex d IIB + H2 Gb T5 (-40°C to +44°C) T4 (-40°C to +60°C) cSAus: Class I, Division 1, Group B, C, D, T4 Tamb -40°C to +60°C *TC TR: Ex 1Ex d IIB + H2 T4, T3 Gb (-40°C to +60°C)
Pattern Approval	GOST-R, GOST-K

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AI Overview BETA

The Michell Instruments Promet EExd is an industrial hygrometer that measures water vapour content in low- and high-pressure process gases. Its EExd flameproof design allows direct installation in a hazardous area, simplifying site installation and retrofit work. Natural gas platforms and terminals, petrochemical plants and industrial manufacturers get moisture measurements with calibration traceable to NPL in the UK and NIST in the USA.

Michell Ceramic Moisture Sensor
Dew-point range: -120°Cdp to +30°Cdp; moisture: 1 ppb V to 30,000 ppm V
Maximum operating pressure: 138 barg
Sample flow rate: 0.5 to 5 l/min
Hazardous-area approvals: ATEX, IECEx, CSA US and TC TR Ex

Source: listing by AMS Instrumentation & Calibration on IndustrySearch · Updated 28 Oct 2026

AI Overview is generated by artificial intelligence and may contain mistakes.

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Supplier

Supplier: AMS Instrumentation & Calibration

Distribution: Australia, New Zealand, Pacific Islands

Location: Boronia, VIC

Customers: BHP, Santos, Shell, Australian Navy, Coca Cola, CSL, ANSTO, Rio Tinto, FMG, Oil Search

Trade With Confidence. The supplier of this item is approved as a Verified Supplier. Business registration, contact details and locations have been verified. AMS Instrumentation & Calibration are also proudly displaying these credentials:

Established:

1973

Employees:

21-50

Customers:

BHP, Santos, Shell, Australian Navy, Coca Cola, CSL, ANSTO, Rio Tinto, FMG, Oil Search

Memberships:

IICA, Metrology MSA, ISA

Certifications:

ISO9001

Distribution:

Australia, New Zealand, Pacific Islands