Michell Instruments

PT-MON Explosion proof moisture analyzer

A complete explosion proof moisture analyzer for critical gas process applications

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PT MON Explosion proof moisture analyzer 14221

 Promet EExd Process Moisture Analyzers 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. 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.

• EExd flameproof certified - IECEx, ATEX, CCSAUS 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 ppmV
Moisture ContentAutomatic pressure compensated conversions: ppmV 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 Pressurebarg, MPa and psig
Sensor TechnologyMichell Ceramic Moistures Sensor
Measuring Range-120°Cdp to +30°Cdp
1 ppbV to 30,000 ppmV
0 to 250 barg
Calibration Range-100°Cdp to +20°Cdp
10 ppbV to 23,000 ppmV
AccuracyDew 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 Resolution0.1°C: -80 to +20°Cdp
1°C: -100 to -80°Cdp
Display ResolutionDew point: 0.1°C
Moisture content: autoscale, 5 digits
MPa and barg: 0.1, psig: 1.0
Resolution0.1°C between +20 and -80°Cdp
1°C between -80 and -100°Cdp
Temperature CoefficientAlgorithm compensation (-20 to +50°C)
HMI; Keyboard InterfaceCapacitive touch-screen through glass
DisplayVacuum florescent
Data LoggingsA 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 OutputTwo 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 EnclosureInternal temperature control for condensation protection and stable analysis conditions
TypeFlameproof EExd
ConstructionCast copper-free aluminium
FinishChromate primer, Polyester P9010 powder coated (black). Meets BS3900
Operating PressureMax 138 barg (2000 psig)
Sample Connections1/8” NPT (ATEX / IECEx) or 1/4” NPT (CSA)(female)
Sample Flow Rate0.5 to 5 I/min
Sample Flow AlarmOptional
Power Supply90 to 260 V AC, 50/60 Hz, 180 W Main Unit
Operating EnvironmentIndoor/Outdoor -20°C to +60°C
Max 95% RH Shaded location
Certification
Hazardous Area CertificationATEX: 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 ApprovalGOST-R, GOST-K
Channel ConfiurationsSingle and two channel
Moisture ParametersDew point °C and °F

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