Promet I.S. Process Moisture Analyzer

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 the latest Michell moisture sensing technologies with sample conditioning system design engineering capabilities to provide a reliable and easy to operate, multi-channel on-line instrument for both flammable and non-flammable gases.

Product 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 40 MPa
• Moisture range from ambient to ppb level with exhaustive list of hygrometric units, including key parameters of natural gas
• Two 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
• Multichannel with up to 4 independent measurement channels

Technical Specification

Sensors
Sensor Technology	Michell Ceramic Moisture Sensor
Sensor version	Easidew PRO I.S.
Measurement range	-100 to +20°Cdp (-148 to +68°F)
Calibration range	-100 to +20°Cdp (-148 to +68°F)
Calibration	Traceable to British (NPL) and American (NIST) National Humidity Standards
Accuracy	Dew point: ±1°C between -60 and +20°Cdp (±1.8°F between -76 and +68°Fdp) Moisture content: ±10 % of reading Dew point: ±2°C between -60.1 and -100°Cdp (±3.6°F between -76.1 and -148°Fdp)
Resolution	0.1°C between +20 and -100°Cdp (0.18°F between +68 and -148°Fdp)
Analysis pressure	Up to 45 MPa (6526.7 psig)
Operating temperature	-40 to +60°C (-40 to 140°F)
Sample flow rate	1 to 5 l/min (2.12 to 10.59 scfh)
Optional pressure sensor	0-69 or 0-138 barg (other ranges available) (0-1000.76 psig or 0-2001.52 psig) Accuracy: ±0.25% FS
Certification
Hazardous Area Certification	ATEX - II 1 G Ex ia IIC T4 Ga (-20°C = Ta = +70°C) FM - IS / I / 1 / ABCD / T4 Ta = +70°C CSA - IS Class I, Division 1, Groups ABCD T4 +70°C IECEx - Ex ia IIC T4 (-20°C = Ta = +70°C) GOST Ex
Pattern Approval	GOST-R, GOST-K
Control Unit
Display	Two line 6-digits LED, displaying moisture content / dew point (user toggle) and analysis pressure
Analog output	Two 4-20 mA (max. load 500 Ω) User configured for parameter, unit and range
Digital output	RS485 Modbus RTU
Display mode	Moisture content (ppmV) Moisture content in natural gas (ppmV, LBMMSCF, mg/m3) Dew point (°C or °F) Temperature (°C or °F) Pressure (psig, barg)
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 ppmV ideal gas (adjustable), 0.01 ppmV natural gas, 0.01 mg/m3, 0.01 lb/MMSCF, 1 psig, 0.1 barg
Alarms	Four alarm relays. Control action and setpoint are user programmable Two Form C contacts rated 10 A, 240 V AC or 8 A, 24 V DC. Non-inductive load Two Form A contacts rated 5 A, 240
I.S. Barriers	Galvanic isolation type, integrated to Control Unit
Power supply	85-265 V AC 50/60Hz or 10-72 V DC 10 W max. power consumptionV AC or 4 A, 24 V DC. Non-inductive load
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 375mm (h x w x d) (5.2 x 19.02 x 10.08 in) (100mm (3.94 in) minimum clearance depth for cables and vents)
Operating environment	Indoor, safe area, 0 to +50°C (+32 to +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 (h x w x d) (31.5 x 23.62 x 11.81 in)
Enclosure mounting	Stainless steel wall mounting brackets
Enclosure ingress protection	IP66
Enclosure temperature control	Heater/thermostat options for fixed set-point +20°C or adjustable set-point range 0 to control 50°C
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 to +50°C / -4 to +122°F (-40 to +60°C / -40 to 140°F +max. transient) Enclosure cooling option recommended for climatic ambient > +45°C (113°F)