SAM-PTI PROMET I.S. Online Hygrometer
Heavy duty, industrial hygrometer systems for measurement of high pressure, process gases & vaporized liquids
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.
• 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
• 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
| Sensors | |
| Sensor Technology | Michell Ceramic Moisture Sensor |
| Sensor Version | Easidew PRO I.S. |
| Measurement Range | -100 to +20°Cdp |
| Calibration Range | -100 to +20°Cdp |
| Calibration | Traceable to British (NPL) and American (NIST) National Humidity Standards |
| Accuracy | Dew point: ±1°C between -60 and +20°Cdp Moisture content: ±10% of reading Dew point: ±2°C between -60.1 and -100°Cdp |
| Resolution | 0.1°C between +20 and -100°Cdp |
| Analysis Pressure | Up to 45 MPa (450 barg) |
| Operating Temperature | -40 to +60°C |
| Sample Flow Rate | 1 to 5 l/min |
| Optional Pressure Sensor | 0-138 barg (other ranges available) 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 |
| Analogue 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, lb/MMSCF, 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 set-point 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 V AC or 4 A, 24 V DC. Non-inductive load |
| I.S. Barriers | Galvanic isolation type, integrated to Control Unit |
| Power Supply | 90 to 264 V AC, 50/60Hz or 10 to 72 V DC, 10 W max power consumption |
| Interconnection Cable | General instrument type, twisted pair, screened, single pair (two pairs with pressure sensor) |
| 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) |
| 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, 47/63 Hz Power consumption 100 W max |
| Operating Environment | Shaded position, on or off shore, -20 to +50°C (-40 to +60°C max transient) Enclosure cooling option recommended for climatic ambient > +45°C |
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