- Brand: Michell Instruments
Tags: Promet, EExd, Process, Moisture, Analyzer, Michell, Instruments
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.
Product Features
- EExd flameproof certified - IECEx, ATEX, CCSAUS and TC TR Ex
- Complete hazardous area installation
- Single or dual-channel measurements
- Moisture content, dew point and pressure
- Calibration traceable to NPL (UK) and NIST (US)
- Range -120 to +30°C dew point (-184 to +86°F)
0.001 to 30,000 ppmv - Remote global access options
- Sour gas compatible
- Field calibration maintenance
Technical Specification
| Channel Configurations | Single and two channel |
| Moisture Parameters | Dew point °C and °F |
| Moisture Content | Automatic pressure compensated conversions: ppmV for natural gas and ideal gas lb/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 (-184 to +86°Fdp) 1 ppbv to 30,000 ppmv 0 to 250 barg (0 to 3625 psig) |
| Calibration Range | -100°C to +20°Cdp (-148°Fdp to +68°Fdp) 10 ppbv to 23,000 ppmv |
| Accuracy | Dew point: ±1°C between -59.9 & +20°Cdp (±1.8°F between -75.8 & 68°Fdp) Moisture content: ±10% of reading Dew point: ±2°C between -60 & -100°Cdp (±3.6°F between -76 & -148°Fdp) Moisture content: ±20% of reading Analysis Pressure: ±0.25% FS |
| Measured Resolution | 0.1°C (0.18°F): -80 to +20°Cdp (-112 to +68°F) 1°C (1.8°F): -100 to -80°Cdp (-148 to -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°Cdp and -80°Cdp (0.18°F between +68 and -112°Fdp) 1°C between -80°Cdp & -100°Cdp (1.8°F between -112 & -148°Fdp) |
| 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 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 | Explosion proof NEC / Flameproof EExd |
| Construction | Cast copper-free aluminum |
| 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 (1 to 10.5 scfh) |
| Sample Flow Alarm | Optional |
| Power Supply | 90 to 260 V AC, 50/60 Hz, 180 W Main Unit |
| Operating environment | Indoor/Outdoor -20 to +60°C (-4 to +140°F) Max 95%RH. Shaded location |
| Certification | |
| Hazardous Area Certification |
ATEX: II 2G Ex d IIB + H2 Gb IECEx: Ex d IIB + H2 Gb Tamb -40°C to +45°C T4 Tamb -40°C to +60°C T3 cSAus: Class I, Division 1, Group B, C, & D T4 *TC TR: 1Ex d IIB+H2 T4, T3 Gb |
| Pattern Approval | GOST-R, GOST-K |
