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Original factory packaging
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Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Updated:2025-03-13
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Product Manual Datasheet
On-Line Dew-Point Analysis in Natural Gas
Features
Fully automatic on-line analysis
Objective, highly repeatable measurements
0.5 °C hydrocarbon dew-point accuracy
Fundamental chilled mirror principle
Patented detection technique
Self-cleaning
No purge or cooling gas required
Optional water dew-point analysis
Modbus RTU
IECEx, ATEX, UKCA, cQPSus and GOST Ex certifications
The Condumax II hydrocarbon and water dew-point analyzer provides continuous, automatic measurements of these two critical parameters of natural gas quality. It uses the ‘Dark Spot’ direct chilled-mirror technique to measure hydrocarbon dew point with high accuracy and long-term reliability. Water dew point measurements are provided by Michell’s Ceramic Metal-Oxide Moisture Sensor.
The Condumax II is housed in a compact explosion-proof enclosure. Both indoor and outdoor sampling systems are available as standard providing comprehensive sample conditioning natural gas at up to 138 barg. For specific applications and requirements, we offer a custom engineering design service.
Condumax II is suitable for use with natural gas containing up to 20 % hydrogen with no further modification required.
Specifications
| Hydrocarbon Dew-Point Measurement | |
| Measuring Technique |
Dark SpotTM fixed sample analysis. Direct photo-detection of hydrocarbon condensate at hydrocarbon dew-point temperature |
| Sensor Cooling | Automatic via 3-stage Peltier effect electronic cooler under adaptive control |
| Maximum Range | Up to Δ -55K measurement depression from Main Unit operating temperature |
| Accuracy | ±0.5 °C hydrocarbon dew point (single and multiple condensible component analysis) |
| Sample Flow | 0.03 m3/hr (0.5 Nl/min) - alarm standard |
| Measurement Frequency |
6 cycles/hour (recommended) 12 cycles/hour (maximum) |
| Operating Pressure | 15…100 barg (218…1450 psig) |
| Water Dew-Point Measurement (Optional) | |
| Measuring Technique | Michell Ceramic Metal-Oxide Moisture Sensor |
| Units - Moisture content | °C and °F water dew point; lb/MMscf; mg/m3, ppmV |
| Resolution | 0.1 °C, 0.1 °F |
| Range | Calibrated from -100 to +20 °C dew point |
| Accuracy |
±1 °C from -59 to +20 °C dew point ±2 °C from -100 to -60 °C dew point |
| Sample Flow | 1 Nl/min (0.06 m3/hr) – alarm standard |
| Temperature Coefficient | Algorithm compensation (-20...+50 °C) |
| Operating Pressure | 30…138 barg (435…2000 psig) |
|
Pressure Measurement Hydrocarbon Dew-Point Analysis Pressure Optional Water Dew-Point Process Pressure |
|
| Units | MPa, barg, psig |
| Resolution | 0.1 MPa and barg, 1 psig |
| Range |
HC dew point: 0...100 barg W dew point: 0...200 barg |
| Accuracy | ±0.25 % FS |
| Hydrocarbon Dew-Point Analyzer | |
| Resolution | Hydrocarbon and water dew point: 0.1 °C |
| Sample Gas Supply | Natural gas up to 100 barg, pressure regulated in sampling system |
| Enclosure | EExd cast enclosure with removable glass window viewing port. Internally heated for condensation protection |
| Sample Gas Connections | 1/8” NPT(F) for both hydrocarbon and water dew-point channels; Sampling system: 6 mm OD or 1/4” OD |
| Operating Environment | Indoors/Outdoors -20...+50 °C; Max 95 %rh |
| Power Supply |
90...260 V AC, 50/60 Hz, 125 W Main Unit 300 W c/w Sampling System (indoor) 400 W c/w Sampling system (outdoor) |
| Weight |
22.5 kg Main Unit 60 kg (approx) c/w Sampling System (indoor) 75 kg (approx) c/w Sampling system (outdoor) |
| Integrated Display/Keyboard | Touch screen with vacuum fluorescent display |
| Outputs |
Modbus RTU, RS485 @ 9600 baud rate Two 4...20 mA linear (non-isolated) outputs, user-configurable for any combination of dew-point or pressure parameters |
| Alarms |
Process and analyzer status via software register and display annotation Integrated low flow alarms for each sample flow Analyzer status fault flag 23 mA on mA Output 1 |
| Certification | |
| Hazardous Area Certification |
ATEX/UKCA: II 2G Ex db IIB + H2 T3 Gb Tamb -40°C...+60°C) IECEx: Ex db IIB + H2 T3 Gb Tamb -40°C...+60°C) cQPSus: Class I, Division 1, Groups B, C and D T3 Tamb -25°C...+60°C) CL I ZONE 1: Ex db IIB+H2 T3 Gb, AEx db IIB+H2 T3 Gb Tamb -40°C...+60°C |
| Additional | TRCU 012 (EAC), PESO (India), NEPSI (China), Ukraine Ex |
| Pattern Approval | GOST-R, GOST-K |
Suitable Applications
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