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Hydrocarbon Dew-Point Analyzer - Michell Condumax II

Updated:2023-10-16

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  • Brand: PST/Michell
  • Model: Condumax II
  • Description: 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-mir
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Product Details

Hydrocarbon Dew-Point Analyzer - Michell Condumax II Description:

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

Natural gas processing

Gas quality measurements at custody transfer

Transmission pipeline monitoring

Confirmation and control of fuel gas ‘superheat’ to turbine power plant

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