current position:home page>Products>Analysis Instrument>PST>

Hydrocarbon Dew-Point Analyzer - Michell Condumax II

Updated:2025-03-13

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
Data download

Feedback
WeChat

QQ

Online Service

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 Spot^TM 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, ppm_V
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