Condumax II On-Line is a fully self-contained hydrocarbon dew point analyzer, using the proven "Dark Spot" hydrocarbon dew point measurement principle from the highly successful Condumax instrument. Combining a hydrocarbon dew point cell and water dew point measurement in the same compact and lightweight EExd enclosure, Condumax II On-Line requires nothing more than mains power to operate.

Product 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, CCSAUS and GOST Ex certifications


Technical Specification

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 0.03m³/hr (0.5 Nl/min) – alarm standard
Measurement Frequency 6 cycles/hour (recommended)
12 cycles/hour (maximum)
Water Dew-Point Measurement (Optional)
Measuring Technique Michell Ceramic 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°Cdp
Accuracy ±1°C from -59 to +20°Cdp
±2°C from -100 to -60°Cdp
Sample Flow 0.06 to 0.3 m3/hr (1 to 5 Nl/min) alarm standard
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 HCdp: 0 to 100 barg
Wdp:  0 to 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 1/4" NPT female ports for both hydrocarbon and water dew-point channels;
Sampling system: 6mm OD Std / 1/4" OD optional
Operating Environment Indoors/Outdoors -20 to +50°C; Max 95% RH
Power Supply 90 to 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 22.5kg Main Unit
42kg (approx) c/w Sampling System (indoor)
57kg (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
Hazardous Area Certification ATEX / IECEx: II 2G Ex d IIB + H2 Gb Tamb = -40°C to +60°C
Tamb -40°C to +60°C T3
CCSAUS certified to Class 1, Div 1, Groups B, C & D, T4
Pattern Approval GOST-R, GOST-K, GOST-T, ukrSEPRO
Remote Interface
Optional for indoor safe area installation
Host Capacity Up to 31 Michell EExd Process Instrumentation Range Analyzers in any combination of models via Modbus
Display Backlit colour 15cm/6" LCD
User Interface Integral mouse, on-screen keyboard
Function View and modify analyzer operating settings;
Record parameters to file and view virtual chart recorder analyzer diagnostics
Ports LAN, USB2, Modbus Re-transmission
Data Download CSV (comma separated variable) format for easy import to ExcelTM
Remote Access OPC (OLE for Process Control) over a LAN Imbedded web page/unique IP address for PC access
Remote data reading via Modbus RTU
Power Supply 100 to 280 V, 50/60 Hz
Plant Control Integration ActiveX components to be used by software programmers for integration of Modbus protocol into a general plant software system

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