Biogas analyzer / oxygen / carbon dioxide / methane
Gasboard—3200 Hubei Cubic-Ruiyi Instrument CO., LTD


  • Measured entity:

    oxygen, carbon dioxide, methane, hydrogen sulfide, biogas, biomass

  • Measured value:


  • Configuration:


  • Other characteristics:

    digital, continuous, monitoring, online, manual, real-time, sampling, infrared, high-performance, precision, RS485, calibration


Gasboard—3200 online infrared biogas analyzer is designed to measure CH4 ,CO2 ,H2S and O2 concentration simultaneously in different biogas applications, like landfill, water treatment and CDM projects anaerobic digestion and other fermentation processes, based on the single source two beams non-dispersion infrared (NDIR) method for CH4 ,CO2 ,fuel electrochemical method (ECD) for H2S and O2, with gidital and analog signal output.


Technical specifications
Component Method Measuring range Resolution Precision Repeatability Error
CH4 NDIR 0-100% 0.01% ≤ ± 2% FS ≤ ±2% FS
CO2 NDIR 0-50% 0.01% ≤ ± 2% FS ≤ 2% FS
O2 ECD 0-25% 0.01% ≤ ± 3% FS ≤ 2% FS
H2S ECD 0-9999 ppm 1 ppm ≤ ± 3% FS ≤ 2% FS
Note: Measuring range can be defined as customer request.
Flow 0.7-1.2L/min
Inlet pressure 2kPa -50kPa
Sampling gas condition Moisture removed (no condensation), dust filtered (<1um)
Response time (TD+T90) <10s (NDIR)
Warm up time 15 minutes
Communicfation interface RS232
Analog output 4-20mA (can be customized)
Working environment
Work temperature 0-50℃
Relative humidity ≤ 95%
Ambient pressure 86 – 108 kPa
Working power supply 220V±44V AC 50Hz±1Hz
Dimension 483mm*373*140mm (Width*length*height)
Weight Approximately 12 KG

1. Measure % CH4, CO2, H2S, and ppm O2 simultaneously.
2. 1x 4-20mA analogue output per measuring channel
3. 2 alarm relays per measuring channel, with 2 freely configurable gas alarm levels
4. RS232 serial COM port (for real time data download to external PC or laptop as text file, software included)
5. Programmable auto-zero function, including internal pump, relay and solenoid valve


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