Products & Services

Online Bio-Gas Analyzer

  • Bio Gas analysis
  • Digester gas research
  • Engine feed gas analysis
  • Sampling collection devices

  • Analysis of 4 gases CH4, H2S, CO2 and O2
  • Configurable in dilution mode which enables to measure H2S in 2% Vol/Vol
  • Up to 4 streams.
  • Single panel to analyse gas before and after scrubbing with single set of sensors
  • Built in sample conditioning system
  • Both auto and manual mode of operation
  • H2S scrubber for prolonging CH4, CO2 and O2 sensor life
  • Data logging with timestamp onto USB and customer PC
  • SCADA on customer PC for monitoring, control and data logging
  • Colour touch display for gas monitoring and control
  • Auto Calibration
  • Inbuilt diagnostic mode
  • Signal retransmission both digital and 4-20mA signals
  • On display trends and graphs for analysis
  • Programmable alarms
  • Audio and visual alarms

User settable parameters:

Sr. No. Parameter Value
1. O2 High Value 30%
2. O2 Low Value 0%
3. CO2 High Value 100%
4. CO2 Low Value 0%
5. CH4 High Value 100%
6. CH4 Low Value 0%
7. H2S High Value 20000ppm
8. H2S Low Value 0 ppm
9. Operating Mode Auto/Manual
10. Temperature Hysteresis 2
11. Temperature Set point 2
12. Chiller Drain On Time 10
13. Chiller Drain Off Time 30
14. Sampling On Time 10 minutes
15. Sampling Off Time 30 minutes


General Specification
Type PLC based Multi-Channel analyzer system for measuring gas composition in biogas
Components to Measure CH4, CO2, O2 & H2S
Analyzer Housing Material M.S with Powder coating
Panel Dimensions (H x W x D) (1385x609x304) mm
Mounting Free standing panel
Mounting Accessories Inclusive (Wiringand piping to brought till panel)
Weather Protection Suitable for Outdoorapplication, IP-55
Power Supply 230VAC, 50Hz
System Type Sampling Type
Technique / Type of Sensor
For CO2 & CH4 Non Dispersive Infra Red (NDIR)
For H2S Electrochemical
For O2 Electrochemical
Analyzer Range
CH4 0 - 100% Vol.
CO2 0 - 100% Vol.
H2S 0 - 2000 PPM
O2 0 - 30% Vol.
Multipoint sampling system Provided
No. of Stream Up to 4
Suction Pump Diaphragm Pump
Process connection 1/4" tube fitting
Wetted Part SS 316/ Teflon
Isolation Valve for Stream 1/2" NPT(F)
Tubing & Tube Fittings 1/4" tube fitting
Material SS 316/ Teflon
Tubing for Calibration gas / SS316 1/4" tube fitting
Flow Indicator Present in the system
Pressure Indicator Not required
Temperature Indicator Displays Dew Point of treated gas stream
Processed Gas (Recycled / Vented) Vented
Sensor Transmitter
Output Modbus and 4 nos. (4-20) mA Analog output
Comm. Protocol Rs. 485, Modbus Protocol
Alarm High and Low alarms, user programmable
Local Indicator Touchscreen HMI
Display type TFT Display
Display Size 113 x 138 x 43 mm
Electronic Calibration Range As per service condition specified
Sensor Characteristics For NDIR technique
Overall Accuracy ± 1% of full scale or Better
Zero/Span drift ± 1% of full scale in 24 hours.
Response Time < 5 sec. for 90% response
Repeatability ± 2 % of reading
Sensor Characteristics For Electrochemical technique
Overall Accuracy ± 2% of full scale or Better
Zero/Span drift 1% of full scale
Response Time < 15 sec. for 90% response
Repeatability ± 2% of full scale or Better
Other Sensor Characteristics For Electrochemical technique
Linearity +/-' 2 % of full scale
Rangeability +/-' 2 % of full scale
Warm up Time < 3min
Single Cycle Time for each stream 5 mins
Stability < 3 min
Relative Humidity 90% non-condensing
Sensor Life Expectancy 1yr for NDIR (depending on moisture and Conc of Biogas)
Electromagnetic Compatibility Shall be as per IEC 801
Calibration System
Calibration gas cylinder (0.5LtrCanister) Optional
Capacity Mini. For 1 year
Purging gas (Automatic/Manuel) Auto
Purging gas Medium Instrument Air
Pressure / Temperature ambient/ ambient
Zero Calibration Type (Automatic / Manuel) Manual
Zero Calibration gas Instrument Air
Pressure / Temperature ambient/ ambient
Pressure / Temperature ambient/ ambient
Sample Conditioning System confirmed for dust and moisture (Chiller Unit)
Touch Pad/Key padoper Keypad
Power consumption 250 W
Booster Pump Provided
Earthing Provided
Surge / Lightning Protection Provided
Warranty 12 months
Max. distance b/w sample tapping point & analyzer for good response time up to 200 meter is 1/4 inch line is used for sampling line