CH4 analyzer for greenhouse gas monitoring


  • Greenhouse Gas Monitoring
  • Research & Development
Detection and Matrix Range LDL (3σ) Precision (1σ) @ zero
Low-Range Model   
CH4 in Clean Dry Air (CDA)0 – 25 ppm1.5 ppb0.5 ppb
CH4 in N20 – 25 ppm1.5 ppb0.5 ppb
CH4 in Ambient Air0 – 25 ppmN/AN/A
High-Range Model   
CH4 in Clean Dry Air (CDA)0 – 100 ppm7.5 ppb2.5 ppb
CH4 in N20 – 100 ppm7.5 ppb2.5 ppb
CH4 in Ambient Air0 – 100 ppmN/AN/A
Upper range available as high as 1000 ppm on request   
Operating range See Detection Capability table
Detection limit (LDL, 3σ/24h) See Detection Capability table
Precision (1σ, greater of) ± 0.75% or 1/3 of LDL
  (equivalent to 15 ppb over 24 h at typical ambient CH4 levels)
Accuracy (greater of) ± 4% or the LDL
  (equivalent to 80 ppb over 24 h at typical ambient CH4 levels)
Speed of response 3 minutes to 95%
Environmental conditions 10°C to 40°C, 30% to 80% RH (non-condensing)
Storage temperature -10°C to 50°C
Gas Handling System and Conditions*
Wetted materials 316L stainless steel, 10 Ra surface finish
Gas connections 1/4" male VCR inlet & outlet
Leak tested to 1 x 10-9 mbar l / sec
Inlet pressure 0 – 15 psig (1 – 2 bara)
Outlet pressure Vacuum (<10 Torr)
Flow rate ∼1 slpm
Sample gases Ambient air, clean dry air (CDA) and N2
Gas temperature Up to 60°C
Dimensions, H x W x D
Standard sensors 8.73" x 8.57" x 23.6" (222 mm x 218 mm x 599 mm)
Sensor rack (fits up to two sensors) 8.73" x 19.0" x 23.6" (222 mm x 483 mm x 599 mm)
Standard sensor 33 lbs (15 kg)
Electrical and Interfaces
Platform Max series analyzer
Alarm indicators 2 user programmable, 1 system fault, Form-C relay
Power requirements 90 − 240 VAC, 50/60 Hz
Power consumption 40 Watts max.
Signal output Isolated 4–20 mA per sensor
User interfaces 5.7" LCD touchscreen, 10/100 Base-T Ethernet
  USB, RS-232, RS-485, Modbus TCP (optional)
Data storage Internal or external flash drive
Certification CE Mark
U.S. Patent #7,277,177  
*Vacuum source with >2 slpm @ 10 Torr required  
Title / Description

T-I Max AIR CH4 and CO2 Brochure (PDF)

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