Spark CH4

With the Spark CH4, powerful advanced spectroscopy is available at a popular price for a host of applications, from process control to quality and safety assurance in Air Separation Plants. Other applications include monitoring of cylinder filling, bulk delivery and distribution transfer points, as well as welding, medical, industrial and high-purity gas production, and more. Sensitivity as low as 6 ppb with full range measurement as high as 80 ppm CH4 makes the Spark an ideal solution for these applications.

Say goodbye to cumbersome, complex, costly and labor-intensive mid-20th century technology. Gone is the need for calibration, spare parts, limited measurement ranges, and worries about drift and downtime usually associated with NDIRs. And without the need for H2 fuel gas and with plug-and-play installation within minutes, the Spark CH4 is a faster and safer alternative to FIDs. Plus, it’s a joy to start up and to operate.

Designed for trace methane analysis, the new, affordable Spark CH4 offers:

  • Powerful, proven Cavity Ring-Down Spectroscopy (CRDS) technology
  • Drift-free measurement
  • Increased laboratory safety without the need for fuel gas
  • Self-tuning and auto-calibration
  • Extremely low Cost of Ownership
  • Ethernet, 4–20 mA and RS-232 connectivity
  • Fast response with low gas consumption
  • CH4 analysis over a vast range: 6 ppb to 50 ppm (in O2)


  • Air Separation Units & Nitrogen Plants
  • Gaseous CRMs & Calibration Gas Mixtures
  • High-Purity Gases & Systems
  • Hydrogen Fuel Cells
  • Research & Development

Learn More


Laboratory & Scientific

Stack, Process & CEMS

Detection Capability

Detection and Matrix Range LDL (3σ) Precision (1σ) @ zero
CH4 in N2 0 – 80 ppm 7.5 ppb 2.5 ppb
CH4 in O2 0 – 50 ppm 6 ppb 2.0 ppb
CH4 in Ar 0 – 70 ppm 6.5 ppb 2.2 ppb
CH4 in He 0 – 50 ppm 6 ppb 2.0 ppb
CH4 in H2 0 – 80 ppm 7.5 ppb 2.5 ppb
CH4 in Clean Dry Air (CDA) 0 – 80 ppm 7.5 ppb 2.5 ppb


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
Accuracy (greater of) ± 4% or LDL
Speed of response < 1 minute to 90%
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 and outlet
Inlet pressure 10 – 125 psig (1.7 – 9.6 bar)
Flow rate ∼0.6 slpm (in N2), gas-dependent
Sample gases Most inert, toxic, and passive matrices
Gas temperature Up to 60°C
Dimensions, H x W x D
Standard sensor 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 32 lbs (14.5 kg)
Alarm indicators 2 user programmable, 1 system fault, Form C relays
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 touch screen, 10/100 Base-T Ethernet, RS-232
802.11g Wireless (optional), Modbus TCP (optional)
U.S. Patent #7,277,177

Request information or pricing

If you need a quote, specifications or technical info, or anything else – please submit the form below and one of our team of experts will happily get back to you within 24 business hours. 

  • This field is for validation purposes and should be left unchanged.

Related Products

.woocommerce .woocommerce-tabs h2 { display: none; }