Spark C2H2

Simple, Drift-Free C2H2 Contaminant Detection

With the Spark analyzer family, powerful advanced spectroscopy is available at a popular price for a host of applications, from process control and quality assurance in Air Separation Plants to refineries and hydrogen 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. Part-per-billion level sensitivity and high-ppm ranges make the Spark an ideal trace gas detection solution for these industrial gas 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 GCs. And without the need for H2 fuel gas and with plug-and-play installation within minutes, the Spark is a faster and safer alternative to FIDs. In addition, the Spark has the lowest Cost of Ownership in the industry.

The Spark C2H2, along with the Spark CH4, CO and CO2, perfectly complements our popular Spark H2O trace moisture analyzer to utilize powerful, drift-free and hassle-free Cavity Ring-Down Spectroscopy technology for all your critical contaminants.

The Spark C2H2 ensures purity and process protection with:

  • Parts per billion (ppb) acetylene (C2H2) detection capability
  • Wide measurement range, from 0–80 ppm (in nitrogen)
  • Freedom from calibration (absolute measurement technology)
  • Low cost of ownership
  • Drift-free performance & immunity to vibration


  • Air Separation Units & Nitrogen Plants
  • Gaseous CRMs & Calibration Gas Mixtures
  • Research & Development


Detection and Matrix Range LDL (3σ) Precision (1σ) @ zero
C2H2 in N2 0 – 80 ppm 8 ppb 3 ppb
C2H2 in O2 0 – 70 ppm 7 ppb 2.5 ppb
C2H2 in Clean Dry Air (CDA) 0 – 80 ppm 8 ppb 3 ppb


Operating range See Detection Capability table
Detection Limit (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 ∼0.7 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