Delivering your best measurements, the extremely versatile T-I Max CEM is used for monitoring gas concentrations of target compounds, both for compliance and process control. The T-I Max CEM analyzer represents the latest advancement in Continuous-Wave Cavity Ring-Down Spectroscopy designed for superior performance and unprecedented speed of response. It is an ideal, proven solution for MATS HCl compliance needs. As such, applications include continuous emissions monitoring of sources, such as cement kilns, power plants, paper mills, and refineries. Using Tiger Optics’ T-I Max CEM analyzer, you can verify concentrations of target compounds with parts-per-billion accuracy, drift-free stability, and virtually immediate response. The T-I Max CEM detects NH3, HCl, HF, H2S, CO, and CH4, among other species. You will find our analyzer is easy to install, exceptionally intuitive to use, and effortless to maintain. The modern software enables you to easily configure the analyzer via its touchscreen display and to communicate with virtually any manufacturer’s DAHS. Two units fit into one 19” rack mount. The robust design—free of moving parts—results in an analyzer that has a high mean time between failures (MTBF) and a very low cost of ownership (COO).

Designed for Continuous Emissions Monitoring (CEM), the robust and compact Tiger-i CEM offers:

  • Accuracy traceable to the world’s major national reference labs
  • Specificity—no interference
  • Sub-ppb detection capability
  • No periodic sensor replacement/maintenance
  • Unprecedented speed of response
  • Wide dynamic range


  • CEM Standards Preparation
  • Cement Kilns & Paper Mills
  • HF Alkylation Unit Emissions
  • Power Generation from Fossil Fuels

Learn More


Laboratory & Scientific

Stack, Process & CEMS

Detection Capability

Model Range LDL (3σ) Precision (1σ) @ zero
T-I Max CEM NH3 0 – 40 ppm 6 ppb 2 ppb
T-I Max CEM HCl 0 – 4 ppm 0.75 ppb 0.25 ppb
T-I Max CEM HF 0 – 1 ppm 0.15 ppb 0.05 ppb
T-I Max CEM H2S 0 – 500 ppm 40 ppb 13 ppb
T-I Max CEM CO 0 – 2000 ppm 75 ppb 25 ppb
T-I Max CEM CH4 0 – 20 ppm 1.5 ppb 0.5 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 min to 95% (NH3), 30 sec to 90% (for HCl and HF), 30 sec to 95% (all others)
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 (1/4″ Swagelok adapters included)
Inlet pressure 0 – 10 psig
Outlet pressure Vacuum (<10 Torr)
Flow rate ∼2 slpm
Sample gases Air, diluted stack gas
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 33 lbs (15 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 touchscreen, 10/100 Base-T Ethernet
USB, RS-232, RS-485
Data storage Internal or external flash drive
U.S. Patent #7,277,177
*Vacuum source with >2 slpm @ 10 Torr required
Higher ranges are available, please contact us.

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