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Rosemount™ CT5800 Continuous Gas Analyzer
rosemount ct5800
The Rosemount CT5800 Continuous Gas Analyzer is the first hybrid, lased-based analyzer designed for industrial process applications requiring Class I, Division 2 hazardous area certification.
Housed in a flameproof enclosure, the Rosemount CT5800 combines Quantum Cascade Laser (QCL) and Tunable Diode Laser (TDL) technologies, expanding gas analysis to both the near and mid-infrared range for highly sensitive and selective detection of multiple gases in real time. Ideal for gas purity and quality applications, the Rosemount CT5800 uses a unique intra-pulse spectroscopic method that enables sub-parts-per-million analysis of up to 10 gases simultaneously in a single instrument, reducing cost of ownership, footprint and operational complexity.

Get Continuous, Fast and Precise Process Gas Analytics Using Rosemount Hybrid QCL/TDL Laser Gas Analyzers

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Rosemount™ CT5800 Continuous Gas Analyzer


Sample Gas Temperature
4 to 60 °C (39 to 140 °F)
Humidity Range
10–95 %, non-condensing
Europe: ATEX II 2G Ex d IIB+H2 T4
North America: Class I, Division 2, Groups B, C, D, T4
Inlet gas port connector 6 mm (¼ in.) Swagelok type (specify on order)
Outlet gas port connector 6 mm (¼ in.) Swagelok type (specify on order)
Power Supply
120 VAC 60 Hz / 240 VAC 50 Hz 200 V/A
651.9 X 265.1 X 515.2 mm (25.67 x 11.54 x 20.28 in.)
85 kg (187.39 lbs)
Output Signal
Analog signal out 4–20 mA (1 per measurement)
Digital signal out Modbus over TCP/IP
Health monitoring Digital healthline (1 per measurement) or NAMUR status report


  • Real-time detection of up to ten gases simultaneously
  • Accurate and sensitive gas measurements
  • Enhanced dynamic ranges from sub-ppm to percent levels
  • Excellent linearity of response and repeatability
  • Low, long-term drift minimizes calibration intervals
  • Low maintenance and low lifetime costs
  • Continuous health diagnostic reporting
  • Embedded ARM processor for fully autonomous operation
  • Intuitive, simple front panel user interface allows access to all instrument functions
  • Interchangeable modular configuration for up to six lasers