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CT5100 Continuous

Gas Analyzer

Rosemount™ CT5100 Continuous Gas Analyzer Mobile Banner

CT5100 Continuous
Gas Analyzer

Rosemount™ CT5100 Continuous Gas Analyzer

Emerson’ s Rosemount CT5100 continuous gas analyzer is the first Quantum Cascade Laser (QCL) system developed for process gas analysis and emissions monitoring. The CT5100 is available in two variants: a certified system, housed in a purged and pressurized enclosure for hazardous area installations (illustrated); and a non-certified system for use in nonhazardous areas.

Both can house up to six lasers to measure multiple components in the gas stream simultaneously. The laser arrangement consolidates the measurement requirements into a single gas analyzer.


+ Multi-component QCL/TDL analyzer
  • Measures up to twelve gases simultaneously
  • Accurate and sensitive gas measurements
  • 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 function


+ Field serviceable and field configurable
  • Interchangeable modular configuration for up to six lasers


+ Hazardous certification
  • Europe: ATEX II 3G Ex p IIC T3
  • North America: Class I, Division 2, Groups A, B,C,D, and T3
+ Engineered Sample Handling Systems
  • A process gas analyzer is only as good as the quality of the sample it measures, which is why Emerson provides custom- engineered sample handling systems designed to the meet the application’s specifications which are rigorously tested before it ships to the customer.
+ Typical features include
  • Heated and open-panel designs
  • All components rated for the area classification
  • Automatic calibration/validation available as an option
  • Variety of sample probes to extract a reliable and stable sample from the process
  • Other specifications are custom engineered as needed

Rosemount™ CT5100 Continuous Gas Analyzer - QCL Technology


Emerson’s Quantum Cascade Laser technology offers fast, high resolution spectroscopy to detect and identify a range of molecules in the mid-infrared wavelength range. Coupled with Tunable Diode Laser (TDL) spectroscopy, a single instrument is now able to broaden insight and monitor both the near and mid-infrared range of spectroscopic light.

Rosemount™ CT5100 Continuous Gas Analyzer - Patent Chirp Technique


When power is applied to the analyzer, the QCL heats up and as the temperature rises, laser wavelengths begin to increase. The QCL then sweeps the wavelength frequencies to detect each component of interest before cooling the device to its original temperature. This patented laser chirp process occurs in under one microsecond, enabling thousands of spectra to be recorded each second.



QCL analyzers can be configured to have up to six high-resolution laser modules and measure up to twelve unique components simultaneously.

1. Optical bench base plate – superior rigidity for continuous, high accuracy measurement that is immune to vibration and temperature changes.
2. Smart laser modules – unique and sequenced laser chirp for fast, multi-component measurement.
3. Optical path mirrors – direct light, rigid connection to base plate to ensure alignment.
4. Flow Cell - designed to extend optical path length for greater resolution of low component (or analyte) concentrations.
5. Detector - ultrafast detection of emitted light.

Rosemount™ CT5100 Continuous Gas Analyzer - Detection-Analysis


Combining QCL and TDL techonologies into a single analyzer provides unmatched measurement performance and accuracy for process gas analysis. The narrow line width allows scanning of individual peaks of identified components with minimum interference and without filtration, reference cells, or chemometric manipulations.


One of QCL’s major advantages is its laser module. Rugged and compact, the packaged laser modules can be removed and easily serviced or replaced as needed. Attached securely to the analyzer’s optical bench, each module is preconfigured to detect up to two components simultaneously with no field alignment required.


World’s only hybrid analyzer
Rosemount™ CT5100 continuous gas analyzer, the world’s only hybrid analyzer to combine Tunable Diode Laser (TDL) and Quantum Cascade Laser (QCL) measurement technologies for process gas analysis and emissionsmonitoring.


Most Comprehensive Analysis
The CT5100 is the latest offering in the Emerson CT5000 series, providing the most comprehensive analysis available as it can detect down to low ppm level for a range of components, while simplifying operation and significantly reducing costs.


Measures up to 12 gases & pollutants simultaneously
Unlike traditional continuous gas analyzers, the CT5100 can measure up to 12 critical component gases and potential pollutants simultaneously within a single system – meeting local, state, national, and international regulatory requirements.

Click to get more information on Rosemount™ CT5100 Continuous Gas Analyzer





±1 %
Ambient Temperature
-20 °C to 55 °C (-4 °F to 131 °F) Other ranges available upon request
Communication Protocol
Analog signal out: 4–20 mA (1 per measurement) • Digital signal out: Modbus over TCP/IP or RS-232 • Health monitoring: Digital healthline (1 per measurement) or NAMUR status reportInlet gas port connector: 6 mm (¼ in) Swagelok type (specify on order)
Communication Protocol
Outlet gas port connector: 6 mm (¼ in) Swagelok type (specify on order) • Purge connector: Purge inlet (certified system only) 10 mm (? in)
Europe: ATEX II 3G Ex p Group IIC T3 • North America: Class 1, Division 2, Groups A,B,C,D T3
575 x 291 x 781 mm (23 x 11-1/2 x 31 in)
53 kg (116.8 lbs)
Power Supply
110 VAC 60 Hz / 240 VAC 50 Hz
R2 > 0.999



Rosemount™ CT5100 Continuous Gas Analyzer Image



Click to get more information on Rosemount™ CT5100 Continuous Gas Analyzer

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