Gasmet product portfolio includes industrial multicomponent gas analyzers for continuous monitoring applications. The Gasmet CX4000 incorporates a Fourier transform infrared spectrometer, a temperature controlled sample cell, and signal processing electronics. The analyzer is fully equipped for fixed installations and it offers versatility and high performance for all industrial users.

The Gasmet CX4000 is designed for continuous emission monitoring (CEM). It is an ideal tool to analyze trace concentrations of pollutants in wet, corrosive gas mixtures. The sample cell can be heated up to 180 °C. Sample cell absorption path length is selected according to the application.

The Gasmet CX4000 allows simple calibration using only single component calibration gases. The user can easily configure the analyzer for a new set of compounds.

Gasmet™ CX4000 has both TÜV (17th BlmSchV) and MCERTS certificates. The analyzer is also compliant with U.S. EPA 40 CFR Part 60 Appendix b Performance Specification 15.


  • TÜV (17th BlmSchV) and MCERTS certified
  • Compliant with U.S. EPA 40 CFR Part 60 Appendix b Performance Specification 15
  • Easily configurable application library
  • Wide area of application


  • Continuous emissions monitoring, e.g. waste incineration or cement kiln
  • Process control
  • Fire testing

Gasmet™ CX4000 is an integral part of the Gasmet™ Continuous Emissions Measurement System (CEMS II).

Technical Data

General parameters
Measuring principle: Fourier transform infrared, FTIR
Performance: Simultaneous analysis of up to 50 gas compounds
Response time, T90: Typically < 120 s, depending on the gas flow and measurement time
Operating temperature: Short term 0 - 40°C
long term 5 - 30°C
Storage temperature: -20 - 60°C, non-condensing
Power supply: 100-115 or 230 V / 50 -60 Hz
Power consumption: 300 W max, continuous 150 W


Resolution: 8 cm-1 or 4 cm-1
Scan frequency: 10 scans / s
Detector: Peltier cooled MCT
Source: SiC, 1550 K
Beamsplitter: ZnSe
Window material: ZnSe
Wave number range: 900 - 4 200 cm-1


Sample cell
Structure: Multi-pass, fixed path length 5.0 m
Material: 100 % rhodium coated aluminium
Mirrors: Fixed, protected gold coating
Volume: 0.4 liters
Connectors: Inlet Swagelok 6 mm
Outlet Swagelok 8 mm
Gaskets Viton® O-rings
Temperature: 180 °C, maximum
Window material: BaF2


Measuring parameters
Zero point calibration: 24 hours, calibration with nitrogen
(5.0 or higher N2 recommended)
Zero point drift: < 2 % of measuring range per zero point calibration interval
Sensitivity drift: None
Linearity deviation: < 2 % of measuring range
Temperature drifts: < 2 % of measuring range per 10 K temperature change
Pressure influence: 1 % change of measuring value for 1 % sample pressure change. Ambient pressure changes measured and compensated


Electrical connectors
Digital interface: 9-pole D-connector for RS-232
Analyzer is connected to an external computer via RS-232C cable. The external computer controls Gasmet.
Power connection: Standard plug CEE-22


Gas inlet and outlet conditions
Gas temperature: Non-condensing, the sample gas temperature should be the same as the sample cell temperature
Flow rate: 120 - 600 liters per hour
Gas filtration: Filtration of particulates (2 µm) required
Sample gas pressure: Ambient
Sample pump: External, not included


A/D converter: Dynamic range 95 dB
Signal processor: 32-bit floating point DSP, 120 MFLOPS speed
Computer: External, not included


Analysis software (for external PC)
Operating system:  Windows 7 (32-bit)
Analysis software:  Calcmet for Windows


Sample cell: Multi-pass, fixed path length 2.5 m or 9.8 m
Pressure measurement: Inside sample cell
External PC: Gasmet PC for control and analysis with optional alarm relay boards and analog inputs or outputs
Sample cell gaskets: Teflon® coated Viton® or Kalrez®


Material: Aluminium
Dimensions (mm): 482 * 196 * 450
Weight: 17 kg
CE label: According to EMI guideline 89/336/EC

Gasmet Technologies Oy shall not be liable for technical or editorial errors or omissions contained herein. The information in this document is provided “as is” without warranty of any kind and is subject to change without notice. Should you find any errors, we would appreciate if you notified us.


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