High Sensitivity NDIR Gas Analyzer Customized Non Dispersive Infrared Gas Analyser

NDIR Analyzers CO CO2 CH4 CnHm high-stability infrared detectors process gas monitoring

NDIR (Non-Dispersive Infrared) analyzers are instruments used to measure the concentration of specific gases in a sample based on the principle of infrared absorption. These analyzers employ infrared light sources, gas sample chambers, optical filters, detectors, and signal processing techniques to accurately determine gas concentrations.

Here are some key points about NDIR analyzers:

1. Principle of Operation: NDIR analyzers operate by passing infrared light through a gas sample containing the target gas. The infrared light is typically emitted by an infrared light source, such as an IR LED or heated filament. The gas sample chamber allows the light to interact with the gas molecules.

2. Gas Absorption and Detection: The target gas molecules in the sample absorb specific wavelengths of infrared light based on their molecular structure. The remaining light, which is not absorbed by the gas molecules, reaches a detector positioned on the other side of the gas chamber. The detector, often a thermopile or pyroelectric sensor, measures the intensity of the transmitted light.

3. Optical Filters: NDIR analyzers incorporate optical filters to isolate the specific wavelengths of infrared light that are absorbed by the target gas. The filters help eliminate other wavelengths that could interfere with the measurement. By selecting appropriate filters, the analyzer can enhance selectivity and accuracy for the desired gas.

4. Reference Channel: To compensate for variations in the light source intensity and environmental conditions, NDIR analyzers often include a reference channel. The reference channel measures the background or reference signal, representing the unabsorbed infrared light. By comparing the reference signal with the signal from the gas sample, the analyzer can accurately determine the gas concentration.

5. Calibration and Measurement: NDIR analyzers are calibrated using known gas standards to establish a calibration curve or relationship between the measured signal and gas concentration. During operation, the analyzer measures the signal from the gas sample and correlates it with the calibration curve to determine the gas concentration. The concentration is typically displayed digitally or transmitted to external systems.

6. Gas Applications: NDIR analyzers are widely used for the measurement of various gases, including carbon dioxide (CO2), carbon monoxide (CO), methane (CH4), nitrous oxide (N2O), sulfur dioxide (SO2), hydrocarbons, and other volatile organic compounds (VOCs). These analyzers find applications in environmental monitoring, industrial emissions control, indoor air quality assessment, combustion analysis, and process monitoring.

7. Advantages: NDIR analyzers offer several advantages, including high sensitivity, selectivity, and stability. They can provide real-time measurements, have low maintenance requirements, and can operate in a wide range of temperatures and humidity conditions. NDIR analyzers are known for their accuracy and reliability in gas concentration measurements.

It's important to note that different gases require specific infrared light sources, filters, and calibration curves tailored to their absorption characteristics. Therefore, NDIR analyzers are often designed and optimized for specific gases or gas families.

NDIR gas analyzer  IR-GAS-600 this model high-stability infrared detectors for simultaneously measuring CO, CO2, and CH4. H2 always reads correctly, independent of the background gas composition. An optional non-depleting paramagnetic sensor can be used to conduct O2 analysis. All sensors/detectors are temperature-controlled or temperature-compensated for maximum analytical stability.

Both types of analyzers are available with analysis of:

• Carbon Monoxide (CO) via infrared detector
• Carbon Dioxide (CO2) via infrared detector
• Oxygen (O2) via electrochemical sensor or optional paramagnetic
• Methane (CH4) via infrared detector

☑ Measure COppm+CO2+CH4ppm+N2Oppm in the one unit

☑ Measure CO%+CO%+CO2%+CH4%+CnHm% in the one unit

IR-GAS-600 series suitable for process gas analysis