The laser based trace water analyzer uses a specific wavelength of laser to penetrate gas samples and utilizes the absorption characteristics of water molecules towards laser energy for detection. When the laser beam passes through a gas containing water, water molecules absorb specific wavelengths of light energy and transition to high-energy states. The instrument detects the degree of light intensity attenuation and combines second harmonic analysis technology to calculate the water concentration in real time (from μ mol/mol to%). This principle gives it the advantages of high sensitivity, high precision, and non-contact measurement.
Laser based trace water analyzer is mainly used to detect the trace moisture content in gases or liquids, and is suitable for multiple industrial fields such as petrochemicals, power, lithium batteries, chlor alkali, air conditioning, etc. It can monitor the moisture content in feed gas, cracking gas and other gases in real time to ensure production safety and product quality.
Precautions for use
Clarify the object of detection: gas, liquid, or solid? Whether the sample is corrosive, contains dust or strong interfering components (such as high concentration CO ₂), a targeted sample processing unit (such as a corrosion-resistant chamber) should be selected.
Pay attention to the on-site environment: Ex certified models should be selected for explosion-proof occasions; High temperature environments require ensuring the operating temperature range of core components of the instrument, such as laser light sources.
Regular calibration and maintenance: The laser light source may decay over time, and it is recommended to calibrate it with standard gas/liquid every 6-12 months; Keep the sample processing unit clean (such as no dust in the gas chamber and no residue in the flow cell) to avoid affecting the detection accuracy.
Key points of operation and maintenance
Installation environment: Avoid vibration and strong electromagnetic interference, ensure the cleanliness of the air chamber, and prevent oil stains from blocking the sensor micropores.
Calibration cycle: It is recommended to calibrate with standard gas every 6 months or adjust according to process requirements.
Troubleshooting: If abnormal data is displayed, check the sealing of the gas path, laser power, and background gas compensation settings.
Laser based trace water analyzer has become an important solution for high-precision moisture detection due to its technological advantages. When selecting, a comprehensive evaluation should be conducted based on specific operating conditions such as range, response speed, and environmental adaptability to ensure long-term stability.