Gas Analyzer Quality Identification

gas analyzer is a precision instrument used to detect gas composition, concentration and physical properties. It is widely used in environmental monitoring, chemical production, medical diagnosis, energy industry, etc. In environmental monitoring, gas analyzers can detect SO₂, NOx, CO₂ and other pollutants in the atmosphere/exhaust gas in real time. In chemical production, monitor flammable/toxic gases (such as H₂S, Cl₂) during reactions. In medical diagnosis, the partial pressure of O₂ and CO₂ in the blood is measured. In the energy industry, it can be used to analyze the calorific value of natural gas and the composition of coal bed methane.

Compared with traditional detection methods, modern smart gas analyzers have become core equipment for industrial safety, environmental management and medical diagnosis due to their high accuracy (such as ±1% FS), fast response (≤10 seconds) and multi-parameter integration capabilities. Its technical level directly affects production safety, pollution prevention and public health protection, and is an important technical support for the country's high-quality development.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide gas analyzer quality appraisal services. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for gas analyzer quality appraisal.

As the demand for gas detection increases, gas analyzer quality disputes occur frequently. The judicial dispute focuses on:

1, whether the equipment meets the detection accuracy, response time and other indicators agreed in the contract;

2, whether there are data deviations or false alarms caused by sensor aging and calibration failure;

3, explosion-proof/protection level (such as Ex d IIC T6, IP67) whether it meets the requirements for use in hazardous environments;

4, the correlation between quality issues, production accidents, and environmental pollution.

gas analyzer quality identification technical methods include:

1, appearance and structural inspection

Check whether the shell material (such as aluminum alloy, engineering plastics) meets the corrosion resistance requirements, and whether there are cracks on the surface and coating peeling off. Check the sensor installation sealing and test whether the waterproof level (IPX6/IPX7) meets the standard.

2 and performance parameter test

use standard gas to perform zero/span calibration of the equipment to verify the detection accuracy. Simulate step changes in target gas concentration and test response time and recovery time.

0 conduct high temperature (+50℃), low temperature (-40℃), high humidity (95% RH) environmental tests to evaluate the operational stability of the equipment. Test the ability to resist electromagnetic interference and verify signal integrity in complex electromagnetic environments.

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26, safety performance inspection

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4 Check the validity of explosion-proof certification (such as ATEX, IECEx), and test electrical clearance and creepage distance. Simulate sensor failure and test the response time of automatic alarm and safety interlock function (≤2 seconds).

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A chemical factory of the applicant signed an "Online Gas Analyzer Purchase Contract" with an instrument company of the respondent, agreeing to purchase 5 sets of GA-500 equipment to monitor the H₂S concentration in the reactor exhaust gas. Two months after the equipment was put into operation, multiple instruments experienced data jumps (0-100ppm fluctuations), causing the safety interlock system to be accidentally triggered and shut down, causing economic losses. The chemical plant believed that the equipment had a design defect and demanded compensation. The instrument company argued that the problem was caused by complex gas composition or improper operation, and both parties filed suit in court. The court entrusted a third-party appraisal agency to conduct quality appraisal of the equipment involved in the case.

Identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of the "gas analyzer", contract technical agreement, on-site investigation case materials and other data, and made the following quality analysis opinions:

The sensor sensitive materials of the equipment involved were downgraded, and the explosion-proof membrane material did not meet the requirements. The moisture-proof coating process is not up to standard and the anti-interference ability is poor. The explosion-proof certification is invalid and there are safety risks.

Instrument Company failed to provide equipment that met the material and certification requirements as agreed in the contract, which constituted a fundamental breach of contract.

Gas analyzer quality qualification report should include the following content:

1. Equipment appearance description

2. Functional test results

3. Accuracy evaluation results

4. Stability test results