Custom Gas Analysis Equipment &instruments Manufacturer

As an innovator and standard-setter in China's analytical instrumentation sector, Changai specializes in manufacturing high-performance Gas Analysis Equipment and Gas Analysis Instruments, delivering precise, reliable gas analysis and measurement solutions for global industrial processes. Leveraging six core technology platforms—electrochemistry, spectroscopy, laser (TDLAS), chromatography, thermal conductivity, and advanced sensing—we have built a comprehensive product portfolio encompassing oxygen analysis, dew point monitoring, multi-component gas analysis, online chromatography, and complete pre-treatment systems. Over 200 instrument models are widely deployed across dozens of critical industries including air separation, petrochemicals, metallurgy, semiconductors, environmental protection, energy, food, and pharmaceuticals.

Through the technical depth honed by national-level research projects, we ensure exceptional stability and accuracy in complex operating conditions such as high temperatures, high pressures, and high dust environments. From laboratories to production lines, Chang'ai safeguards process safety, enhances energy efficiency, and ensures product quality with innovative technology and reliable quality, committed to being your trusted analytical measurement partner.

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Reliable CI-PC39 High temperature humidity analysis system

Humidity control function: According to the humidity and concentration control requirements of the test, the system outputs a control signal to adjust the opening of the proportional valve, thereby controlling the gas flow in the process to obtain and maintain the humidity range required by the tested environment. Its advantage is to maintain the maximum quality of the end product with the minimum gas consumption, reducing scrap and rework;

Top CI-PC338 Humidity detector

Using capacitive humidity sensor as the measurement unit, adopting advanced digital processing technology, anti-cross interference, high measurement accuracy and good stability;

Best CI-PC562 Trace hydrogen analyzer

When the hydrogen concentration is higher than the protection concentration, the air pump is automatically turned on to feed air into the sensor; the sensor must try to avoid working in an environment with a hydrogen concentration higher than 1% for a long time to prolong its service life;

Brand CI-PC582 Trace hydrogen transmitter

CI-PC582 Trace hydrogen transmitter

Modern CI-PC502 Selective hydrogen content analyzer

The sensor is specific to hydrogen and has no cross-sensitivity to other gases;

Custom CI-PC512 Selective hydrogen content analyzer

The sensor is specific to hydrogen and has no cross-sensitivity to other gases;

Wholesale CI-PC552-1 Explosion-proof selective hydrogen content analyzer

CI-PC552-1 Explosion-proof selective hydrogen content analyzer Product FeaturesThe sensor is specific to hydrogen and has no cross-sensitivity to other gases;Using capacitive touch buttons, the buttons are sensitive, reliable and easy to operate;Interference gas compensation function: eliminate the influence of interference gas on measurement accuracy;Data storage: support U disk and SD card data storage, large data storage capacity and convenient for users to process and analyze data, the timin...

High quality CI-EM01 Online single gas detection alarm

Anti-reverse connection design, any form of reverse connection will not damage the instrument;Two cable inlets, convenient for on-site installation;Independent air chamber structure, rapid response, excellent long-term stability;Multiple alarm methods Alarm mode settings:

Reliable CI-EM02 Online single gas detection alarm

It can detect 1~6 kinds of factors (including gas concentration,temperature and humidity, particulate matter, etc.) at the same time, and the specific detection type depends on the internal sensor configuration of the instrument;

Top CI-EM03 Portable compound gas detection&alarm

Optional customized model with 5Ah/10Ah/30Ah/50Ah polymer lithium battery, standby time 3-30 days (reserve charging interface and switch button);The specific standby time is related to the quantity, type and wireless mode of gas, which is for reference only;

Best CI-EM300 Gas detection controller and alarms

High-speed, highly integrated microprocessor system, standard ARM architecture core, high performance, low power consumption;

Brand CI-EM506 Portable gas compound analyzer

Can simultaneously detect 1~18gas, the concentration unit is optional: ppm, umol/mol, mg/m³, %VOL, %LEL, pphm, ppb, etc.;

CHANG AI is a world-leading high-tech enterprise in gas analysis and detection, committed to providing customers with world-class gas analysis and detection products and one-stop solutions.

Contact Information

Fax: +86-21-33275656

Tel: +86-21-51692285 / +86-21 400 700 8817

E-mail: info@changai.com / ana@changai.com

Add: No.97, Qibao WanKe International Center, Lane 1333, Xinlong Road, Minhang District, Shanghai, P.R. China. 201101