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Name:FIX-3500 online gas monitoring central processing system
Detection range:0~10ppm, 0~20ppm, 0~50ppm, 0~100ppm, 0~500ppm, 0~1000ppm, 0~2000ppm, 0~10000ppm, 0~100%VOL, 0~100%LEL(optional)
Resolution:0.01ppm(0~100ppm); 0.1ppm(0~1000ppm); 1ppm(>1000ppm); 0.1%LEL; 0.01%VOL
Accuracy:≤±3% F.S.
Repeatability:≤±1%
Response time:≤20s(T90)
Explosion proof:ExdⅡCT4 Ga (Intrinsically Safe)
NameOnline gas monitoring central processing system
System compositionPre-treatment system and high-precision high-performance gas monitoring and analysis system
ModelFIX-3500    
Detection gasSimultaneous detection of 1-2 gases, such as VOC, TVOC, ammonia, sulfur dioxide, carbon monoxide, hydrogen sulfide, carbon dioxide, nitrogen oxides, oxygen, stupid, nitrogen, methane, hydrogen fluoride, hydrogen chloride, chlorine, nitrogen monoxide, dioxide toxic and harmful gases.
Working principlePID, infrared, electrochemical
Measuring range0~10ppm, 0~20ppm, 0~50ppm, 0~100ppm, 0~500ppm, 0~1000ppm, 0~2000ppm, 0~10000ppm, 0~100%VOL, 0~100%LEL(optional)
Detection methodFixed online long-term continuous detection, pumped circulation detection method
Installation①Wall mounted   ②Ground pole
Pump (UK imported)① pump flow rate: 8L/min
②Life:18000~20000 hors
③Pumping distance:20~30m
Oil-water dust filter① Filter pore size 5μm, harsh environment needs regular maintenance and cleaning
② Note: The tar-containing environment in the test environment is very harsh. The oil environment is very harsh. It needs to be separately equipped with filter assembly outside the system.
Explosion-proofExd II CT6
Explosion-proof No.CNEx15.1284
ProtectionIP66
Signal output①3-wire, 4-20mA, can connect with various alarm controllers, PLC, DCS control systems.
②RS-485

③2 groups relay H/L alarm switch output

Passive contact, capacity220VAC 3A or 24VDC 3A

Transfer method①Three-core (four-core) shielded cable transmission, can transfer from 1000 meters to 2000 meters (single-core 1mm2 shielded cable)
②Short-distance RTU433 wireless transmission, transmission distance of 300 meters to 3000 meters, depending on transmission power and on-site environment (optional, built-in module within 300 meters distance, external module for longer distance)
③GPRS(optional, built-in module)
Working temp-20℃~+500℃(high temp is customized)
Working humidity0~100%RH, condensing environment is ok
Power supply220VAC
Working pressure≤200Kpa (pressure reducing valve is optional)
Sampling flow ratematch with flow meter, 1-5L/min can be adjusted freely
Dimensions690mm*430mm*145mm
Weight20Kg
Executive standardGB15322.1-2003, GB3836.1-2010, GB3836.2-2010, GB3836.4-2010
Quality assuranceOne year
MaintenanceIf the environment is too much oil and dust is too much, the system must be cleaned and maintained regularly.


◆ This system consists of two parts: pre-treatment system (including constant temperature and humidity treatment control device, oil-water filtration device) and high-precision high-performance gas detection and analysis system.

◆ The system is highly integrated, the overall volume is small, and the installation is convenient;

◆ Original imported high-performance sensor, long service life; can monitor more than 2-3 kinds of gas at the same time;

◆ Embedded 32-bit ultra-low power microprocessor, fast response, high measurement accuracy, good stability and repeatability;

◆ Automatic protection against high concentration gas impact, with good anti-interference performance;

◆ Full software automatic calibration function for target points from level 2 to level 3;

◆ The detector is equipped with an infrared remote control, which realizes full menu operation through the remote control, without opening the cover, which is simple and convenient;

◆ Three-wire system 4 ~ 20mA output and RS485 signal output, relay output, data recovery, data storage and other functions;

◆ Support PPM, %VOL, mg/m3, mg/L concentration units to switch freely;

◆ Two cable inlets for on-site installation;

◆ Analytically detected gas can be returned to the pipeline again through the monitoring system; achieve zero emissions, safer and more environmentally friendly!

◆ First-class mechanical design, the air chamber adopts military-quality high-strength aluminum profiles, wear-resistant and turbid, suitable for complex and harsh industrial environments, reasonable and scientific air chamber design, to ensure the accuracy of real-time monitoring of sensors;

◆ Short-distance RTU wireless transmission mode or GPRS wireless transmission method with unlimited distance anywhere can transmit real-time detection data and alarm status to the security center through the built-in wireless module function (optional);

◆ Explosion-proof grade is Exd II CT6, national explosion-proof electrical inspection center certification, explosion-proof certificate number: CNEx15.1284


The online gas monitoring central processing system is a gas monitoring and processing solution for complex environments with high temperature and humidity and mixed oil and water in industrial production process. The system integrates pre-processing and gas detection and analysis, and is highly integrated. The detection system adopts intelligence. Original imported sensor, fast response, high measurement accuracy, good stability and repeatability; the explosion-proof product certification passed by the National Explosion-proof Electrical Inspection Center can be applied to various dangerous industrial sites. Can be widely used in environmental protection, metallurgy, petroleum and petrochemical, municipal, chemical and other industries, toxic and harmful gas emissions monitoring and process control.

Food & Beverage

Power Generation

Life Sciences & Medical

Pulp & Paper

Oil & Gas

Mining Minerals & Metals

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