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The main function:
◆ Unique LCD with backlight design technology can display measurement information under any lighting conditions;
◆ Support PPM and mg/m3 , %VOL and mg/L concentration units to switch freely;
◆ The gas chamber is made of military-quality high-strength aluminum profile, which is wear-resistant and corrosion-resistant, and is suitable for complex and harsh industrial environments. The reasonable and scientific design of the gas chamber ensures the accuracy of real-time monitoring of the sensor;
◆ The short-distance RTU wireless transmission method or the GPRS wireless transmission method with unlimited distance anywhere can transmit real-time detection data and alarm status to the safety center through the built-in wireless module function (optional) ;
◆ The explosion-proof grade is Exd II CT6 , certified by the National Explosion-proof Electrical Inspection Center.
Technical Parameters
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product name |
Fixed-line gas detector |
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Product number |
AGP850-CH20 |
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Gas detection |
Formaldehyde (CH20) in the air |
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Detection principle |
Principles of Electrochemistry |
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Measuring range |
0 ~ 5ppm , 0 ~ 10ppm , 0 ~ 50ppm , 0 ~ 100ppm , 0 ~ 1000ppm optional |
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resolution |
0.01ppm (0～100ppm); 0.1ppm (0～999ppm); 1ppm (1000ppm and above) |
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Sampling method |
①Free diffusion—on-line continuous detection, free diffusion detection method; |
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②Suction type—external air pump can be equipped with a flow-through adapter for air in and out or a built-in air pump to realize the pump-suction detection method (air pump is optional) |
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installation method |
Wall-mounted type; pipe type (sub-holding type, intubation type, pipe type external thread: M45X1.5mm, optional pipe adapter screw joint, can be welded); |
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Indication error |
≤± 3% FS (higher accuracy requirements based on sensor performance) |
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repeatability |
≤± 1% |
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zero drift |
≤± 1% ( FS/ year) |
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Response time |
≤ 20 seconds ( T90 ), (higher requirements according to sensor performance) |
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Recovery Time |
≤30 seconds (higher requirements based on sensor performance) |
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Power supply |
12～30VDC |
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Power |
≤2.5W（DC24V） |
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Environmental pressure |
86kPa～106kPa |
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ambient temperature |
-20°C～+55°C (typical value) -40°C～+70°C (limit value) (Higher temperature and humidity detection environment can choose our pre-pretreatment gas monitoring system) |
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ambient humidity |
10% ~ 95%RH (no condensation) |
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The main material |
①Shell: ADC12 aluminum alloy, Teflon paint, wear-resistant and corrosion-resistant ( 316 stainless steel shell is optional for complex and harsh environments) ②Air chamber: High-strength wear-resistant and corrosion-resistant aluminum profile is used, which is durable ( 316 stainless steel air chamber can be selected for complex and harsh environments), and the outer thread of the air chamber is M45*1.5 ; |
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output signal |
① Three-wire 4-20mA current signal output, which can be connected to various alarm controllers, PLC, DCS and other control systems; ②RS-485 digital signal output, connect to RS232 transfer card to view the stored data on the computer; ③2 sets of relay high and low section alarm switch output (1 set standard , 1 set optional ) : passive contact, capacity 30V 1A , 125VAC 0.5A ; |
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Signal transmission Way |
① Three-core (four-core) shielded cable transmission: the longest transmission distance is 1000 meters to 2000 meters (single core 1 square shielded cable); ②Network port TCP/IP transmission: support TCP/IP protocol, can be transmitted within 90 meters by network cable, long-distance real-time transmission through networking (optional); ③ Optical fiber transmission: the longest transmission distance is 20 kilometers to 40 kilometers (optical cable single-mode multi-core transmission, must be equipped with optical fiber MODEM), and can be networked (optional); ④Short-distance RTU433 wireless transmission: the transmission distance is 0 to 2 kilometers, depending on the transmission power and the site environment (optional); ⑤GPRS wireless transmission: no distance limit, built-in module, through mobile, China Unicom or telecom signal transmission, with SMS reminder notification function (optional); |
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Alarm method |
Sound and light alarm, optional sound and light alarm, alarm sound: < 90 decibels |
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Alarm point setting |
A1 alarm value, A2 alarm value; |
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display screen |
LCD liquid crystal display |
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button mode |
Remote control + 3 key operation |
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direct reading |
Measurements |
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calibration |
Full software target point calibration function, calibration calibration value can be set, one-key zero adjustment |
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Explosion-proof electrical Connection thread |
① NPT3/4 to internal thread (optional 1/2NPT , G3/4 , G1/2 to internal thread) ② Explosion-proof cable stuffing box (optional, explosion-proof certification); |
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Explosion-proof mark |
Ex d II CT6 Gb |
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degree of protection |
IP6 5 |
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size |
210mm high x 175mm wide x 85mm thick |
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weight |
About 1.8Kg (aluminum alloy shell) |
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Executive standard |
GB15322.1-2003 , GB3836.1-2010 , GB3836.2-2010 , GB3836.4-2010 |
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quality assurance |
One year warranty period, free maintenance during the warranty period. |