Description
Gas detector CRH-80 series is a new type gas combustible or toxic gas detector which used high performance gas sensor and microcontroller technology. It has following advantages: good repeatability, high resistance to humidity-temperature jamming, long performance life and simple operation. It is applied to inspection for combustible or toxic gas concentration in industrial environments.
It can translate the combustible gas concentration signals into electric current signals or digital signals for outputting and transmitting. It adopted three-wire (4~20mA signals output) or four-wire (RS485 bus output) system, remotely examine the detection result through the monitor or controller. Common applications is gas safety inspection and alarm for industrial scene, such as petroleum refinery, chemical plants, LPG stations, boiler rooms, gas stations, paint spray booths, medical industry, labs, etc.
Features:
l High sensibility, rapid response, short polarization time;
l 4-20mA standard analog signal or RS485 digital signal output;
l Two-level passive contact output;
l Infrared remote controller operation (remote controller is optional part);
l Possible to connect to DCS system directly;
l Explosion-proof design complies with the requirement of applying in Zone 1,2.
Technical Specifications
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Applicable Gas
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Combustible gas or toxic gas
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Detecting Range
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Referring to the targeting gas list
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Alarm Threshold
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Adjustable
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Sampling
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Diffusion
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Sensor Type
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Catalytic combustion sensor for combustible gas
Electrochemical sensor for toxic gas
Infrared sensor for carbon dioxide gas
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Sensor Life
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3 years for catalytic combustion sensor and electrochemical sensor;
5 years for infrared sensor.
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Response Time (T90)
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≤30s
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Operating Environment
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Temperature: -40℃~70℃ (catalytic combustion sensor)
-20℃~50℃ (electrochemical sensor)
Humidity: ≤95%RH (non-condensing)
Pressure: 86kPa~106kPa
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Working Voltage
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DC 24V±6V
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Power Consumption
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≤3W
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Output Signals
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Three-wire system 4~20mA standard signals output;
Four-wire system RS485 signal output (optional);
Contact relay output.
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Installation Means
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Wall mounted
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Transmission Distance
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≤1000m
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Explosion-proof Type
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Explosion insulating
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Explosion-proof Index
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Ex d IIC T6 Gb
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Protection Grade
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IP65
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Install Screw Thread
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M20*1.5 (Female Screw)
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Cable
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RVVP 1.5mm2×3 or RVVP 1.5mm2×4
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Transmit Distance
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≤1000m
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Dimension
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180 mm×140 mm×80 mm
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Weight
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About 1Kg
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Targeting Gas List
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Gas
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Detecting Range
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Alarm Threshold
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Sensor Type
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NH3
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0-100 PPM
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25 PPM / 50 PPM
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Electrochemical sensor
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Cl2
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0-50.0 PPM
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10 PPM / 20 PPM
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H2
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0-1000 PPM
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50 PPM / 100 PPM
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CH2O
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0-100 PPM
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25 PPM / 50 PPM
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O2
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0-30.0%vol
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18.5%vol / 23.5%vol
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H2S
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0-100 PPM
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10 PPM / 20 PPM
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HCl
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0-30.0 PPM
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5.0 PPM / 10.0 PPM
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HCN
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0-50.0 PPM
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5.0 PPM / 10.0 PPM
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PH3
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0-20.0 PPM
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0.3 PPM / 0.6 PPM
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HF
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0-10.0 PPM
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3.0 PPM / 6.0 PPM
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NO
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0-250 PPM
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25 PPM / 50 PPM
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CO
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0-500 PPM
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35 PPM / 70 PPM
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SO2
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0-20.0 PPM
0-2000 PPM
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2.0 PPM / 10.0 PPM
10 PPM / 20 PPM
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ClO2
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0-50.0 PPM
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0.3 PPM / 0.5 PPM
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NO2
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0-20.0 PPM
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1.0 PPM / 2.0 PPM
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C2H4O
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0-100 PPM
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10 PPM / 20 PPM
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O3
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0-20.0 PPM
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5.0 PPM / 10.0 PPM
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CH4
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0-100%LEL
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25%LEL / 50%LEL
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Catalytic combustion sensor
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C3H8
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0-100%LEL
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25%LEL / 50%LEL
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H2
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0-100%LEL
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25%LEL / 50%LEL
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NH3
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0-100%LEL
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25%LEL / 50%LEL
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C2H4O
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0-100%LEL
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25%LEL / 50%LEL
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CH3CH3
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0-100%LEL
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25%LEL / 50%LEL
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C2H4
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0-100%LEL
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25%LEL / 50%LEL
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C4H10
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0-100%LEL
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25%LEL / 50%LEL
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C4H8
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0-100%LEL
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25%LEL / 50%LEL
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C7H8
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0-100%LEL
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25%LEL / 50%LEL
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CH4O
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0-100%LEL
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25%LEL / 50%LEL
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C2H6O
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0-100%LEL
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25%LEL / 50%LEL
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C3H4O
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0-100%LEL
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25%LEL / 50%LEL
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C2H7N
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0-100%LEL
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25%LEL / 50%LEL
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CH3Br
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0-100%LEL
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25%LEL / 50%LEL
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CO2
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0-10.0%vol
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1.0%vol / 3.0%vol
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NDIR infrared sensor
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0-5000ppm
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800 PPM / 1500 PPM
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CH4
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0-5.0%vol
0-100%vol
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1.0%vol / 3.0%vol
5%vol / 10%vol
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VOC
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0-300ppm
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customized
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PID sensor
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