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Gas detector-SC910N

Author: source: Release date: 2016-12-05

Gas detector-SC910N

Product parameters

SC910 point-type flammable gas detector with a measuring range of 0% to 100% LEL is a gas detection device installed in an explosive hazardous environment. It converts the on-site flammable gas concentration into a data signal and transmits it to the flammable gas located in a safe area. Alarm controller (host) to achieve the purpose of monitoring the concentration of on-site flammable gas.
The detector can be widely used in chemical, petroleum, metallurgy, oil depots, liquefied gas stations, painting operations, gas transmission and distribution, and other indoor and outdoor hazardous places such as fuel production, storage, and use.
Use SC910 point type combustible gas detector to detect the leakage situation. When the leaked combustible gas concentration reaches the set value (generally 25% LEL), the output contact of the alarm controller is closed, and an external gas alarm controller and fire alarm controller can be connected. , Exhaust fans, pipe shutoff valves and other equipment. Prevent explosions and fire accidents, thereby ensuring the safety of life and property.
The SC910 point type combustible gas detector uses an advanced microprocessor as the control unit, with fast response speed and long average trouble-free operation time, suitable for long-term uninterrupted operation. At the same time, it automatically adds probe fault detection and uploads alarm controller alarm Features. The electrical performance of the SC910 point type combustible gas detector conforms to national standards, passed the inspection of the National Fire Safety Electronic Product Quality Supervision and Inspection Center, and obtained the type approval certificate issued by the National Fire Safety Product Quality Certification Committee. Its structure is flameproof, designed in compliance with national standards, and qualified by the National Explosion-proof Electrical Product Quality Supervision and Inspection Center. The explosion-proof mark is dIIBT6.

可燃气体探测器

Sensing principle Catalytic combustion
Sampling method Natural diffusion
Induction gas CO
Operating Voltage DC24V
Use voltage range DC18V ~ DC28V
Wire 4-20MA communication protocol, 485
temperature -40 ℃ ~ + 70 ℃
Relative humidity ≤93% RH
Explosion-proof mode Flameproof
Explosion-proof grade ExdIICT6
stability Working alarm concentration error is not greater than ± 3% LEL
Repeatability Repeated test alarm concentration error is not greater than ± 3% LEL
Alarm concentration error Not more than ± 3% LEL
Implementation standards GB15322.1-2003
    Detector installation position
  • A. The installation height of the detector is determined by the weight ratio of the type of gas being measured. The specific gravity of the measured gas is less than air, and the detector is generally installed 30cm from the ceiling;
  • 可燃气体探测器安装
  • If the ceiling is high (above 5 meters), it should be installed at an appropriate height depending on the speed of gas leakage. The specific gravity of the measured gas is greater than that of the air, and the detector is installed 30cm ~ 50cm away from the ground
  • B. The installation position of the detector is determined by the source of the gas leak and the structure of the place.  
    First determine the area of the monitored location and leak-prone points, so as to determine the number of detectors installed. In general, the detection range of the detector is 7.5 meters in the indoor radius; 15 meters in the outdoor radius; the linear distance between the detector and the release source is 5 to 7.5 meters. (Recommended installation radius of 1-2 meters in hazardous locations)
Maintenance guide
  • 1. Do not spray insecticide, qualitative hair spray, paint adhesive, thinner alcohol and other flammable and explosive substances on the sensor head.
  • 2. Do not apply paint or other substances to the surface of the explosion-proof net of the sensor module, so as to avoid volatile substances affecting the life of the detector and hindering the diffusion of gas.
  • 3. Do not place in or near the exhaust pipe or chimney.
  • 4. Do not place in places with high temperature and machine overtime.
  • 5. If a failure occurs, do not disassemble and repair it by yourself, you can notify the supplier or agent to deal with it.

Precautions

  • 1. Detectors stored in a temperature below 0 ° C should be placed in a room temperature environment for more than 2 hours before being powered on.
  • 2. Detectors that have not been used for a long time should be used normally after being warmed up for 2 hours.
  • 3. Pay attention to rain, moisture and strong vibration and impact during transportation.
  • 4. The installation of the detector must be performed by professionals: the detector should not be installed close to the wall, and sufficient space should be left around for routine maintenance and troubleshooting. When monitoring flammable gas whose specific gravity is less than air, the detector should be installed 0.3m away from the ceiling, and when monitoring flammable gas whose specific gravity is greater than air, the detector should be installed 0.3m away from the ground.
  • 5. The detection range of the detector in the specific environment is related to many factors, such as the type of gas being detected, the wind direction and wind speed in the detection environment. The recommended detection range is 6 × 6 square meters in space and 6 meters in length.
  • 6. In new buildings, the detector should be installed after painting and welding work is completed.
  • 7. Do not install the detector near steam or oil.
  • 8. Do not immerse the detector in water or other liquids.
  • 9. Do not use irritating substances such as pesticides, paints, and large amounts of alcohol near the detector to avoid false alarms.
    10. Avoid frequent high concentration flammable gas shock sensors during use.
  • 11. The service life of the sensor is 5 years under normal conditions. Improper installation, use or the influence of bad environment will reduce the sensitivity of the sensor and shorten its service life.

Attachment 2: (up pull the switch to 0, pull down to down 1)

可燃气体探测器拨码

number 1 1000000 number 6 0110000 number 11 1101000 Number 16 0000100
number 2 0100000 Number 7 1110000 12th 0011000
number 3 1100000 number 8 0001000 no. 13 1011000
No 4 0010000 No.9 1001000 14th 0111000
Number 5 1010000 No. 10 0101000 15th 1111000
可燃气体探测器
Gases and vapors Ignition temperature ℃ Specific gravity of gas (air = 1)
Lower limit VOL% VOL%
hydrogen 560 4.0 75.6 0.07
Methane 537 5.0 15 0.55
Ethane 515 3.0 15.5 1.04
Propane 260 2.1 9.5 2.50
Isobutane 555 1.8 8.0 2.01
Pentane 470 1.4 7.8 1.56
Hexane 455 1.1 7.5 1.11
Acetylene 305 2.5 100 0.9
Ethylene 425 2.7 36 0.97
Acrylic 430 2.0 11.1 3.45
Toluene 535 1.2 7.1 3.18
benzene 365 1.3 7.1 2.05
O-xylene 465 1.0 6.0 3.66
Methanol 233 6.7 36 2.79
Ethanol 425 3.3 19 1.59
Methyl acetate 475 3.1 16 2.56
Ethyl acetate 460 2.2 11.0 3.04
gasoline 260 1.1 5.9 3-4
kerosene 210 0.6 5 4.50
natural gas 3.8 13 <1
City gas 4 30 <1
liquefied petroleum gas 1.0 15 1.5-2.0
Hydrogen sulfide 4.3 45.5 1.19
Carbon monoxide 605 12.5 74 0.97
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