Infrared gas detection alarm device-Fornitore globale

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No. 161 Jinhu West Road, Jinhu County, Jiangsu Province

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Infrared gas detection alarm device

SY-QT-2000NDIR fixed (with on-site display sound and light alarm) infrared gas detector adopts imported infrared digital sensing module, based on adva

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SY-QT-2000NDIR fixed (with on-site display sound and light alarm) infrared gas detector adopts imported infrared digital sensing module, based on advanced NDIR (non dispersive infrared) technology, can detect the concentration values of various gases, and can measure gases such as NH3, CO, CH4, SF6, CO2, SO2, C2H4, C3H8, C4H10, C2H2, etc. This type of detector is characterized by non-interference and intelligence. Simple menu based calibration and modular design and assembly simplify installation, maintenance, and debugging. There are multiple options for communicating with external systems, including 4-20mA, RS-485 data bus and 2 relays. This unique infrared gas detector has been proven to work stably, reliably, and require minimal maintenance through practice.

Application areas include petrochemicals, metallurgy, mining, firefighting, gas, environmental protection, electricity, communication, papermaking, printing and dyeing, grain reserves, urban water supply, sewage treatment, food, brewing, scientific research, education, national defense, unique small plug-in field replaceable sensors, interference free, intelligent detector interface, output: 4-20mA, The RS-485 data bus and two alarm relays require minimal maintenance.

Non dispersive infrared technology (NDIR) is a method based on gas absorption theory. After the infrared radiation emitted by the infrared light source is absorbed by a certain concentration of the gas to be measured, the spectral intensity proportional to the gas concentration will change. Therefore, calculating the change in spectral intensity can be used to invert the concentration of the gas to be measured. NH3, CO, CH4 and other gases have their own characteristic absorption bands in the infrared band, which are distinguishable like fingerprints. By absorbing infrared energy in the characteristic absorption bands, the concentration of the gas can be reflected. When infrared energy passes through a high concentration of the test gas, all infrared energy near its characteristic absorption peak will be absorbed. When there is no gas to be measured on the optical path, infrared radiation has no effect on its characteristic absorption peak. Therefore, gas can be seen as a filter that can absorb infrared energy.

Product parameters:

Input power supply	24VDC
Detection object	optional(Refer to the selection table)
signal output	4-20mAperhapsRS485
Detection Principle	NDIR
Display mode	LCD/LEDdisplay
detection	Diffuse pump suction pipeline type
Alarm method	2Level sound and light alarm
Detection range	optional
alarm error	≤±10%alarm set value
accuracy	±1%FS
operation temperature	-10℃-50℃
Resolution	1%LEL、1%VOL
Working humidity	0-95%RH(No solidification)
Warm-up time	2 Min
compressed air	800-1100hpa
response time	T90≤30S(mostly)
Contact capacity	1A/120VACperhaps1A/24VDC
Repeatability	≤±2%FS

Combustible gas detection indicators

name	Molecular formula	Default low alarm value	Default high alarm value	range
methane	CH₄	20%LEL	50%LEL	0~100%LEL
toluene	C₆H₅CH₃	20%LEL	50%LEL	0~100%LEL
methanol	CH₃OH	20%LEL	50%LEL	0~100%LEL
Methyl formate	HCOOCH₃	20%LEL	50%LEL	0~100%LEL
Ethyl Formate	HCOOCH₂CH₃	20%LEL	50%LEL	0~100%LEL
Ethyl Methyl Ether	CH₃OCH₂CH₃	20%LEL	50%LEL	0~100%LEL
ethane	CH₃CH₃	20%LEL	50%LEL	0~100%LEL
acetylene	CHΞCH	20%LEL	50%LEL	0~100%LEL
ethanol	CH₃CH₂OH	20%LEL	50%LEL	0~100%LEL
ethylbenzene	CH₃CH₂C₆H₅	20%LEL	50%LEL	0~100%LEL
ethylene	CH₂=CH₂	20%LEL	50%LEL	0~100%LEL
methyl acetate	CH₃COOCH₃	20%LEL	50%LEL	0~100%LEL
ethyl acetate	CH₃COOCH₂CH₃	20%LEL	50%LEL	0~100%LEL
butyl acetate	CH₃COOCH₂(CH₂)₂CH₃	20%LEL	50%LEL	0~100%LEL
propane	CH₃CH₂CH₃	20%LEL	50%LEL	0~100%LEL
Propanol	CH₃CH₂CH₂OH	20%LEL	50%LEL	0~100%LEL
propylene	CH₂=CHCH₃	20%LEL	50%LEL	0~100%LEL
acetone	(CH₃)₂CO	20%LEL	50%LEL	0~100%LEL
butane	C₄H₁₀	20%LEL	50%LEL	0~100%LEL
butanone	CH₃CH₂COCH₃	20%LEL	50%LEL	0~100%LEL
butadiene	CH₂=CHCH=CH₂	20%LEL	50%LEL	0~100%LEL
pentane	C₅H₁₂	20%LEL	50%LEL	0~100%LEL
hexane	CH₃(CH₂)₄CH₃	20%LEL	50%LEL	0~100%LEL
heptane	C₇H₁₆	20%LEL	50%LEL	0~100%LEL
octane	CH₃(CH₂)₃CH₃	20%LEL	50%LEL	0~100%LEL
nonane	CH₃(CH₂)₇CH₃	20%LEL	50%LEL	0~100%LEL
benzene	C₆H₆	20%LEL	50%LEL	0~100%LEL
Isobutane	(CH₃)₂CHCH₃	20%LEL	50%LEL	0~100%LEL
isopropanol	(CH₃)₂CHOH	20%LEL	50%LEL	0~100%LEL
1-butanol	CH₃(CH₂)₂CH₂OH	20%LEL	50%LEL	0~100%LEL
cyclohexane	CH₂(CH₂)₄CH₂	20%LEL	50%LEL	0~100%LEL
Cyclopentane	CH₂(CH₂)₃CH₂	20%LEL	50%LEL	0~100%LEL
Propylene oxide	CH₃CHCH₂O	20%LEL	50%LEL	0~100%LEL
ethylene oxide	CH₂CH₂O	20%LEL	50%LEL	0~100%LEL
diethyl ether	(CH₃CH₅)₂O	20%LEL	50%LEL	0~100%LEL
dimethyl ether	(CH₃)₂O	20%LEL	50%LEL	0~100%LEL
xylene	C₆H₄(CH₃)₂	20%LEL	50%LEL	0~100%LEL
gasoline	C₄~C₁₂Hydrocarbon mixture	20%LEL	50%LEL	0~100%LEL
Diesel, kerosene	C₁₀~C₂₂Hydrocarbon mixture	20%LEL	50%LEL	0~100%LEL

Toxic and harmful gas detection indicators

name	Molecular formula	Default low alarm value	Default high alarm value	range
oxygen	O₂	19%VOL	23%VOL	0~30%VOL
ammonia	NH₃	20ppm	50ppm	0~100/500ppm
chlorine	CL₂	1ppm	5ppm	0~10ppm
hydrogen	H₂	50ppm	100ppm	0~1000ppm
hydrogen sulfide	H₂S	10ppm	15ppm	0~20ppm
Hydrogen chloride	HCL	2ppm	5ppm	0~50ppm
hydrogen fluoride	HF	3ppm	5ppm	0~10ppm
hydrogen cyanide	HCN	2ppm	5ppm	0~50ppm
carbon monoxide	CO	50ppm	100ppm	0~1000ppm
sulfur dioxide	SO₂	2ppm	5ppm	0~20ppm
nitric oxide	NO	24ppm	50ppm	0~2000ppm
nitrogen dioxide	NO₂	5ppm	10ppm	0~20ppm
chlorine dioxide	CLO₂	10ppm	15ppm	0~50ppm
methanol	CH₄O	20ppm	40ppm	0~100ppm
formaldehyde	CH₂O	2ppm	4ppm	0~10ppm
benzene	C₆H₆	20ppm	40ppm	0~100ppm
STYRENE	C₈H₈	10ppm	20ppm	0~50ppm
Trichlorosilane	SiHCI₃	10ppm	20ppm	0~50ppm
SILICON TETRACHLORIDE	SiHCI₄	10ppm	20ppm	0~50ppm
sf6	SF₆	200ppm	400ppm	0~1000ppm
carbon dioxide	CO₂	1000ppm	2000ppm	0~5000ppm

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