1. Ethylene oxide gas characteristics:
Ethylene Epoxyethane C<sub>2</sub>H<sub>4</sub>O molecular weight 44.05. Also known as ethylene oxide and oxane. One of the simplest cyclic ethers. It is a colorless gas at room temperature. There is an ether-like smell. At low temperature, it is a colorless and flowable liquid. The relative density of the liquid is 0.8711. rondian-111.3℃。 Boiling point 13.2°C (9.95*10PA). Refractive index 1.3597 (7°C). Flash point -20°C. The ignition point is 429°C. The critical temperature is 195.8°C. The critical pressure is 7.19MPA. It forms an explosive mixture with air, with an explosion limit of 2.6%~100%. It is soluble in water and most organic solvents such as ether, ethanol, acetone, carbon tetrachloride, etc. Chemical properties are reactive. It can carry out reactions such as hydration, ammonia, oxidation, reduction and polymerization. reacts with water to form ethylene glycol; reacts with acids to form esters; reacts with alcohols to form ethers; reacts with ammonia to form alcohol amines; It can also be polymerized into linear polymers. Still. When in contact with base metals or highly active catalysts (such as aluminum and iron anhydrous pentaoxide), it will release a large amount of heat and can cause combustion or explosion. Poisonous! Inhalation can form formaldehyde and glyoxate in the body, which have a damaging effect on the central nervous system. Important chemical raw materials, used in the manufacture of ethylene glycol, ethanolamine, surfactants, plasticizers, lubricants, etc. It can be produced by direct catalytic oxidation of ethylene.
2. Application fields of ethylene oxide gas detection equipment:
Electronics, petroleum, petrochemical, chemical, metallurgical, electric power and various other industrial environments.
Permissible concentrations of toxic substances in the workplace air
PC-TWA time-weighted average allowable concentration (8 hours).
PC-MAC maximum allowable concentration refers to the concentration that should not be exceeded at any time in a business day.
PC-STEL is exposed to allowable concentrations for a short time (15 minutes).
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Serial number
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Chinese Name (CAS NO.)
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TWA
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MAC
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*STEL
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mg/m3
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ppm
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mg/m3
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ppm
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mg/m3
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ppm
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1
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Ethylene oxide (75-21-8)
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2
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1.1
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--
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--
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5*
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2.8
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III.Principle of harmful gas sensor and its characteristics:
1. Overview of harmful gas sensing:
It is diffusion; Hazardous gas sensors are devices that convert the content of harmful gases in the air into electrical signals. The electrical signals generated by the sensor are processed and amplified by electronic circuits and used in the field, which are affected by various harsh environments and atmospheres, especially the sensors of fixed instruments, which operate continuously for a long time, and have the limitations of explosion-proof and power supply capacity, so the requirements for hazardous gas sensors are very strict. After conversion, the display and alarm of harmful gas content are realized
。
Product highlights:Adopt high-quality imported electrochemical sensor, short response time and long service life;
Explosion-proof housing, rugged and durable;
High reliability and accuracy, good anti-interference;
Good performance-price ratio.
4. Refer to the selection to determine the use occasion:
1、 In order to prevent the leakage of the tiny content of ethylene oxide, which can cause safety accidents,
Suggested use: Atai Jihua Ethylene Oxide Detection Equipment:
JHAT-FM-ETO Ethylene Oxide Detection Probe/Transmitter) + AT-1/2/4/8 (Alarm Control Host)
JHAT-FS-ETO (Ethylene Oxide Detection Probe/Transmitter) + AT-1/2/4/8 (Alarm Control Host),
This model transmitter has a live display.
It is used to monitor ethylene oxide preparation workshops, storage rooms and other places.
The specific parameters of the equipment are as follows:
Ethylene oxide detection probe/transmitter: Bus to ethylene oxide detection probe/transmitter:
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How it works:
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Semiconductors
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Detection range
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0-100/200/1000ppm
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Output signal
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4-20mA standard signal output
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Connect the cable
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2-core shielded cable
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Explosion protection
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Ex d IIC T6
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Ingress protection
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IP66
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Power supply
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24V DC
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How it works:
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Semiconductors
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Detection range
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0-100/200/1000ppm
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Output signal
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RS485
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Connect the cable
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4-core shielded cable
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Explosion protection
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Ex d IIC T6
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Ingress protection
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IP66
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Power supply
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24V DC
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2. If there are many release sources or large areas to be detected (more than 8 points), please select:
Antai Jihua bus systemEthylene oxide detection probe/transmitterJHAT-FZ-ETO。 See the table above for specific parameters:
Compared with JHAT-FM-ETO, the advantages are: simple installation, saved wiring costs, and easy unified control.
3. In places where online testing is not required, portable can be selectedEthylene oxide detection alarm device(JHAT-FH-ETO)。For specific product parameters, please refer to the product information.
Product selection table: