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Shenzhen Dongri Yingneng Technology Co., Ltd
Fixed ethylene gas detector
NegotiableUpdate on 01/28
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Overview
A fixed ethylene gas detector is a professional safety equipment that is installed at specific industrial locations, continuously monitors the concentration of ethylene gas in the air 24 hours a day, and automatically issues an alarm and triggers safety linkage when the concentration exceeds the standard. Its core components
Product Details
The fixed gas detector continuously detects oxygen, EX gas, and toxic and harmful gases in the atmosphere for 24 hours online and provides sound and light alarms. It not only controls the concentration of gases in special occasions, but also has a warning effect on gas leaks in dangerous sites, timely protecting the safety of life and property in various situations. The detector adopts imported sensors combined with high-speed and high-precision processing circuits, which have the advantages of stable signals, high accuracy, and good repeatability. It also adopts explosion-proof design and is suitable for various hazardous situations. The instrument outputs various standard signals and is compatible with various alarm systems, PLC, DCS and other control systems. Instruments are widely used in industries such as petroleum, chemical, metallurgy, fire protection, coal mining, electricity, ships, environmental protection, telecommunications, and medical care.
It is a professional safety equipment installed at specific industrial sites, which continuously monitors the concentration of ethylene gas in the air 24 hours a day, and automatically issues an alarm and triggers safety linkage when the concentration exceeds the standard. Its core components
A complete fixed ethylene gas detection system typically consists of three parts:
Detection probe (sensor)
Role: The "nose" of the system.
Location: Install directly in areas where ethylene leakage is most likely to occur, such as near pipeline interfaces, valves, pumps, reaction vessels, or spaces where gas is prone to accumulate.
Function: Continuously perceive the concentration of ethylene in the air.
Alarm controller (host)
Role: The 'brain' of the system.
Location: Installed in secure areas such as manned control rooms and duty rooms.
Function: Receive and display real-time concentration data from all probes, determine whether the concentration exceeds the preset alarm value, and be responsible for initiating sound and light alarms and linkage control.
Acoustic-optic alarm light
Role: The "mouth and signal flag" of the system.
Location: Installed at a prominent height on site and in the factory area.
Function: When the alarm is triggered, it emits a strong rotating flash and high decibel beep sound to issue an emergency evacuation warning to on-site personnel.
Its main purpose and function (why is it needed?)
The function of a fixed ethylene detector is far more than just a simple alarm, it is an active safety protection system:
1. Preventing fires and explosions - core mission
Ethylene properties: Ethylene is an extremely flammable gas with a low lower explosive limit (LEL) of 2.7%. It can be ignited with minimal energy, such as static electricity or electric sparks.
Instrument function: It can monitor ethylene concentration online and issue warnings before the concentration reaches a dangerous level (usually set at 20% -25% LEL), providing critical time for personnel disposal and evacuation, thereby avoiding catastrophic accidents.
2. Implement early leak detection
It can sensitively capture small, initial ethylene leaks and accurately locate the leak point on the control room screen, helping maintenance teams respond quickly, repair the leak source, and prevent the leak from expanding and causing production interruptions or greater risks.
3. 24-hour continuous monitoring to fill the manual gap
There is a time blind spot in manually using portable detectors for inspection. Fixed instruments ensure that critical equipment areas are monitored at all times, including nighttime and holidays.
4. Automatic linkage control, actively eliminating risks
This is where it is much more powerful than portable devices. When a hazardous concentration is detected, the system can automatically perform the following operations:
Start the accident exhaust fan and forcefully ventilate the diluted gas.
Close the emergency shut-off valve and block the ethylene gas source.
Stop relevant production equipment and eliminate potential ignition sources.
Linkage fire protection system.
5. Meet the requirements of safety production regulations
In industries involving ethylene such as petrochemicals and polyethylene production, installing fixed gas detectors is a mandatory requirement of national and industry safety production regulations, and is one of the prerequisites for obtaining safety production permits.
1．How to choose a fixed styrene gas detector?According to technical specifications
Shell material: Aluminum alloy explosion-proof shell
Dimensions: 125X106X153
Explosion proof level: Ex d IIC T6
Protection level: IP66
Whole machine weight: 1.8Kg
Accuracy: ± 1% F.S
LCD display content: measuring gas name, real-time numerical value, 50 segment bar chart displaying real-time gas concentration, gas full range, gas internal parameters
LCD display modes: ppm, ppb, mg/m3, ug/m3,% VOL,% LEL
Working environment temperature: -20~50 ℃
Working environment humidity: 10~95% RH Non condensing
Analog signal output: Three wire system 4-20mA linear output
Digital signal output: Standard RS485 signal output, compatible with Moden and communication software to communicate with computers
Working voltage: 24VDC (12~30VDC)
Basic working current: 11mA@24V (toxic gas and oxygen), 33mA@24V (Catalytic combustion, infrared sensor)
2.How to choose a fixed styrene gas detector?Installation location
According to the specific gravity and wind direction of the gas, the detector should be installed within one meter of the possible gas leakage location. This way, the actual response speed of the detector is relatively fast. Otherwise, there may be a situation where the concentration of combustible gas or toxic and harmful gas at the installation location of the detector does not exceed the standard, but the local gas at the leakage point has already exceeded the standard, and the detector and the host cannot give an alarm.
The installation height of the detector above the ground should be greater than 30 centimeters to prevent water splashing in. In general, for detecting harmful gases with a specific gravity lower than that of air, the probe should be installed above the house or equipment; For harmful gases with a specific gravity greater than that of air, the probe should be installed close to the ground.
The probe of the detector should be installed facing downwards. If installed outdoors, a rain shield should be added above the detector.
Note:
The detection range of each probe in the open area is 60 square meters, and factors such as gas diffusion, wind direction, temperature, humidity, and area enclosure should also be considered.
During installation, protective measures such as dust, water, and high temperature prevention should also be considered.
3.1 Installation method
Users can design their own fixed methods. However, it is important to ensure that the sensor surface of the probe is perpendicular to the ground. After fixing the probe, remove the screws on the upper cover of the housing and insert the shielded (three core 3 × 1.5mm) transmission cable through the wiring channel. It is recommended to use shielded soft core (three core 3 × 1.5mm) cable and connect the cable to the terminal position. After checking that the wiring is secure, fix the cable and the upper cover of the housing.
