Explosion-proof pressure transducers are used in flammable and explosive places. Choosing a suitable explosion-proof pressure transducer is very important for construction safety. Many explosion accidents are caused by choosing the wrong explosion-proof pressure transducer. This article will introduce you to explosion-proof pressure transducers.
Warning Case of Incorrect Selection of Explosion Proof Pressure Transducers
In 2023, an explosion occurred in an ethylene plant. The explosion-proof transducer of the plant has ATEX/IECEx dual certification. However, the certification test of explosion-proof pressure transducers only covers methane environments. The actual working conditions of the ethylene plant contain 3% hydrogen sulfide. Eventually, the pressure range was exceeded. Causes the 316L diaphragm to rupture due to hydrogen embrittlement.
In 2024, a refinery chose a non-explosion-proof connector to save ￥480. Cause benzene vapor to enter the control room along the cable. The accident caused 7 deaths and 13 injuries.
Features of Explosion Proof Pressure Transducer
- The shell adopts isolated explosion-proof design
- The circuit adopts intrinsically safe explosion-proof design
- The circuit adopts signal isolation amplification and cut-off frequency interference design
- Strong anti-interference ability, lightning protection
- Overvoltage protection, current limiting protection,
- Impact resistance, corrosion resistance, compact and flexible, etc.
- With medium compatibility
- With temperature and pressure compensation
- High measurement accuracy
Principle of Explosion Proof Pressure Transducer
This transducer detects changes in pressure to determine whether there are safety hazards. When the pressure exceeds the preset range. the sensor will immediately sound an alarm to remind the staff to take measures.
The working principle is to use pressure changes to trigger the internal circuit. Thereby sending a signal to the control system.
Explosion Proof Pressure Transducer Applications
Explosion-proof pressure transducers have excellent explosion-proof characteristics. They have been widely used in many industrial fields. These fields cover many industries. Such as water conservancy and hydropower. railway transportation. intelligent buildings. production automation control. aerospace. military industry. petrochemicals. oil wells. electricity, ships. machine tools and pipelines.
Differential pressure explosion-proof pressure sensors play an important role in pressure process control. It is widely used in textile workshops, boiler air supply, underground ventilation. And other scenes involving electricity and coal.
At the same time, it is also indispensable in the pressure control link of industries. such as spinning cotton boxes and dust removal equipment. It is precise pressure measurement and reliable explosion-proof performance. Guarantee for the safe production and stable operation of these industries.
Precautions for Installation of Explosion Proof Pressure Transducer
There are some things to note during the installation of explosion-proof pressure sensors. For example, explosion-proof transmitters must comply with explosion-proof regulations during installation. The measured medium is not allowed to freeze. otherwise it will damage the isolation diaphragm of the sensing element. And it causes damage to the transmitter. Finally, it should be installed as much as possible in a place.
Of course, there are some small details that we need to pay attention. The specific problems depend on the on-site environment. Different environments require different problems.
Maintenance Methods for Explosion Proof Pressure Transducer
1. Regularly check whether the sensor is loose or damaged. And immediately repair any problems found. If the sensor is found to be outdated or damaged, the sensor must be replaced.
2. Clean the sensor housing and make sure there is no dust, grease or other dirt around the sensor. These substances may interfere with the performance of the sensor. Cause incorrect readings.
3. Check whether the cable connection is firm. And eliminate possible cable disconnection or poor contact problems.
4. If the sensor is not used for a long time, store it in a dry, clean and light-proof place. Protect the sensor from dust, humidity, ultraviolet rays and other factors.
5. When installing, maintaining or replacing sensors, be sure to follow relevant safety regulations. For example, wear anti-static gloves and clothing, avoid using metal tools, etc.
Explosion Proof VS Flame Proof Pressure
Explosion-proof types are divided into increased safety type and intrinsic safety type. Increased safety , intrinsic safety and flame proof are three common explosion-proof types. They have unique characteristics and applicable scenarios.
1. The difference between increased safety type and intrinsic safety type.
Working principle:
Increased safety explosion-proof technology strengthens the sealing and electrical performance of the equipment. Prevent arcs, sparks or dangerous high temperatures under normal working or overload conditions. It focuses on improving the safety of the equipment itself. Reduce the risk of causing an explosion.
Intrinsic safety explosion-proof technology limits the energy in the circuit. Ensure that no ignitable sparks or high temperatures are generated in hazardous environments. It requires that the sparks and thermal effects. It is generated by the circuit of the equipment. Under normal working or specified fault conditions cannot ignite the specified explosive mixture.
2. Application
Increased safety equipment is suitable for Zone 2 in explosion-hazardous areas. That is, an environment where there is no explosive gas mixture during normal operation. They are usually used for some equipment that does not produce sparks in non-fault conditions. such as junction boxes, lamps, etc.
The scope of application of intrinsically safe equipment is wider and can be used in Zone 0, Zone 1 and Zone 2. Due to its high safety and compact size. intrinsically safe equipment is widely used in fields require precise measurement.
Characteristics and applications of explosion-proof technology
Flameproof explosion-proof technology is a hard-core anti-explosion method. It uses a sturdy shell to withstand possible explosion pressure and prevent the flame from spreading outward. This technology is suitable for high-power and large-volume equipment. Such as motors and switch cabinets. In terms of application scenarios, flameproof equipment is mainly used in Zone 1 and Zone
Flameproof equipment is widely used in high-risk industries. such as petroleum and chemical industries. However, it should be noted that the shell of the flameproof equipment is relatively thick and heavy. It is not convenient for frequent maintenance. And professional tools are required for disassembly and assembly during maintenance.
Why Choose an Explosion Proof Pressure Transducer?
Safety: Explosion-proof pressure sensors can work stably in flammable and explosive environments. Prevent explosion accidents caused by electrical sparks.
Adaptability: They are suitable for a variety of harsh environments. such as oil well platforms, mines, oil tanks, etc. These places usually need to meet safety requirements.
Functional characteristics:
Explosion-proof pressure sensors usually have overpressure protection, current limiting protection, impact resistanc. These functional characteristics enable them to maintain good performance even in complex environments.
Explosion-proof pressure sensors are chosen because they can provide safety in dangerous environments. It has the ability to adapt to various harsh conditions.
What is the Difference between Burst Pressure and Proof Pressure?
Burst pressure refers to the maximum pressure value. that a container can withstand when it explodes. And pressure resistance usually refers to the maximum continuous pressure. A hose can safely withstand under normal use conditions, that is, the working pressure.
The working pressure is the upper limit of the recommended pressure for the long-term stable operation of the hose. The safety factor (usually 1/3~1/4 of the burst pressure) is combined in the design. It is necessary to avoid exceeding this pressure. Prevent fatigue damage or shortened life.
In general, it is crucial to choose the right explosion-proof pressure sensor. Safety issues cannot be ignored. Countless bloody lessons keep us alert.
Sino-Inst has been engaged in the pressure measurement industry for more than 20 years. We insist on making high standards and high-quality products. Our explosion-proof mark is Ex ia IIC T6 Ga.
Our product standard is Q/HK-8051-2016. Our explosion-proof pressure sensors comply with: GB3836.1-2010, GB3836.4-2010,GB3836.20-2010
Intrinsic safety parameters: Ui=28V, li=93mA, Pi=0.651W, Ci=24nF, Li=0.
Our products are sold to more than 20 countries around the world. There has been no negative reviews so far. Please choose us with confidence. We will provide you with the most suitable pressure measurement solution. If you need, please feel free to contact us!
