Question 1

What is an explosion-proof pressure Sensor?

Accepted Answer

Explosion Proof Pressure Sensor refers to a type of pressure sensor that can be used in dangerous scenarios. Such as flammable and explosive scenes.

The technical principle of Explosion Proof (flameproof) Pressure Sensor allows dangerous gas to enter the flameproof enclosure, and explosion may occur in the enclosure.

But the shell must have sufficient strength. And each joint surface of the housing must have a sufficiently long engagement length and a sufficiently small gap. To ensure that the internal explosion will not pass through the flameproof joint surface and cause the external environment to explode.

Explosion Proof Pressure Sensor has a thick flameproof enclosure of the pressure transmitter, which is designed to withstand the explosion pressure of the internal explosive gas mixture exceeding 2MPa. Prevent the internal explosion from propagating to the external surrounding explosive mixture, thereby achieving explosion-proof performance.

Question 2

What is intrinsically safe pressure sensor?

Accepted Answer

Intrinsically safe pressure sensors, the explosion-proof mark is Ex dII C T4 Ga. Intrinsically safe pressure sensors equipment protection level and the relationship between hazardous locations and protection levels: equipment protection level (EPL)-Ga, hazardous locations-explosive gas atmosphere zone 0 , Protection level - very high.

The principle of Intrinsically safe pressure sensors explosion-proof technology, electric sparks and thermal effects are the main ignition sources that cause explosive dangerous gas explosions. Intrinsically safe is achieved by limiting the energy of the two possible ignition sources of electric sparks and thermal effects.

There are low ignition points for various explosive dangerous gases. When the energy of electric spark or thermal effect that may be generated under normal working and fault conditions is low, it will not ignite the corresponding explosive dangerous gases and cause an explosion.

The design of Intrinsically safe pressure sensors starts with limiting energy, and reliably limits the voltage and current in the circuit within an allowable range. In order to ensure that the pressure transmitter works normally or in the event of a fault such as short circuit or component damage. Will The spark or heat effect energy that may be generated by the connecting wires inside the equipment and exposed to potentially explosive atmospheres is limited to a level that cannot cause ignition. It does not cause explosions of dangerous gases that may exist around the pressure transmitter installation.

Explosive hazardous environments will inevitably form in the well-known production fields such as petroleum, chemical industry, and coal:
Under coal mines, about two-thirds of the area belongs to explosive hazardous areas;
About 60% to 80% of the areas in oil mining mines and refineries are explosive hazardous areas;
In the chemical industry, more than 80% of the production links belong to explosive hazardous places;
In recent years, explosion accidents of combustible dust such as metal processing, paint and food processing have occurred frequently, which has attracted people's attention.

Question 3

What is a Sanitary Pressure Transmitter?

Accepted Answer

Sanitary pressure sensor, also known as Hygienic Pressure Transmitter. It is to ensure the hygiene and safety of food and medicine. Ensure that food and pharmaceuticals cannot come into contact with and mix with toxic, harmful, polluting substance components or substances that are not suitable for mixing through the contacting pressure transmitter. The materials, structure, performance, processing (such as welding, polishing, etc.), and cleaning treatment of pressure transmitters that are in direct contact with food and drugs have a series of hygienic requirements. Meeting these special requirements is the hygienic pressure transmitter / hygienic pressure sensor.

Hygienic pressure transmitters meet the following series of hygienic requirements. In terms of non-toxic and harmless requirements for materials. Including: selection of different grades of stainless steel materials (304L, 316L, 410, 409, 329) according to different conditions.

In terms of structure, the surface is required to be smooth and clean, without dead ends, not easy to accumulate dirt residues, not easy to pollute, easy to wash (quick-opening clamp interface is often used) and easy to sterilize and disinfect. In terms of anti-contamination and anti-pollution, strict sealing and isolation are required to prevent the entry and leakage of poisonous, harmful and pollutants, and high-temperature disinfection and sterilization.

Processing requires a certain degree of finish and weldability.

Maintenance requires suitable cleaning agents, easy cleaning of internal and external surfaces, convenient cleaning in place (CIP) and sterilization in place (SIP), etc.

Sanitary pressure transmitters are used in food and drug production equipment to directly contact food and drug raw materials and semi-finished products to measure pressure or liquid level. It is made of high-quality stainless steel and has an overall welded structure.

And meet strict sealing isolation performance and have the performance and conditions to withstand strict and sufficient high temperature sterilization or chemical sterilization. It is not easy to produce dead angles for sterilization and disinfection during installation and use. Meet the requirements of sterility and avoid contamination to ensure the safety of food and drug production.

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