Choosing the right pressure transmitter for an explosive area can be a complex task. Many parameters need to be considered, and the consequences of making a mistake can be devastating. By following these simple steps, you can ensure that you choose the right pressure transmitterfor your application, and guarantee the safety of your plant in a hazardous area.
When selecting an ATEX or IECEx transmitter, it is important to consider the specific industry group applicable to your installation. This will allow you to choose a transmitter that is suitable for the specific hazards present in your environment. By taking these cautions, you can help ensure your employees' and equipment's safety.
The pressure transmitters we offer are specifically designed to meet the needs of hazardous areas. We offer two different types, depending on the type of area you need them for: surface industry or mining.
According to the ATEX or IECEx directives, explosive atmospheres are classified as either Zone 0, 1 or 2. Zone 0 is classified as a permanent risk, while Zone 1 is classified as an occasional risk. Zone 2 is classified as a potential risk. For each zone, there are different types of pressure transmitters suitable for use in explosive atmospheres. For example, in zone 0, only explosion-proof or intrinsically safe pressure transmitters can be used. In Zone 1,dust-ignition-proof pressure transmitters can be used. And in zone 2, any type of pressure transmitter can be used.
When selecting a pressure transmitter for use in an explosive atmosphere, it is important to consider the transmitter's classification as well as the area in which it will be used. The wrong transmitter could cause a devastating explosion.
There are two main types of flammable substances: gas and dust. Gas is easier to detect as it is more visible, while dust can be more difficult to identify. Both types of flammable substances can be explosive, so it is important to choose a suitable pressure transmitter to work in explosive areas.
Select gas/dust transmitters according to the type(s) of chemicals that may be circulating in the area, as well as potentially volatile liquids such as some fuels.
There are two types of pressure transmitters with ATEX or IECEx certification:
To ensure safety, it's important to choose the right protection mode for your specific needs. This means choosing a precise device, such as sensors with different technologies depending on where they are to be installed: piezoresistive, capacitive.
One of the most important points to consider when selecting a pressure transmitter for an explosive area is the type of gas present as well as dust size and conductivity.
To avoid accidental ignition, you must choose a transmitter that is suitable for the type of gas you are using. The ignition risk of gases is classified into three categories: flammable, combustible and inert.
By choosing a pressure transmitter that is classified in the correct ignition risk class, you can help prevent accidental fires and explosions.
Depending on the application, the transmitter must be able to withstand different levels of dust exposure. For example, in a coal mine, the dust is relatively large and not very conductive. In a flour mill, however, the dust is smaller and more conductive. The type of pressure transmitter you choose should be able to adapt to the dust size and conductivity. If the transmitter is not designed to handle the dust, it may fail prematurely or even explode. You must therefore match the size and conductivity of the dust to the type of pressure transmitter you choose.
It is important to choose a sensor with an appropriate surface temperature range. This will ensure that the sensor can withstand the temperatures present in the explosive area.
The most common temperature ranges for explosive atmospheres are T1, low temperature, and T2, high temperature. If the sensor is not specified for the correct temperature range, it may not be able to provide accurate readings, or may even fail.
Choosing the right sensor with the appropriate surface temperature range is essential to ensure safe and accurate operation in an explosive environment.
In addition to the ATEX or IECEx designation, you should also check the protection rating of the pressure transmitter. This will give you an indication of how well the device is protected against the ingress of foreign objects and liquids, both of which can cause a fire or explosion. By choosing a pressure transmitter with the appropriate safety ratings, you can help guarantee a safe and productive working environment.
SAFETY
RELIABILITY
PERFORMANCE
When choosing an industrial pressure transmitter for an explosive area, it is important to consider the ATEX or IECEx marking.
ATEX certification is a fundamental provision of the European Directive on Explosive ATmospheres Directive 2014/34/EU. IECEx certification is the international certification system supported by the IEC International Electrotechnical Commision. The ATEX standards therefore apply to Europe, while IECex standards apply to the rest of the world. These coding rules provide valuable information for checking that the transmitter complies with the conditions of use.
A pressure transducer with the wrong ATEX or IECEx marking can endanger your plant and your staff. Select the right transmitter for your installation and your risks.
Bearing all these factors in mind, it will be easier to choose a pressure transmitter that can be used safely in an explosive area.
Fuji Electric's pressure transmitters products enable optimum control of equipment and processes, even in extreme environments: oil, gas, chemical and petrochemical industries.
