Normative Requirements for Special Applications

Capacitive sensors can be designed to meet the prerequisites for use in special areas.

Explicitly increased safety requirements may apply due to certain safety risks typical of the plant—for example, the framework can be set out by European law. This is the case with Directive 2014/34/EU. Safety requirements may also be based on specific requirements of individual countries, such as China Compulsory Certification (CCC), the Canadian Standards Association (CSA) in Canada, and Underwriters Laboratories Inc. (UL) in the USA. In order for products to be used in certain environments, they must be approved for those areas of application. Capacitive sensors may have approvals for CCC, CSA, or UL.

Hazardous Areas

Capacitive sensors may be used in explosion hazardous areas if they have ATEX or IECEx approval of the following type:

• Equipment protection level Ga ... Gc: sensors for gas hazardous areas, Zone 0 … 2,
• Equipment protection level Da ... Dc: sensors for dust hazardous areas, Zone 20 … 22, or
• Equipment protection level Ma or Mb for use in mining (Group I according to 2014/34/EU)

The components must be marked accordingly.