CSA/ATEX certification for hazardous areas FAQ
Alicat devices are available with CSA/ATEX certifications for use in hazardous areas. This article covers the details of these certifications, including compatible device configurations.
Alicat’s CSA/ATEX classification
Alicat instruments can be built with the following dual CSA/ATEX classification:
Devices available with CSA/ATEX certification
CSA/ATEX certifications are available with the following device options:
- Compatible devices: All devices except EPC and EPCD pressure controllers, BASIS mass flow controllers, portable meters, and CODA Coriolis controllers and meters.
- IP rating: IP40 (Note: For an IP40 rated ATEX/CSA unit to meet official requirements, it must be placed in an IP54 rated box)
- Connectors: DB9, DB15, M12, industrial locking connector
- Communication protocols: Serial, analog, Modbus-RTU
CSA classes and divisions
A CSA certification has both a class and division. This classification is commonly used in North America.
- The class indicates the type of hazardous compound.
- The division indicates the likelihood of the hazard.
The Class I, Division 2, Group A, B, C and D, T4 classification indicates a device is safe for use with gases, vapors, and liquids in an environment where a hazard is likely. Specific operating conditions are further defined by the group (A, B, C, D) and temperature class (T4).
|1 – Gases, vapors, and liquids||1 – Hazard certain|
|2 – Dusts||2 – Hazard likely|
|3 – Fibers||3 – Hazard unlikely|
ATEX zones and equipment categories
An ATEX certification has a group and zone/category. This classification is used in most countries outside North America.
- As above, the class indicates the type of hazardous compound.
- Certifications are split into groups for either mining (Group I) or all other industrial applications (Group II).
- The zone represents the likelihood of a potentially explosive atmosphere occurring for gases, mists, and vapors (0, 1, or 2) and is associated with an equipment category (1, 2, or 3).
The Class 1, Zone 2 AEx ec IIC T4 Gc classification indicates a device is safe for use with gases, vapors, and liquids where a potentially explosive atmosphere is present infrequently and for short periods of time. Specific operating conditions are further defined by the group (IIC) and temperature class (T4).
|Zone||Equipment category||Likelihood of explosive environment occurring||Performance of protection|
|0||1||Present continuously||Two independent means of protection or safe even when two faults occur independently of each other.|
|1||2||Present intermittently||Suitable for normal operation and frequently occurring disturbances or equipment where faults are normally taken into account.|
|2||3||Present abnormally||Suitable for normal operation.|
*Visit the European Commission website for detailed information on ATEX certifications.