All equipment used within hazardous areas has an operational temperature band or LIMIT. This is often REFERRED to as the “Tamb” and defines the upper and LOWER ambient temperatures of which the equipment is approved for use in. As defined in IEC 60079-0 the standard limits are – 20˚C to +40˚C. Where the OPERATION temperatures of the equipment FALL between these parameters no additional marking is required. However, if they are outside these parameters than the specific temperatures need to be identified.

All equipment used within hazardous areas has an operational temperature band or limit. This is often referred to as the “Tamb” and defines the upper and lower ambient temperatures of which the equipment is approved for use in. As defined in IEC 60079-0 the standard limits are – 20˚C to +40˚C. Where the operation temperatures of the equipment fall between these parameters no additional marking is required. However, if they are outside these parameters than the specific temperatures need to be identified.