Temperature classes (cenelec/iec/nec 505)

Field Instrumentation Temperature Measurement
1

TEMPERATURE CLASSES (CENELEC/IEC/NEC 505)

2

Examples

Temperature Class T1 - Propane ,Lightning Gas, Hydrogend (Ignition temperature is greater 450 Deg C)

Temperature Class T2 - Ethyl Alcohol, Ethylene , Acetylene (Ignition temperature is between 300 and 450 )

Temperature Class T3 - Fuel (Ignition temperature is between 200 and 300 )

Temperature Class T4 - Acetaldehyde ,Ethyl ether (Ignition temperature is between 135 and 200 )

Temperature Class T5 (Ignition temperature is between 100 and 135)

Temperature Class T6 Carbon Di sulfide (Ignition temperature is between 85 and 100 )