Hochiki IFD-E(EXD) - Manual (Page 5)

Hochiki Europe (UK) Ltd 5
2-3-0-810/ISS3/OCT11
Gas Group Representative Gas Other Gases, Liquids & Vapours
IIC Hydrogen Acetylene, Carbon Disulphide
IIB Ethylene Diethyl ether, Tetrafluroethylene
IIA Methane Butane, Methanol, Petroleum, Propane, Styrene
These Flame Detectors are approved IIC for listed gases in EN 50014.
Table 4 – Subdivisions of Group II Gases
Temperature
Class
Referred to
ambient of
-20°C to +40°C
Maximum Surface
Temperature
T6 85°C
T5 100°C
T4 135°C
T3 200°C
T2 300°C
T1 450°C
Detectors approved to T4 at 40°C
Table 3 – Temperature Classifications
Code
Type of
Protection
Code
Equipment
Category
ia Intrinsic safety 1
ib Intrinsic safety 2
d Flameproof 3
These Flame Detectors are approved ia.
Table 2 – Type of Protection Codes