Mounting Examples In Hazardous Areas; Possible Installation Methods With The Marking Ii 1G Ex Ia Iic T6 Ga Or; Ex Ia Iiic T65 °C Da - WIKA TR25 Mode D'emploi

6. Information on mounting and operation in hazardous areas

6.4 Mounting examples in hazardous areas

6.4.1 Possible installation methods with the marking II 1G Ex ia IIC T6 Ga or

II 1D Ex ia IIIC T65 °C Da
Zones 0, 1, 2 or zones 20, 21, 22
Thermowell
TWxx
Thermowell
TWxx
The probe together with case or connection head is located in zone 0 (zone 20). An Ex ia
type circuit must be used. Connection heads/cases made of aluminium are not permitted in
zone 0. For this location, WIKA uses connection heads/cases made of stainless steel.
WIKA operating instructions model TR25 (Ex i)
Process
connection
Compression
fitting
welded
Process
connection
Connection head/
Field case
Non-hazardous area
Hazardous area
Tx10-H
Tx10-A
Option:
with built-in
transmitter
e.g. T32
Tx10-H
Tx10-A
Tx10-C
Tx10-D
Tx10-A
Tx10-B
Tx10-C
Tx10-A
Associated
electrical equipment
Intrinsically
safe supply or
suitable barrier
Intrinsically
safe supply or
suitable barrier
Intrinsically
safe supply or
suitable barrier
Intrinsically
safe supply or
suitable barrier
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EN