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EN
14073045.06 10/2020 EN/DE/FR/ES
WIKA operating instructions model TR25 (Ex i)
23
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
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.
Zones 0, 1, 2 or zones 20, 21, 22
Hazardous area
Non-hazardous area
Thermowell
Thermowell
welded
TWxx
TWxx
Process
connection
Connection head/
Field case
Tx10-B
Tx10-C
Tx10-C
Tx10-D
Tx10-H
Tx10-H
Option:
with built-in
transmitter
e.g. T32
Tx10-A
Process
connection
Compression
fitting
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
Tx10-A
Tx10-A
Tx10-A
6. Information on mounting and operation in hazardous areas
Summary of Contents for TR25 (Ex i)
Page 36: ...EN 14073045 06 10 2020 EN DE FR ES WIKA operating instructions model TR25 Ex i 36 ...
Page 66: ...DE WIKA Betriebsanleitung Typ TR25 Ex i 66 14073045 06 10 2020 EN DE FR ES ...
Page 96: ...FR 14073045 06 10 2020 EN DE FR ES WIKA mode d emploi type TR25 Ex i 96 ...
Page 126: ...14073045 06 10 2020 EN DE FR ES WIKA operating instructions model TR25 Ex i 126 ...
Page 127: ...14073045 06 10 2020 EN DE FR ES WIKA operating instructions model TR25 Ex i 127 ...