WIKA TR Serie Instructions Complémentaires page 14

3. Commissioning, operation
3.5.3 Possible installation methods with the marking II 2G Ex ia IIC T1 ... T6 Gb or
II 2D Ex ia IIIC T65 ... T125 °C Db
EN
Zones 1, 2 or zones 21, 22
Thermowell
TWxx
Thermowell
TWxx
3.5.4 Partition walls for separation between zone 0 and the less hazardous zone or
separation between hazardous and non-hazardous area
The wall thickness of the partition wall should be at least 1 mm (stainless steel).
If the wall thickness is < 1 mm, please note the following:
In case a mineral-insulated sheathed cable is a partition wall, the minimum wall thickness
is 10 % of the outer diameter of the mineral-insulated sheathed cable. If a transition sleeve
between flexible cable and mineral-insulated sheathed cable is part of the partition wall,
the minimum wall thickness of the transition sleeve is 0.4 mm.
The operator must not create an ambient condition that negatively affects the minimum wall
thickness of the partition wall. This is particularly the case for the models TR10-D, TC10-D,
TR10-H, TC10-H, TR40, TC40, TR41, TR50, TC50, TR53 and TC53.
14
Process
connection
Compression
fitting
welded
Process
connection
Connection head/
Field case
WIKA additional information, models TRxx and TCxx (Ex i)
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
Non-hazardous area
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