WIKA TR Serie Instructions Complémentaires page 5

1. Ex marking
For applications without transmitters (digital displays) that require group II instruments
(potentially explosive gas atmospheres), the following temperature class classification and
ambient temperature ranges apply:
Table 1
Marking
ATEX IECEx
II 1G Ex ia IIC T1, T2 T3,
T4, T5, T6 Ga
II 1/2G Ex ia IIC T1, T2, T3,
T4, T5, T6 Ga/Gb
II 2G Ex ia IIC T1, T2, T3,
T4, T5, T6 Gb
II 2G Ex ib IIC T1, T2, T3,
T4, T5, T6 Gb
For applications requiring instruments of equipment group II (potentially explosive dust
atmospheres), the following surface temperatures and ambient temperature ranges apply:
Table 2
Marking
ATEX IECEx
II 1D Ex ia IIIC T65 °C Da
II 1/2D Ex ia IIIC T65 °C Da/Db
II 2D Ex ia IIIC T65 °C Db
II 2D Ex ib IIIC T65 °C Db
II 1D Ex ia IIIC T95 °C Da
II 1/2D Ex ia IIIC T95 °C Da/Db
II 2D Ex ia IIIC T95 °C Db
II 2D Ex ib IIIC T95 °C Db
II 1D Ex ia IIIC T125 °C Da
II 1/2D Ex ia IIIC T125 °C Da/Db
II 2D Ex ia IIIC T125 °C Db
II 2D Ex ib IIIC T125 °C Db
When there is a built-in transmitter and/or a digital display, the special conditions from the
type examination certificate (see chapter 4 "Special conditions for safe use (X conditions)")
apply.
1) The values in brackets apply to special designs. These sensors are manufactured using special sealing compounds.
Moreover, they feature cases made of stainless steel and cable glands for low-temperature ranges.
WIKA additional information, models TRxx and TCxx (Ex i)
Temperature Ambient
class temperature
range (T
T1 ... T6 (-50)
Power P Ambient
i
temperature
range (T
750 mW (-50)
650 mW (-50)
550 mW (-50)
Max. surface temperature
(T
max
) thermowell tip
a
-40 ... +80 °C T (medium temperature) +
1)
M
self-heating
For this, the special
conditions must be observed
(see chapter 4 "Special
conditions for safe use
(X conditions)").
Max. surface temperature
(T
max
) thermowell tip
a
-40 ... +40 °C T (medium temperature) +
1)
M
self-heating
For this, the special
conditions must be observed
-40 ... +70 °C
1)
(see chapter 4 "Special
conditions for safe use
(X conditions)").
-40 ... +80 °C
1)
) at the sensor or
) at the sensor or
5
EN