Operating Instructions
11
4.4 Use in Ex Hazardous Areas
Marking DustEx:
II 1/2D Ex ia/tb IIIC Tx* °C Da/Db
*-electronics / enclosure
Zone 20: -20 °C _< T
process
_< 250 °C
Zone 21: -20 °C _< T
amb
_< 60 °C
- Equipment group: 2
- Equipment category: 1/2 Electrode zone 20 / enclosure zone 21
- For explosive mixtures of air and combustible dusts
- IP-code 68
- Permitted process temperature -20 to 250 °C
- Up to process temperatures of 120 °C, the maximum surface temperature of the electronic enclosure
is 120 °C. In case of higher process temperatures. At higher process temperatures the allowable surface
temperature is determined by the process temperature.
Marking GasEx:
II 1/2G Ex ia/d IIC T4* Ga/Gb
*-electronics / enclosure
Zone 0: -20 °C _< T
process
_< 250 °C
Zone 1: -20 °C _< T
amb
_< 60 °C
The sensor is not allowed to be used in areas of class IIC, in case of expected, intense charging processes.
- Equipment group: 2
- Equipment category: 1/2 Electrode zone 0 / enclosure zone 1
- For explosive mixtures of air and combustible dusts
- IP-code 68
- Permitted process temperature -20 to 250 °C
- Up to process temperatures of 130 °C, the sensor corresponds to temperature class T4.
At process temperatures up to 195 °C, the sensor corresponds to temperature class T3 and at process
temperatures up to 250 °C, the sensor corresponds to temperature class T2.
Hazardous Area
DustEx-Zone 20
GasEx-Zone 0
DustEx-Zone 21
GasEx-Zone 1
Non-hazardous Area
Tmax = 60 °C
Tmax =
250 °C
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