Answer:

It depends on the output signal of the sensor and values on the Exi certificate:

Example with our certificate ISSeP07ATEX012X:

1. Non-amplified output (Wheatstone bridge – mV/V): Options I4 or I6

Our certificate ISSeP07ATEX012X specifies that:

1. The capacitance of the cable may not exceed 14 nF
2. The inductance of the cable may not exceed 10 µH

 The capacitance of our standard cable (4 wires) is 130 pF / m, its inductance 0.7 µH / m. The maximum length is in this case 14 m because we then reach the maximum inductance.

       2. Current output (4…20 mA – 2 wires) : Option C6

In this case, the same certificate specifies that:

1. The capacitance of the cable may not exceed 53 nF
2. The inductance of the cable may not exceed 150 µH

 The capacitance of our standard cable (2 wires) is 150 pF / m, its inductance 0.65 µH /m. The maximum length is in this case 230 m because we then reach the maximum inductance