Level detectors for the Ex control of submersible pumps

Generally submersible pumps in Zone 1 are protected by standardised or special protection for category 2.

If specified for Zone 0, as a second independent means of protection the pump is additionally equipped with a level sensor to ensure a continuous submersion during operation.

An independent safety device with a SIL 2 and a hardware fault tolerance of 1 (redundant safety device) is necessary to fulfil the requirements of Category 1 equipment.

All ignition risks have to be considered.

See more EN 50495.

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