Initially conceived and now successfully applied to protect 1000’s of underground high voltage sub-stations the high visibility float will automatically rise with incoming floodwater and then latch at the highest recorded level. The operator is immediately informed of the risk to switching gear and other plant, avoiding a repeat of past accidents where plant has been damaged by operating it whilst contaminated and in worse cases operators have been electrocuted.

An optional electronic sensor module (ESM) may be fitted at any height on the water level indicator. The float has an embedded magnet and in a flood condition will activate a reed switch in the ESM Providing a contact closure which can be used to trigger local or remote alarms. Many unmanned locations now have telemetry monitoring of the plant and can be used to send an alarm message to central offices.

Resetting the float is simple—the entire inner rod assembly is simply withdrawn from the outer tube which remains in place. The purpose designed float has two sprung loaded reset levers. which allow it to be slid down to the low level. The rod assembly is then re-inserted and top and bottom locations ensure it is positioned correctly.