Electric probe-equipped pumps remove the need for an automated control panel to switch off the unit during unattended dewatering. When the probe comes into contact with water or other conductive media, a signal is sent to a timer. If the contact lasts for more than one second, a continuous low voltage electric circuit is formed between the probe and the pump body, acting as the ground, prompting the relay to switch on the pump. Once the fluid level has receded below the level of the probe, the pump will continue to operate for 1 minute before shutting off. This reduces the chance of short cycling due to turbulence in the water.
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