Level Sensors & Relays
A recent Simple Pump solar submersible well pump alternative application for a low replenishment rate well sent me on a search for a standalone all low voltage water level sensors and relays with timer solution. It took me hours of searching the Internet to find it because water level control manufacturers don't do much with low voltage.
The solution is two single sensor probes with the following specifications:
In a typical installation one probe would be suspended above your pump at a safe low water level point to prevent the pump from running dry. A second probe would be suspended above the first probe at an acceptable water recovery level point to restart the pump. The relay also has adjustable timers for either or both probes if needed to prevent short cycling of the pump.
The relay specifications:
Alternate supply voltages are available in AC for 24, 110, 240, 415VAC - 50/60Hz
Other options are available including a relay with an alarm output circuit.
These heavy industrial grade components are a matched set designed to provide high reliability. The probe warranty is 10 years. The components are UL listed.
This is not an inexpensive solution but it is less costly than the time, effort and expense of retrieving and rebuilding or replacing a pump or pump motor damaged from running dry.
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