BW Electrode
LH Low Water
Cut-off Controls

DEAN BENNETT SUPPLY
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BW-LH "Low Water Cut Off" Sensor Controls

Download BW LH low water controls in pdf
BW low water cut off control for sensing when water level has dropped to a dangerous level.
 BW Electrode System for Protecting a pump in a water well from running dry.

The "LH" series BW Electrode Control will protect your pump in the well from running out of water and burning up. BW "LH" controls are available for 230 Volt and 115 Volt pump installations. Please specify the voltage of your pump.

The electrodes are hung in the well at different heights to control turning off and resetting the control.

The BW control uses 3 electrodes to protect your pump when water drops to a dangerous level. The first electrode is the ground to liquid electrode. It will be hung in the well below the other 2 electrodes. This assures a proper grounding of the sensor control and proper performance. A ground to a ground stake is not adequate to make your system work right.

The next electrode is above the ground electrode and provides the power cut-off when the water level drops below it.

The upper electrode is set at a level that allows your well to recover to an adaquate level before allowing the pump to restart. This protects against rapid cycling on and off. Your pump will not run after cut-off until water covers both the low water cut off and the upper reset electrodes.
     $ 264.00 BW-LH Control Low water cut-off control with Nema 1 enclosure.
Specify voltage ( either 115 V or 230 V )

   $   35.50
         each
Stainless Steel
Electrodes
Three stainless steel electrodes are required
Price is for each electrode
 
   $ .27 ft.
Electrode Wire
18 gauge stranded copper wire with PVC insulation   available in Black, Red, and Green
   $ .17 ft Electrode Wire 
Full Rolls		 500' Full Rolls of Electrode Suspension Wire 18 gauge stranded copper wire with PVC insulation.


Installation Instructions for the "LH" BW Control

The 1500C sensor control will protect your pump from running dry when the water level drops to a dangerous level in the well.

Proper wiring of this unit is important to allow it to perform properly. The unit is wired between your power source and your pump control box.

The wire from your power source will have 2 wires that are hot with electricity. These will be referred to as L-1 and L-2.
L-1 will connect to the BW terminal #3
L-2 will connect to the BW terminal #4
From the BW #3, install a jumper wire to BW #5
From the BW #4, go into the pump control box to L-2 input
From the BW #6, go into the pump control box to L-1 input

Now it is time to set up your stainless steel electrodes for in the well.
There are 3 electrodes used in the proper installation. It is recommended that you leave the wire above each electrode hanging free in the well, at least 6" to 12" to prevent deposits from forming on the electrode that could cause false readings to the sensor control. It is also recommended that you place a bit of silicone gel on the top of the electrode cover where the wire goes in, to prevent water from getting into the top of the cap and being held there when the water drains from the bottom of the electrode. This will prevent false readings caused by water in the cap.

You may choose to lay out the wires for your electrodes on the ground to get them ready to install in the well. This way, you can measure the distance you desire between the electrodes, and tape the wires together so they hang as a unit. Remember to leave the ends near the electrode free, so it can move with the water.

BW sensor #7 is jumper wired to BW sensor #9.
BW sensor #9 then goes to the upper level electrode in the well. This electrode is the one which resets the control to allow your pump operation after the power has cut off due to low water level in the well.

BW sensor #8 goes to your low level cut off electrode. When the water level drops to the level where this electrode is out of the water, the power to the pump will be shut off.

BW sensor #10 goes to a liquid ground. This should be hung in the well somewhere below the lower level cut off electrode. NOTE connecting this terminal to a ground stake will not provide a proper ground, and may make the control malfunction. Ground must be to liquid.

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Prices effective January 19, 2010