Fountain pump with auto shut off

[skywalker100]

Hi has anyone fitted a small fountain pump with out shut off when the water in the reservoir gets too low. I have found larger pumps with float switches but they are all a bit large.
Thanks

 

[hubsy]

I use float switches fitted into the side of the tank, high level and low level.(ebay)
floats switch relay which switches pump.

24v dc circuit.

high level= start
low level = stop

http://www.ebay.co.uk/itm/2x-Horizontal-Tank-water-level-sensor-liquid-float-switch-W-Rubber-ring-/271166622545?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item3f22ca4b51