Automatic 12/24V electronic switch for bilge pumps

For any submersible pump operating at 20A max current draw and12/24V. It works in fresh and salt water. It switches on at a 50 - mm level and turns off at a 20 - mm level. A 5 - second return system prevents false starts. Oil - and hydrocarbon - resistant. RINA ISO 8846 type - approved.