Improved safety on board. Digital switch for all types of pumps up to 20 A - 12 V or 24 V. The electronics are built into a waterproof, corrosion-resistant housing. The switch reacts at a water level of 50 mm and switches off again at 20 mm. Accidental starting is avoided by a 5-second delayed start. The switch has 3 digital sensors, has no moving parts and is in accordance with ISO 8846. The housing is robust and constructed for maritime use on board. Dimensions: 9.8 x 5.4 x 2.6 cm.