Minimelder/ Maximelder with Visual/ Audible Alarm is designed to signal minimum or maximum levels of water, heating oil EL, L, M, oil/ water mixtures and neutral, non-viscous and non-adhesive liquids in tanks. The Minimelder/ Maximelder consists of a control unit and a height-adjustable float probe. The Minimelder/ Maximelder requires AC 230 Voltage for operation and can operate in temperature range of -5/+50 degree C and -5/+55 degree C. Minimelder/ Maximelder with Visual/ Audible Alarm is available in application specific design and in accurate dimension.