Hadro has specialised in Float Level Switches and Level Gauges for industrial and marine applications since 1993.

Hadro Techniek was founded in 1993 in Breukelen, the Netherlands. Following a period of steady growth, they moved to larger premises in Gouda in 2001, where they are currently focused on the production of magnetic level gauges, level indicators and float switches.

Hadro specialises in custom-made items. The industrial and nautical sectors are given special attention. For the marine industry, they have the LRS and BV certifications. All of Hadro's switches and instruments are made in their own workshop. Hadro can provide personalised service and handcraft each float switch or level unit.