The temperature monitors are installed in aluminium screw-in housing M4 x 5 mm and are sealed in epoxy resin on the connection side. The annex switches produced in this way are to screw into cooling units, carbon brush holders, transformer plates etc. The switches have a diameter of 10 mm and a height of 13 mm (type L01/02) or 13.5 mm (L06/08). The screw-in housing has an M4 thread with a length of 5 mm and a width across flat of 10 mm.