The Magnastat system works by means of a permanent magnet and a ferro-magnetic temperature sensor. If the soldering tip is cold, the permanent magnet is attracted to the ferro-magnetic temperature sensor. In this state, the switch is closed and the heater is switched on. If the temperature sensor approaches its Curie low point, i.e. the selected peak temperature, its magnetic behavior changes and the heating is switched off. If the tip cools down slightly, the temperature sensor reattracts and the control circuit starts again. The working temperature is selected by simply changing the soldering tip with the temperature sensor attached to it. Weller Longlife solder tips cover 260°, 310°C, 370°C, 425°C and 480°C.This text is machine translated.