Hall Effect Probe
Magnetic fields produced by permanent magnets and electromagnets can be measured with the help of Hall Effect probe. In the presence of magnetic fields the device will generate an output voltage in the range- 4 to 4volts for field densities -70 to 70mT.Whole assembly is fitted inside a plastic moulded case. A 9 Volt battery is used to operate it. Polarity will get reverse the direction on reversing the direction of sensor