Micro switches and magnetic sensors are safety components: they detect when a guard (blade cover, lid, hopper) is opened and cut power to the motor, preventing the machine from running while open.

Micro switch: a mechanical contact triggered by a lever or button — available with 1, 2 or 3 contacts, universal or dedicated (e.g. for hopper, for thickness gauge, for mixer).

Magnetic sensor: detects position through a paired magnet, with no direct mechanical contact — more common on bone saws and electronic control units (e.g. Minerva, Bizerba) for blade guard protection.

Compatibility: parts available for Giovenzana, Valko, Minerva, Bizerba and Omas — always check the rated voltage/current (e.g. 16A 250V) and connector type (e.g. 6.3mm faston) before ordering.

For other electronic parts go back to Electronic Spare Parts.

Frequently asked questions

Why won't the machine start even though everything looks fine?
Often it's a micro switch or safety sensor not detecting the guard as properly closed: check that the blade cover/lid is correctly positioned before replacing the part.

What's the difference between a micro switch and a magnetic sensor?
The first is a mechanical contact triggered physically; the second detects a magnet at a distance, with no direct contact — they are not interchangeable.