Usually a colpit oscillator is used whereby a its coil can be of a loop of wire as metal is detected it will shift frequency as a result and the difference in frequency can be used to cause a display to an output.
An inductive sensor depends on ferro-magnetism, which is a characteristic of certain metals, such as iron.
photoelectric sensor-sense both metal & non-metal proximity sensor -sense metal only
A sensor is a general device that detects changes in the environment, such as temperature, light, motion, or pressure, and converts them into signals. A metal detector, on the other hand, is a specific type of sensor designed only to detect the presence of metal using electromagnetic fields. In short, all metal detectors are sensors, but not all sensors are metal detectors.
detector or metal detectors
on the intake hose. its the sensor close to the paded metal pipe
how sound sensor work
Check the speed sensor on the top of the tranny. This will tend to build up with metal shavings and cause the sensor not to read the speed of the transmission.
They can have problems related to corrosion because of the heat and the differences in metal between the exhaust system and the case metal on the sensor.
An abs sensor, can get metal shavings stuck to it, can brake clean, but normally if you have a fault it needs to be replaced.
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There is a metal substance added to the ink of each bill. The machine has a magnetic sensor that picks up the metal. the amount of metals added is different for each denomination. that's why photocopied bills never work!
A manner that is good