Capacitive

Capacitive proximity sensors are triggered by a change int eh surrounding dielectric. The transducer of a capacitive sensor is configured to act as the plate of a capacitor the dielectric property of any object rpesent in the sensing field increases the capacitance of the transducer circuit and, in turn, changes the frequency of an oscillator circuit. A detector circuit senses this change in frequency,a nd signals the output to change state.

Encoder

Inductive/Magnetic

Sensors with an oscillator and coil that radiate an electromagnetic field that induces eddy currents on the surface of metallic objects approaching the sensor face. the eddy currents dampen the oscillator energy. This energy loss is sensed as a voltage drop, which causes a change int eh sensor's output state. Often called simply a "proximity sensor".

Photo Electric

Electronic device recognizing changes in light intensity and converting these changes into a change in the output state.

Roller Conveyor Sensors

Specialty

Color Senors, Contract Sensors, Distance Sensors, Fork Sensors, Luminescence Sensors, Light Grids, Data Transmission Sensors.

Ultrasonic

Ultrasonic signals are like audible sound waves, except the frequencies are much higher. Ultrasonic transducers have piezoelectric crystals which resonate to a desired frequency and convert electric energy into acoustic energy and vice versa.