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1) Sensor

An electronic device designed to detect a specific phenomenon, such as the presence or absence of a physical object, and used to affect control over a designated process.

2) Shielded

An inductive proximity sensor configuration that allows for the sensor to be embedded in metal.  Shielded sensors contain a metal band that surrounds the ferrite core and allows the electromagnetic field to be concentrated to the front of the sensor face.

3) Convergent beam

Another name for fixed focus sensing where the photoelectric sensor will only detect objects at a fixed distance from the sensor.

4) Hysteresis

The ratio of the distance the object travels between the points at which the sensor is turned on and off to the distance the object is from the sensor.

5) Sizing

The use of sensor arrays to detect the size of an object.  The number of sensors in continuous array that detect the object are a surrogate for object size.

6) Photoelectric

A form of sensor that uses light to detect the presence or absence of a physical object.  See also Sensor .

7) Masked out

The design of an inductive loop sensor so that certain objects are not detected.

8) Skew angle

The angle at which photoelectric sensors are sometimes mounted in retro-reflective applications so as to prevent the reflection of the object itself from triggering the sensor.

9) Active face

The surface of an inductive proximity sensor where a high frequency electromagnetic field emerges, although there is no direct magnetic field occurring.

10) Echo

The time elapsed between pulse emission and reception that is used to determine target position in an ultrasonic proximity sensor.

11) First surface protection

The ability of polarized retro-reflective photoelectric sensors to eliminate false operation as a result of shiny objects.

12) Package detection

The use of sensors to identify the presence of an object typically to actuate another device for the process of identification, sorting, sizing, etc.

13) Quality control

The use of sensors to detect the presence of an object's component part, fill level, or dimensional tolerance for the purposes of providing process quality control.

14) Target correction factor

Aspects of the target object such as sensing face size and shape that determine the actual sensing distance with respect to inductive proximity sensors.

15) Unshielded

An inductive proximity sensor configuration that requires a metal-free zone around the sensing face.