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Sensors
Proximity
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- Proximity sensors are used for noncontact target detection at closer ranges than photoelectric sensors. They produce an electromagnetic field that causes a change in output as a target passes into the sensor's range.
- Capacitive
- These sensors detect not only metal, but also most nonmetallic targets such as liquids, plastics, wood, glass, and powders. They're good for level-control appliacations.
- Inductive
- High-frequency magnetic fields emerge from the detecting coil at the front-end of the sensor. When a metal target enters into the field, an induced current circulates the target. The energy absorbed will diminish the magnetic flux oscillation. The resulting change in current will cause the trigger circuit to change state and actuate the output stage circuit.
- Ultrasonic
 Allen-Bradley - Capacitive, Inductive
Aromat - Inductive
Balluff - Capacitive, Inductive
Baumer Electric - Capacitive, Inductive, Ultrasonic
Cherry - Magnetic
Contrinex - Capacitive, Inductive
IFM electronics - Capacitive, Inductive
Lundahl Instruments INC - Ultrasonic
Magnetic Moments - Eddy Current
Migatron Corporation - Ultrasonic
Omron - Capacitive, Inductive
SIE - Capacitive
SUNX - Inductive
Sciensoria - Inductive
Senix Corporation - Ultrasonic
Sentex - Inductive
Siemens - Capacitive, Inductive, Ultrasonic
Smith Systems, Inc. - Inductive
Square D - Capacitive, Inductive
Stedham Electronics Corp. - Capacitive
Turck - Capacitive, Inductive, Ultrasonic
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