Proximity Sensor Technical Information
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Basics of...Choosing the Right Type of Proximity Sensor
Capacitive Sensor
- Detects any material
- Affected by environment: humidity, dust, etc.
- Best for: bulk materials, liquids, and targets behind a separation wall
Inductive Sensor
- Identifies only metal targets
- Predictable sensing technology (few variables)
- Reliable industrial technology
Output Signal
For the DC version, there are two types of sensors:
- Basic sensor - PNP model, switching the positive side to the load (sourcing) & NPN model, switching the negative side to the load (sinking)
- Programmable, universal sensors
A single sensor, depending on the wiring connections, can perform any of the following 4 functions: PNP/NO, PNP/NC, NPN/NO, N/NC.
NOTE: The output can only be wired to a single load.
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