Three proximity sensor types compared
Proximity sensor detects objects without contact. Three types: inductive (metal), capacitive (metal + non-metal), optical (anything).
Comparison
| Parameter | Inductive | Capacitive | Optical |
|---|---|---|---|
| Detects | Metals | Everything | Non-transparent |
| Range | 1-40 mm | 1-30 mm | 0.1-30 m |
| Dirt tolerance | High | Medium | Low |
| Speed | 5 kHz | 500 Hz | 10 kHz |
FAQ
For conveyor?
Metal — inductive. Cardboard — optical. Bottles — capacitive.
Water level?
Capacitive through vessel wall.
Cheapest?
Inductive from $10.
Outdoors?
Inductive IP67 — yes. Capacitive — limited.
Max speed?
Optical — 10 kHz.
Summary
Catalog: proximity sensors.
