- Diffuse with background suppression, where the sensitivity can be adjusted to prevent spurious detection where the background behind the object
- Diffuse, which detects the reflection of the beam from the object passing by.
- Polarised reflex, where the transmitted beam is horizontally polarised and the reflector rotates this by 90
- Thru-beam, where the object breaks the beam between a transmitter and receiver.
- Thru-beam, where the object breaks the beam between a transmitter and receiver. |