Sender and receiver in one housing. A reflector is required. Different reflector sizes for different ranges and object sizes.

Laser:
Miniature reflex switches with laser:
WL100 L, WL130 L
Small reflex switches with laser:
WL190 L, WL9 L, WL12L-2
Cylindrical reflex switches with laser:
VL18 L

Glass detection:
Miniature reflex switches for glass detection:
WL100, WL11, WLG4-3, WL150
Small reflex switches for glass detection:
WL170, WL190 L, WL11, WL12G

AS-Interface:
Small reflex switches with AS-i:
WL12-2

Standard reflex switches for hazardous areas 2G:
WL24Exi
Small proximity switches for hazardous areas 3G / 3D:
WL18-3Ex
Standard proximity switches for hazardous areas 3G / 3D:
WL24-2Ex, WL27-3Ex