AutomationDirect’s photoelectric sensor offering now includes 18mm rectangular plastic DC models. The IP67 rated sensors, available in 12 models, feature an 18mm diameter threaded lens and M12 quick-disconnect. The GX3 series is a diffuse photoelectric available with either NPN or PNP light-on outputs and features background suppression technology with fixed sensing distances of 100 mm or 150 mm.  GX3 series prices start at $49.
 
The GXP series is a polarized reflective photoelectric available with either PNP light-on output  or NPN or PNP dark-on output and feature fixed sensing distances of up to 20 meters.  GXP sensors include one round reflector. GXP series prices start at $39. 
 
The GXR/E series are through-beam photoelectric models available with either NPN or PNP light-on or dark-on outputs and offer fixed sensing distances of up to four meters.  GXR series receiver prices start at $35. GXE receiver-dependent emitters are available for $30.