The QS18LLP Polarized Retroreflective Laser Sensor. This sensor is excellent for applications where high sensing power and small beam size are important. The QS18LLP uses a special filter to polarize the emitted light, filtering out unwanted reflections from shiny objects.

Features of the QS18LLP include:

• Visible Class 1 laser
• Narrow effective beam provides small-object detection and precise
  position control
• Crosstalk rejection algorithm protects against optical disturbance from
  adjacent sensors
• Excellent optical performance throughout sensing range, even close up
• 10 to 30V dc operation, with complementary (SPDT) NPN or PNP
  outputs, depending on model
• Bright LED operating status indicators are visible from 360°
• Compact, rugged sealed housing, protected circuitry
• Mounting versatility – popular 18 mm threaded barrel or side-mount
• Choose 2 m (6.5') or 9 m (30') cable or one of four QD options