Photoelectronic Sensors

There are three main types of photoelectric sensors:

• A through-beam unit has a light source and a separate receiver. It looks for the beam between the two to be broken.
• A reflective unit has the receiver in the same unit as the light source and looks for the “bounce-back” of the light off an object.
• Retro-reflective units bounce a light source off a reflector and sense when this beam is broken.

Applications

• Sensing of tank or bin level.
• Confirmation of part or object passage.
• Detection presence or absence of object.
• Positioning of work piece.
• Measuring distance.

Features

• Non-contact.
• Works in harsh environments.
• Detects targets of almost any material.
• Color discrimination capabilities.
• Capable of long detecting distances.
• Can have high accuracy detection.