Features

• Intense, highly directive, visible red laser diode beam.
• Insensitivity to ambient light.
• Adjustable sensitivity.
• A jack socket (under the protective cover at the rear of the receiver) providing an output of signal strength as an aid during alignment.
• A LED indicator showing operation of the receiver.
• Air purging.
• Optional water-cooling jackets for use at ambient temperatures higher than 50 °C (flow-rate 2 I/min).
• Optional alarm output (VL/VR1G) for indication of the lenses becoming dirty (signal at the limit of the adjusted threshold).
• Modular construction allowing rapid maintenance.
• Optional features allowing configuration for any application.
  

Typical applications

The VL/VRG optical barrier resolves all detection problems that may arise in the most diverse types of industry, for example heavy industry (steel), handling and transport, etc. It is particularly recommended for the following applications:

Principle

The emitter VL unit emits a high intensity, visible beam of modulated red laser light. This beam is received by a photosensitive diode fitted with an optical filter and whose signal is processed by the incorporated circuitry of the receiver VRG. The output changes state depending on whether the modulated beam is interrupted or not. The modulation of the emission, the particular characteristics of the optical filter and the automatic correction for ambient light make the sensor insensitive to any other source.