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Photo
Application
Working Principal
Special Features
Technical Specifications

 Delta USAVL/VRG
Laser Optical Barrier
With Separate Transmitter and Receiver
Detection of Hot and Cold Product
  

 
Application   
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. It is particularly recommended for the following applications:
   

LONG RANGE HARSH ENVIRONMENT DIRECTIVITY
vl-vrg-app1.gif (1336 bytes) vl-vrg-app2.gif (1204 bytes) vl-vrg-app3.gif (2021 bytes)
   




Working Principle       Up
The optical barrier VL/VRG is made up of two self-contained units:
  • The emitter VL consists of a red laser diode, with optics incorporated, which emits a beam of modulated light towards the receiver.
  • The receiver VRG consists of a lens, an optical filter, a photodiode receiver and amplifier circuitry to process the photodiode signal.

The output changes state depending on whether the modulated beam is interrupted or not.  Modulating the emission and automatic correction for ambient light in the amplifier circuitry renders the sensor insensitive to ambient light.

Special Features       Up

  • Intense, highly directive, visible red laser diode emission
  • Insensitivity to ambient light
  • A jack socket (located 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
  • Optional water-cooling jackets for use at ambient temperatures greater than 70°C (flow-rate 2 I/min)
  • Modular construction allowing rapid maintenance
  • Optional features allowing custom configuration for any application


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