Diffuse Reflective Photoelectric Barrier

Scanning Hot Metal Detector
November 12, 2018
Honeywell Hour Meters OVERVIEW
November 12, 2018

Diffuse Reflective Photoelectric Barrier



The Optical Barriers have been designed with aluminium cast housing, optional air purge and water-cooling for use in harsh steel mill environments. Laser Barriers are used in applications where steam, dust or fumes are heavy, as in the case of a water spray chamber, a scarfing machine or a reheating furnace.High temperature reflectors are able to work in ambient temperatures up to 400 °C.

Operating principle

The VFT1 is a LED based Time-of-Flight detector. With this technology DELTA introduce an innovative solution for the detection of product in the difficult environment of the steel industry. It works on very dark low reflecting targets, as well as high temperature targets, and has an extended operating temperature range compare to laser technology.
Thanks to the Time-of-Flight technology the sensor is able to measure the position of the target, and can eliminate any background object.

Features and benefits

  • Detection range: from 0.8 m, up to 10 m on grey surface (18% remission), 8 m on black surface (6% remission)
  • Target temperature: up to 1250 °C (2280°F)
  • Detection resolution (distance between target and background): 150 mm (typical), 300 mm (for target temperature above 1000°C – 1830°F, or black surface over 6 m)
  • Response time: from 2 ms on white matt surface at 2 m to 14 ms on black surface (6% remission) at 8 m
  • 2 complementary static outputs for product presence and 1 output for alarm
  • Visible laser pointer (class 2)
  • Easy sensor setup with detection range selection and auto sensitivity adjustment
  • Water cooling (model VFT1- J B) & air purging
  • Optional heat shield for model VFT1 – JB