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Laser Barrier VLP21/VRH

Laser Barrier VLP21/VRH

Laser Barrier VLP21/VRH

Product catalog summary
Overview
The document provides technical specifications and operational details for the VLP21/VRH Laser Barrier, designed for harsh environments and extreme detection up to 1500 meters. It features a visible laser alignment pointer and an alarm signal for pre-failure conditions.

Applications
The laser barrier is typically used for slab and bloom detection at the exit of reheating furnaces. It emits a high-power infrared laser pulse, which is processed by the receiver to detect interruptions in the beam.

Special Features
  • High-power infrared laser pulse.
  • Insensitivity to ambient light and furnace radiation.
  • Pre-failure alarm output for dirty lenses.
  • Air purging and water-cooling for maintenance.
  • Modular construction for rapid maintenance.

Commissioning and Alignment
The laser alignment pointer simplifies installation. Two models are available: VLP21 with a red Class 2 pointer and VLP21-5 with a green Class 3R pointer, offering enhanced visibility.

Technical Characteristics
  • Maximum distance: 1500 m.
  • Detection margin varies with distance.
  • Maximum temperature: 1400 °C.
  • Emitter and receiver specifications include laser class, wavelength, and light spot diameter.
  • Alarm and LED indications for operational status.

Other Data
  • Operating voltage options: 220-240 V, 110-120 V, or 24 V.
  • Protection rating: IP 67.
  • Operating temperature: -20 to 70 °C without cooling, up to 120 °C with water cooling.

Dimensions and Accessories
Details on dimensions, connection, and available accessories such as heat shields are provided.
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Catalog excerpts

Laser Barrier VLP21/VRH-1

Through-Beam LASER BARRIER Visible Laser Alignment Pointer Alarm signal Designed for Harsh Environment

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Laser Barrier VLP21/VRH-2

Applications Typical Applications Slab - bloom detection at the exit of reheating furnace. The Emitter VLP21 unit emits a high-power infrared laser pulse. This pulse is received by a photosensitive diode fitted with an optical filter and whose signal is processed by the incorporated circuitry of the Receiver VRH. 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. Special Features...

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Laser Barrier VLP21/VRH-3

Technical characteristics

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Laser Barrier VLP21/VRH-4

Laser Class 1M Laser Class 2 Laser Class 3R Mounting with screw Ø 10 Laser pointer (for Emitters VLP21 and VLP21-5 only). Optical axis Laser pointer < 1 mW red (class 2) < 5 mW green (class 3R) Output S : Static (push-pull) R : Relay E.g.: VLP21-5/VRH-S 230VAC (with green laser pointer <5mW class 3R on emitter, static output on receiver, power supply 230VAC). 03/19– Printed in France 03/19 © DELTA SAS 2019 • Heat shield to protect from direct radiation, reference 7093146. Subject to change without prior notice

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.