Metal Detecting Device
MODEL MS 08/85/SQ, SQTA



Questionnaire For Metal Detector installed on Material Handling Conveyor

APPLICATION

The types SQ(standard unit) and SQTA(tandem unit) are metal detecting devices for protection and monitoring. These devices are designed with a specification that makes them suitable for a wide range of applications in areas where material have to be checked in view of metal pollution. Where ever metal pieces in the conveyed material may damage sensitive machinery, the metal detecting devices will prevent expensive repairs and production breakdowns.
The devices will not report ferric oxides like magnetite and hematite that are often inclusions in basalt, in builders' sand, and especially in slags. Thus the metal detecting devices types SQ and SQTA will help you to assure the quality of your Products and save costs.

Typical areas of Applications: - stone and earth industry - recycling industry - slags processing industry Both types, SQ and SQTA will detect all kinds of metal. In conjunction,with an Automatic Delayed Triggring Device (optional) and an ejector or or an alarm device (e. g. flap, lamp or something similar) you can fit a fully automated section of monitoring.

ADVANTAGES

  • probe and amplifier are designed in a solid and vibration resistant way
  • time saving simple mounting under the conveyor belt. There is no need to cut the belt.
  • adjustable sensitivity
  • The material of the probe is whether-proof
  • permissible ambient temperature max. 120 degree centigrade (optional>
  • front panel with all controls and a standard fitting panel meter for function check.
  • suitable constructed for maintainance
  • standard self-monitering and function control button


FUNCTION

A high frequency alternating voltage is fed from the amplifier to a coil in the probe via a 75 Ohms coaxial cable.
This generates an electromagnetic field. If a metal piece comes into this field, induction currents will be generated that will drain power from the oscillator. If depending on the selected sensitivity on unwanted metal piece in the conveyed material is identified by the electronics in the amplifier, the output relay will switch to its other state for about 0. 5 seconds.
The output relay has two nc/no-contacts that are wired to the terminal strip. These contacts can be used to stop the conveyor belt, or to activate an ejection device.
The standard self-control feature continually monitors important functions, like the high frequency generator the coaxial cable, and the tuning of the probe. In case of trouble a second relay will switch to its other stage, the nc/no-contacts of which are also connected to the terminal strip. The relay will remain in the other state as long as the trouble persists.


DESIGN

The Metal Detecting Device consists of two components, the probe and the amplifier, both of which are interconnected by one coaxial cable.
The probe will be furnished to match your conveyor belt width. There is a single probe and a tandem probe available. The planar single probe will usually be mounted underneath the conveyor belt. The tandem probe consists of two planar probes, one of which will be mounted underneath the conveyor belt, while the other probe will be held above the belt by special supports.
The tandem probe is distinguished by a sensitivity that is very uniform over the whole area in between the two planar probes. This probe type is therefore recommended for great charging heights, or if high sensitivity is required. The special supports will be furnished according to your belt charging height. The amplifier contains the electronic circuitry. The operating controls are on the front plate arranged for easy identification, and are accessible by opening a hinged door.
Actuating the function control button will simulate a metal piece in the conveyed material. This feature allows testing the whole chain of operation of the Metal Detector Device.
Electronic Metal Detectors