Products

 

Industrial Conveyor Metal Detectors

Metal Detectors

Web-Tech AutoWeigh model "MDX-1" Metal Detectors provide a reliable, versatile and cost effective solution to the problem associated with tramp metal in a material stream. The system comprises a transmitter and dual detection coil assembly, sandwiched in a highly durable material. A microprocessor based electronics module combines with the coil assemblies to form a reliable and dependable system that performs where others fail.  Process trip and marker control outputs are standard.

Detection Method:
Designed for normal mining, quarrying and tertiary processing applications, the "MDX-1 Metal Detector" utilises dual channel pulsed eddy current technology. This unique approach for metal detection allows for a form of signature analysis to be performed on the tramp signal, thus  helping to prevent “phantom” trips. To provide the highest sensitivity and still retain stability, the Metal Detector uses a very low excitation frequency to the generator coil. This method of Metal detection avoids much of the induced "noise" from non-metallic variations of the product stream. As metal passes through the Metal Detector coils, the eddy current losses created by the tramp metal cause the Metal detector coil to be loaded. This dampens the oscillations of the transmitter signal. A simple voltage level detector is DC coupled to a low pass filter and amplifier, which process the minute variations in field strength. The gain of the filter amplifier block is adjustable, and a unique offset  control is provided to suppress the signal, relative to the programmed "trip" level. This allows high sensitivity to be used in the presence of normal process "noise" signals.

Precise selection of filter and coupling characteristics have provided the Web Tech MDX-1 Metal Detector with inherently high response to tramp  metal,  and  a corresponding high rejection of cyclic "noise".

 

Metal Detector Coils:
Metal Detector coil supports utilise the latest in durable Building materials, enabling it to withstand the harshest of environments, with Extra support to eliminate "Phantom Trips".

Metal Detector coils are fabricated to suit any conveyor width and conveyor profile


Metal Detector Marker Systems
The MDX Has an integrated Distance to tramp counter When the MDX-1 detects tramp metal it trips the conveyor. The counter on screen gives the operator a distance in meters from the coils to the position of the tramp metal along the conveyor.

The MDX-1 can also be supplied with optional burden marking systems including "flag" and "spray" types.

Splice Detector

As an option we can supply a proximity type splice detector which coupled in with the metal detector software will eliminate "Phantom Trips from belt splices.

 

Electronics Features

The "MDX-1" electronics is supplied in an IP66 reinforced fiberglass enclosure, and
incorporates integral keypad for all programming. All information is displayed on a backlit LCD display.

Programming is in simple "English" in a menu based system. Standard features include sensitivity and offset adjustment .Bar graph indication of metal sighs output. Diagnostic facility "coast counter for multiple trips and "real" Time history of detected trips.