Payment & Shipping Terms:
|Machine Type:||Rectangular Aperture||Suitable For:||Package Goods, Food, Biscuits|
|Machine Structure:||Mirror Stainless Steel||Alarm Method:||Sound And Light Alarm|
|Reject Optional:||Push Rod||Application:||Food/textile/plastic|
|H.S CODE:||8543709100||Control System:||Digital Singal Process|
|Conveyor Belt:||FDA Grade||Weight:||Around 250KG If Customized The Weight Will Different|
|Customized Language:||English, Spanish And Russian||Package:||Plywood Case|
Rectangular Aperture small tunnel size high precision food grade metal detector / food metal detection
10-35 meters per minute adjustable
Light and sound and optional reject
How do metal detection systems work?
According to Quality Assurance & Food Safety Magazine, all general purpose nonferrous metal detectors work in the same way:
Three coils are wound exactly parallel on a non-metallic frame.
The center coil is connected to a high-frequency radio transmitter.
Two transmission-receiving coils sit on either side of the center coil.
Because the two outer coils are identical and the exact same distance from the center, they receive the same signal and produce an identical, balanced output voltage.
When a particle of metal passes through the system:
The high-frequency field is disturbed beneath one coil, changing the voltage and disrupting the balance.
The output fluxes from zero, producing a signal alerting the system to the presence of metal.
Depending on the specifics of the system, a rejection mechanism is generally activated, with the ideal result of removal of 100 percent of the metal and a minimum amount of salable product.
What is product effect and how does it relate to metal detection?
Product effect is an important factor in the selection of a metal detector. If your products are conductive (usually due to water, salt, or iron content), they will affect the electromagnetic field of the metal detector, causing it to produce a false reject. Dry or neutral products generally do not cause this effect.
If product effect is a factor, the correct frequency must be selected to move the product effect signal away from the signal of the contaminants. A metal detector that uses a single frequency cannot accommodate much signal variation thus making it unsuitable for inspecting a variety of product types or those that may vary in temperature. A three frequency, or better still, a multi-spectrum metal detector would be more suitable for these applications.
The most sophisticated metal detectors on the market today use multi-spectrum technology. Instead of relying on just one frequency, a spectrum of multiple frequencies work simultaneously to filter out product signals in a way that is much more effective than a single frequency. In addition, the number of false alarms is greatly reduced