Working principle of food metal detector

Food metal detector is an instrument specially used to detect metals, which can improve food safety and reduce hidden food safety hazards caused by unfavorable detection. Food metal detectors are specially used for meat, fungi, biscuits, Confectionery, chocolate, bread, instant noodles, beverages, grains, fruits and vegetables, dairy products, aquatic products, seafood, health products, additives and condiments, etc., can accurately detect ferrous and non-ferrous metal impurities in food in a timely manner. It has brought great protection to the food safety of consumers. How does the food metal detector work, and how does it detect related foreign objects, I will introduce you in detail below.

The food metal detector uses the principle of electromagnetic induction to detect metals. All metals including iron and non-ferrous have high detection sensitivity. The entry of ferromagnetic metals into the detection area will affect the distribution of magnetic lines of force in the detection area, which in turn affects the magnetic flux in a fixed range. Non-ferromagnetic metals entering the detection area will produce eddy current effects, and will also change the magnetic field distribution in the detection area. Cause the detector to beep. The accuracy and reliability of the detector depend on the frequency stability of the electromagnetic transmitter, and the operating frequency from 80 to 800 kHz is generally used.

The lower the working frequency, the better the detection performance of iron; the higher the working frequency, the better the detection performance of high carbon steel. The sensitivity of the detector decreases with the increase of the detection range, and the size of the inductive signal depends on the size of the metal particles and the conductivity.

Food metal detectors can be designed and customized according to the needs of different companies to suit their own equipment, which can not only meet the testing needs, but also reduce unnecessary waste caused by inappropriate choices. When purchasing a food metal detector, It is recommended to choose a regular manufacturer to purchase. On the one hand, the manufacturer can provide professional corresponding model products according to the demand, and also have a good after-sales service guarantee.