17 Best Metal Detectors in 2020 Metal Detector Reviews ,Jul 10 2020 · Multifrequency MF detectors are typically machines that go for over 1000 and most commonly found in the highend Minelab detectors These are best if you’re serious about metal detecting and have the budget to back it up...As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.