If you tape the shims to either side of the pipe, they will provide a flat surface for the magnets to rest on. It works very well if you have two "shims" which are the same thickness as the diameter of the water pipe. The two magnets in this arrangement create the strongest possible magnetic field between them. Water conditioning works best if you use two magnets, one on each side of the pipe in attracting arrangement. They will work well on any water line up to 1.5" in diameter. For this application, we often recommend our BY0Y08 blocks. Larger magnets will provide a stronger and more consistent magnetic field between them. Magnets on the main water line should be of dimensions 1.5 - 2.5 times the outside diameter of the pipe coming in. I see you supply plastic and rubber coated magnets. Gold plated magnets have the same characteristics as nickel plated ones, but with a gold finish. Gold plating is applied over the top of standard nickel plating. From our experience, it is the least durable of the available coatings. Zinc can leave a black residue on hands and other items.Įpoxy is basically a plastic coating that is more corrosion resistant as long as the coating is intact. Zinc has a dull gray/bluish finish, that is more susceptible to corrosion than nickel. It is also still shiny, much like plain nickel plated magnets. NOTE: It does not appear completely black like epoxy coatings. A black dye is added to the final nickel plating process of the triple plating of nickel-copper-black nickel. It is not waterproof.īlack nickel has a shiny appearance in a charcoal or gunmetal color. It has a shiny silver finish and has good resistance to corrosion in many applications. It is actually a triple plating of nickel-copper-nickel. Nickel is the most common choice for plating neodymium magnets. More detailed specifications can be found on our Specs page. The preferred coating is dictated by preference or intended application. Will neodymium magnets lose strength if they are held in repelling or attracting positions for a long time?Ĭhoosing different coatings does not affect the magnetic strength or performance of the magnet, except for our Plastic and Rubber Coated Magnets. In either case, you can find values for each of these properties on the product pages for each of our magnets. This number depends on the magnet material, the shape of the magnet and how it’s used in a magnetic circuit. It’s the field strength you might measure if you could squish a magnetometer’s sensor right up against the surface. The Surface Field is the strength of the magnetic field measured right at the surface of the magnet. See our Specs page for more Br values for various neodymium magnet grades. Grade N42 magnets have a Br of 13,200 Gauss, while N52 magnets can be as high as 14,800 Gauss. This number is a material property which is independent of the magnet shape. Scroll down to the last section of this article for a more detailed explanation. Residual Flux Density, Br, is the magnetic induction remaining in a saturated magnetic material after the magnetizing field has been removed. Two common measurements expressed in Gauss are The Residual Flux Density, Br, and the Surface Field. A magnet doesn't have one specific amount of Gauss in it. We’re often asked if a magnet “has 10,000 Gauss.” This is a bit of a strange question, since Gauss is a unit of magnetism that can apply to different measurements or magnet properties. From our Magnet Grades article: How many Gauss is a magnet? A few different magnet properties are specified in gauss. While we've certainly heard this question before, it's not clear what answer you're looking for. Will magnets erase my hard drive or harm my computer? These were shortened over time to the "North" and "South" poles that we know them as.ģ) If you have a compass handy, the end of the needle that normally points North will be attracted to the South pole of the neodymium magnet.Ĥ) Use one of our Pole Identifier Devices.Īlso check out our article, Which Pole is North? Health, Safety, and Electronics This actually contradicts the "opposites attract" rule of magnetism, but the naming convention of the poles is a carry over from the old days when the poles were called the "North-seeking" and "South-seeking" poles. The North pole of the marked magnet will be attracted to the South pole of the unmarked magnet.Ģ) If you take an even number of magnets and pinch a string in the middle of the stack and dangle the magnets so they can freely rotate on the string, the North pole of the magnets will eventually settle pointing North. There are several simple methods that can be used to identify the (Scientific) North and South poles of neodymium magnets.ġ) The easiest way is to use another magnet that is already marked.
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