While I've never considered a respirator to be a fashion statement, there is a benefit to using one with a compact design such as these, especially if you're going to be working around harmful chemicals in tight spaces.įinally, the Ranksing ST-AX has been added for its medical-grade rubber construction and double-valve design for expelling moisture and heat. Both this option and the Parcil PT-60 have low profiles so they can be easily paired with safety goggles and face shields without compromising the dependability of their seals. We've included the Trend Stealth APF10, which uses pleated filters behind protective grilles to remove contaminants as small as 0.3 microns. Newly added this year are the Honeywell North 7600 Series and Honeywell North 7700 Series, the former of which delivers a 200-degree field of vision, threaded cartridge connectors, and five-point adjustable head strap while the latter option can be used in multiple configurations that include being paired with its optional backpack adapter for painting and welding projects. Moissanites also have a similar hardness to diamonds, so the HDE High Accuracy is better left for situations where you're trying to differentiate between natural gemstones instead of trying to detect lab-made ones.īecause they use a combination of testing methods, the Presidium Adamas and Gemlogis Mantis 3 in 1 are able to reliably test for synthetic gemstones, though they are pricier than many of their competitors.We've removed the Breath Buddy, SAS Opti-Fit, Stanley RST-64027, and Miller Half Mask models due to availability concerns. Synthetic moissanites, which are popular diamond alternatives, can often fool cheaper diamond testers, especially those that solely measure thermal conductivity, such as the Presidium Diamond Mate-C, since heat moves through both types of stone at about the same rate. Knowing the strengths and limitations of each of these methods will help you make a better decision when it comes time to purchase a tester. Most devices on the market test for phosphorescence, hardness, and electrical and thermal conductivity. In ranking these diamond testers, we paid close attention to the method they used to identify fakes. If you spring for an item like the Presidium Diamond Mate-C, which struggles to detect moissanite, you may want to purchase one of these UV flashlights for the added security of being able to run a UV light test on the stone. But almost all of them are, in fact, knockoffs of the HDE High Accuracy, so we've decided to keep them off the list and promote only the model that originally pioneered this design instead. There are many popular options out there that would, at first glance, appear as though they warrant a spot on this list. We've added the DiamondNight Dual Tester as well, because it's a particularly inexpensive option that can distinguish between diamonds and moissanite, though it does not work for any other gems or metals. We added the Presidium Multi-Tester III, another high-quality product from the well-known brand, which boasts and intuitive display and pleasant appearance, though it misidentifies some diamonds as moissanite. We had to remove the Gemetrix Melee Inspector in this update due to availability concerns.
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