Note the variety in display aspect ratios between the models, ranging from a squarish 15:12 in the 19-inch model to the wide-format 16:9 in the 22-inch model. The 15-inch models have displays with the 4:3 aspect ratio that remains perfect for numerous legacy apps. The 10-inch model we tested has the 17:10 ratio popularized by tens of millions of netbooks a few years ago. Each aspect ratio has its pros and cons, each has custom software specifically coded for it, and software that work best on it. Human-to-machine interface touch displays usually don't require very high resolution, and so the pixel per inch range in this line is relatively narrow. It varies from 85 ppi in the 15-inch and 19-inch versions, goes up to 102-inch in the large 22-inch version, and our 10-inch version had 118 ppi, plenty enough for the intended purposes of these panels. Keep in mind that pixel density must match the application and the display size. It is not an absolute where higher density is always better. Pixel density must be matched to display size, application, type of device, and the distance the display is commonly viewed from. Smartphones can have extremely high pixel densities in the 800+ ppi range, but an "ultra-high definition" 70-inch 4k TV only has 63 pixels per inch. It all depends on the application and the viewing distance. The 10IB3S-SPH1-B (Whew! Industrial computer naming conventions area mouthful!!) Winmate sent us for evaluation is the smallest model of the Stainless B Series. Its display measures 10.1 inches diagonally in the 1024 x 600 pixel wide-format 17:10 aspect ratio. The hefty steel box weighs about 8.5 pounds (the specs sheets of the series don't list weight; not that it matters much, because they're all fix-mounts). The Stainless B Series has a style all of its own. In a way it's much like Tesla's Cybertruck: simple, blunt and yet totally unique, a marriage of highest tech and utterly practical. The blue, red and green pushbuttons are programmable. Functions could be as simple as Stop/Start/Pause, or they could work similarly to the three Android keys. The rotary switch, likewise, could probably be used for all sorts of settings. By default it sets the touch screen to Rain, Hand, or Glove mode. The big red Emergency button shuts things down. Turn it and it pops out. The entire housing is made of SUS316/AISI 316 stainless steel. SUS316 is a specific type of stainless steel that includes 18% chromium, 12% nickel and also molybdenum. Magnet do not stick to this mix. The steel is corrosion-resistant due to a so-called "passivation" layer/film on its surface. The molybdenum and higher chromium content increases the effectiveness of that layer, and the layer is self-healing. Scratch it and it fixes itself. This makes SUS316 steel perfect for marine applications, chemical processing and storage equipment, medical as well as gear used in refineries, medical devices, and deployment in any other environments where chlorides may be present. The backside of the 10IB3S-SPH1-B is just as simple as the front and sides. It's all the same brushed stainless steel. The backside is just a plate with holes for the sealed input/output ports. There is no need for cooling fins here. There's plenty enough cold, thick steel to dissipate what little heat the panel generates. Looking at the I/O ports you'll notice that these are not ordinary standard ports. Instead, all I/O ports use M12 style connectors. M12 connectors use a standardized, waterproof screw-on (or bayonet) design that is rugged, eliminates unintended disconnection, and can be used for various types of connectivity via a variety of standardized pin arrangements and coding. The 10.1-inch 10IB3S-SPH1-B has five such M12 connectors. They provide power, LAN/USB combined, power, RS232 serial, and the CN1 and CN2 ports that for front button control. In display-only versions one of the M12 connectors provides VGA video instead of serial. The two push button extension M12 ports each each carry eight wires, four each per button. Note that while the Winmate Stainless B Series has "only" an IP65 ingress protection rating, that rating applies to all cables plugged in. A rugged tablet may be IP67 rated, but only as long as all ports are covered by their protective plugs; with a cable plugged in, most are no longer water-proof. With their Stainless B Series, Winmate offers a very innovative solution for projects where touch is required, but also the ability to rapidly respond to emergencies or suddenly changing conditions. Those potentially crucial functions are implemented with large hardware controls that can be used to instantly control functions or external machinery or processes. This can cut cost, increase safety, enhance productivity, and eliminate relying on onscreen menus.Available in four different screen sizes from 10 to 21.5 inches — with each size available both as a computer or as a monitor only — Stainless B Series are designed to substantially reduce wiring and installation costs. Employing heavy-duty SUS316 stainless steel construction, Stainless B Series models are nearly indestructible. Screw-on waterproof M12 interface and power connectors mean the systems offer the kind of real-world sealing that doesn't rely on plugs or panel mounting