Standard Touch Screen PLC Control and Standard Dryer Features That Others Call Options! Add a vacuum loader to this portable dryer/hopper combination and mate it to your existing system with the assurance that you can dry any resin efficiently. The NWB-HC-PLUS models include a 7-inch, high-resolution, color, touch-screen PLC with advanced features like OverDry Protection, photo-assisted diagnostics, trending and data logging. If you just need a basic Portable Dryer/Hopper model, choose the NWB-HC with a 4-inch color touch screen PLC without the advanced features. All models have a 5-year warranty for the lowest cost of ownership.