By any measure, ZeroDT surge-protection products are clearly superior. They’re designed small enough to fit inside the sensor unit housing, so there’s no need to pay for an external enclosure. They come with a 5-year warranty. And while competitor products begin degrading on day one, seldom lasting more than 3-5 years, ZeroDT products perform at 100 percent capacity every time, offering end-to-end protection of your most critical measurements, communications, and power systems.