The Druck IUPM300 is the most accurate and reliable pressure calibrator on the market. With its patented technology, the IUPM300 can measure pressure with an accuracy of ±0.005% of reading, and it can generate pressure with an accuracy of ±0.01% of reading. The IUPM300 is also the most rugged pressure calibrator on the market, with a IP65 rating for dust and water resistance.