The hydrostatic pressure-level sensors are approved to UL/cUL913 (CSA 157) Class I Div. 1, Groups C and D for use in intrinsically safe areas with an approved barrier. The MAD4500 and MAD4510, ruggedly constructed from high-strength stainless steel, are compatible with a wide range of liquids, and are suited for outdoor and indoor applications. The sensors utilize unique diaphragm technology and solid-state design that provide high accuracy, reliability, and versatility in various vessel configurations with liquid pressure up to 100 psig. Other benefits include a wide operating temperature range and EMI/RFI protection.