American Sensor Technologies, a manufacturer of MEMS-based pressure sensors, transducers and transmitters based in Landing, NJ, offers the Model AST 4600 Explosionproof Pressure Sensor for use in hydrogen service and other hazardous applications such as refineries, water treatment plants, natural gas compressors and power generation. Employing a thick one-piece 316L diaphragm free of internal O-rings, welds and fill fluids, the AST 4600 pressure transducers are designed to perform accurately and safely in hydrogen applications without the threat of sensor failure caused by hydrogen permeation. Approved to CSA 30 (UL 1203) Class 1, Div. 1, Explosionproof, Groups A, B, C and D, units can withstand the high vibration and temperature extremes common in hydrogen applications. Constructed of 316 L stainless steel wetted materials, the AST4600 Explosionproof Series provides long life and high resistance to embrittlement caused by long-term exposure to hydrogen. The high-strength stainless steel construction contains no silicone oil, no welds, and no internal “O” rings, offering a full hermetic seal against corrosive media. In addition to using strain gauge technology, the Company implements its own-patented Krystal Bond(tm) Technology to produce pressure transducers that yield a high output with low thermal errors.