American Sensor Technologies” AST4600 and AST46HA Series of Explosion-Proof Pressure Transmitters feature new pressure ranges, materials and options. The pressure range has been increased to 20,000 PSI for deep well drilling applications. A Waspalloy material option enables use in the processing of heavy oil and high sulfidation. Waspalloy is a cobalt-based alloy material offering corrosion resistance to H2 & H2S. A new fail-mode indicator option gives the user more control over how their systems react should the sensors fail. Vented gauge reference allows for low pressure ranges. F250C female process ports are available for high-pressure process connections. Class 1, Div 1, Groups A, B, C, D approvals for the AST46HA make the transmitter suitable for use in acetylene and hydrogen environments. Sealed gauge versions are approved for Class 2, Div 1 Groups A,B,C,D for mining applications and installations.