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The Mercoid Pressure Switch Diaphragm 30 to 500 psi is designed for use in pressure sensing applications where hazardous locations are present. With its weather-proof construction and range of 12 to 45 psi differential, it's an ideal solution for activating one or two SPDT snap switches. Its 30 to 500 psi range makes it suitable for various applications that require pressure detection. The 1-Port 1/2 in FNPT ensures easy installation and compatibility with a wide range of systems. With its high accuracy, reliability, and durability, this pressure switch is an essential tool for professionals in the oil, gas, and chemical industries, as well as in water treatment plants, manufacturing facilities, and other industrial settings where precise pressure control is critical.