836-C3EX15A - 836 Pressure Controls - General Industrial, Device Style C, External Copper Alloy Bellows, Type 7 & 9 and 4 & 13 Combined Metallic Aluminum enclosure, X15A, External Manual reset contact block. Single pole double throw, one contact normally closed - contact opens on rise and remains open until system is restored to normal run condition at which time contact can be manually reset. A second contact closes when the first contact opens. - Quad Industry GmbH