A line of piston-type differential pressure instruments, switches, and gauge-switch combinations is available for demanding industrial applications in filtration, pumping, and heat exchange operations. The units are engineered as a rugged and economical choice for use with liquids. Series 1200 and 1300 instruments include a piston-magnet sensor (shown) that responds to changes in pressure. The sensor is magnetically coupled to a dial pointer shaft that is isolated from the pressure chamber. Fabricated from aluminum, 316 stainless steel, or naval brass, the instruments are rated for 3,000 to 10,000 psig line pressures and offer selectable differential pressure ranges from 5 to 1,000 psid, depending on the model. Switches or gauge-switch combinations are available with multiple reed switches and water, oil, and dust-proof Nema-4X Class 1-Div. 1 and Class 1-Div. 2 switch enclosures for harsh environments.

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