Mid-West Instrument's new Model 522 differential pressure/indicator switch is a diaphragm-type unit that features complete high- to low-side isolation, which is said to make it ideal for low-flow monitoring of heat exchangers in geothermal applications.
The 522 features a max static pressure of 1000 P.S.I.G. (69 bar), a max differential over-range pressure of 200 P.S.I.D.(13.89 bar) and differential pressure ranges of 0-5 to 0-50 P.S.I.D. with ± 5% F.S accuracy.
Body materials are aluminum or 316/316L stainless steel with 316 SS, ceramic and acetal moving parts.
The 522 unit is available with one or two field adjustable (40% to 100% FS) hermetically sealed reed switches in SPST (3 amp) configuration. Features up to 240 VAC/VDC voltage ratings, flying leads or DIN type connectors and can be custom designed to meet mounting requirements or operating conditions. Dial accuracy ± 5% standard with a five-year warranty.