Ashcroft engineers apply decades of expertise to the design of instrumentation to measure, monitor and control differential pressure (d/p). The complete line of Ashcroft d/p devices includes gauges, digital indicators, transmitters and switches. With d/p ranges down to fractions of an inch of water and devices designed to contain high static (line) pressures, these instruments are used in nearly every industry; from controlling room air pressure to monitoring the flow of fluids across filters and membranes.