www.foodengineeringmag.com/articles/88171-differential-pressure-gauges
Differential pressure gauges
September 1, 2010

Suitable for a wide range of applications, Ashcroft 1130 series differential pressure gauges come with dial sizes from 2 to 6 in. A variety of case materials along with an optional explosion-proof housing allow the gauges to operate safely in hazardous environments. They include a close-coupled magnetic rack-and-pinion movement for increased stability and reliability.
Ashcroft Inc.; 800-328-8258; www.ashcroft.com