Diaphragm-type gauges are designed to detect small changes in differential pressure at high line pressures while eliminating fluid migration between high and low pressure areas. They are suited for use with orifice plates, venturis and pitot tubes. Series 1516 employs convoluted diaphragms housed in heavy-duty anodized aluminum or 316 stainless steel bodies for operation at line pressures up to 1,500 psig. The 2.5 to 6" dia. gauges provide differential pressure readings in the range of
0 to 1 through 0 to 50 psid. Switch and gauge-switch models are supplied with single- or dual-reed switches mounted in NEMA 4X water and dust-proof enclosures.