WIKA 52929743 0-20psiD Type 70X.05 DP Gauge with MagneticPiston Sensing Element and Separating Diaphragm Material of Wetted Parts: Ceramic magnet and 316 SS Overpressure Safety/Working Pressure Maximum: PN 200 bar Unit of Outer Scale: psid Nominal Size: 2.5" Measuring System: Stainless Steel Scale Range: 10 psid Window: acrylic (PMMA) Process Connection: 2 x 1/4 NPT Female Connector location: top/bottom connections Separation Diaphragm / Sealing: Buna-N