Cecomp Electronics, F4AD1000INHGG-CD, F4AD Low Voltage Powered Digital Pressure Gauge with Calibration Data, 5 Test Points, Test Date, 0-1000 Inches Hg (0 Deg C), Reference Pressure Features: 316L Stainless Steel Wetted Parts Ruggedized Design, Simple Operation Ideal for permanent installation where gauge is on at all times