This 2-1/2" Liquid Filled Compound Gauge offers a dual measurement range of 30"Hg to 15 psi, perfect for applications requiring both vacuum and pressure readings. The gauge features a lower mount with a 1/4" NPT connection, ensuring easy installation. The liquid fill dampens vibrations and protects the internal components, enhancing accuracy and longevity. Ideal for HVAC systems, refrigeration, and other industrial applications, this gauge is constructed from robust materials to withstand challenging conditions, providing reliable performance over time.