Pressure gauges are precision instruments designed to measure and display the pressure of liquids or gases in various industrial applications. They come in multiple types, including mechanical (Bourdon tube, diaphragm) and digital variants, catering to different pressure ranges and environments. Common features include durable construction, corrosion-resistant materials, and accuracy certifications like ASME B40.1. These gauges are widely used in oil & gas, chemical processing, HVAC, and water treatment systems to monitor process conditions and ensure safety. Some models offer additional functionalities such as pressure switches or transmitters for integration with control systems.