Diaphragm Pressure Gauges are pressure measurement instruments that use a flexible diaphragm as their sensing element. They are particularly useful for low-pressure measurement and for applications where process media, such as viscous, contaminated or corrosive substances, require a suitable diaphragm design and compatible materials. These gauges are used in chemical processing, petrochemical plants, water and wastewater treatment, power generation and industrial machinery. The appropriate gauge depends on the pressure range, process medium, operating temperature, material compatibility and connection requirements.