The Air Pressure Gauge | Dry | 4 in. | 0–300 PSI | Plastic (100-325-00920) is a reliable, economical gauge designed for monitoring compressed air in fire protection, pneumatic, and general mechanical systems. With a full-scale range of 0–300 PSI, this gauge is well-suited for air supplies serving dry and preaction sprinkler systems, compressor discharge lines, and a wide variety of building and industrial air systems.
Featuring a 4-inch dial, the gauge provides excellent readability, with bold, easy-to-read markings and a clear pointer that allow technicians, inspectors, and maintenance personnel to quickly verify system pressure at a glance. The durable plastic case offers lightweight corrosion resistance, making it ideal for indoor mechanical rooms, riser assemblies, and control valve locations where a cost-effective yet dependable pressure indicator is needed.
As a dry gauge, it operates without liquid fill, providing quick response and simple operation in applications where glycerin-filled designs are not required. The internal movement is engineered to deliver consistent performance under normal vibration and pressure cycling, helping maintain reliable indication across the entire 0–300 PSI range.
Well-suited for fire sprinkler contractors, facility maintenance teams, and service technicians, the 100-325-00920 Air Pressure Gauge offers a practical combination of visibility, durability, and broad pressure capability, making it a solid choice for everyday monitoring of compressed air systems in commercial, industrial, and life safety environments.
