3D Instruments 25504-26B71 is a 4.5-inch process gauge designed for inline pressure measurement, featuring a 0–300 psi scale and a 1/4" NPT male bottom-mount connection for easy integration into piping or instrumentation lines (4-1/2 in dial, 0–300 psi, bottom-entry 1/4" NPT). As part of the Series 25 family, it provides 0.5% midscale accuracy, ensuring reliable readings across its range. The bottom-entry 1/4" NPT port aligns with common industrial fittings, and the 4.5-inch dial offers legible display from a distance. Some distributor catalogs note this model as discontinued by the manufacturer, which can affect availability and replacement options.
