Dwyer A3000 Photohelic Pressure Switch with NPT Connection, 25 psi Max, 4% Accuracy

The Dwyer A3000 Photohelic Pressure Switch is an industrial-grade pressure measurement and control device engineered for accurate monitoring of pressure levels up to 25 psi with a precision of ±4%. It integrates a NPT thread connection suitable for secure pipe fitting and features a durable polycarbonate plastic body, ensuring mechanical robustness and temperature resistance up to 120°F (49°C). Designed for use in industrial environments requiring precise pressure regulation, it supports both low and high limit control functions, compliant with CSA, CE, and UL safety standards. The dial has a 4-inch diameter, providing clear analog readout for pressure monitoring. The unit weighs approximately 0.54 kg (1.2 lbs) and is mounted by screws for stable installation. The A3000 model is compliant with harmonized code 902620, categorizing it within precision instruments for pressure measurement.

This pressure switch is widely used for process control, biotechnology bioprocessing systems, and molecular diagnostics setups where reliable pressure monitoring is critical. Its accuracy and durability make it suitable for sensitive applications such as cleanroom environments and biomanufacturing pipelines, where pressure stability is essential for experimental integrity and production quality. Although this specific item is in used and non-functional condition, it remains valuable for internal component salvage or refurbishment within laboratory instrument maintenance workflows.