The Additel 901 Low Pressure Test Pump is a hand-operated pneumatic pump designed for accurate low-pressure calibration in both the lab and field. With a range from –6 psi (–0.4 bar) vacuum to +6 psi (0.4 bar) pressure, the ADT901 provides outstanding stability and control, making it ideal for calibrating low-pressure gauges, transmitters, and switches.
Unlike traditional pumps that rely on check valves, the ADT901 uses a unique isothermal bellows chamber to minimise leakage and eliminate pressure drift caused by temperature changes or handling. Its fine screw-press adjustment delivers a resolution as precise as 0.1 Pa (0.001 mbar), ensuring reliable, repeatable calibration results.
Compact and portable at just 1.6 kg (3.5 lb), the ADT901 is easy to transport and set up. With hand-tight quick connectors, users can connect test and reference gauges without tools or PTFE tape.
