The Ruska 2465 has been a workhorse in pressure calibration labs since its introduction back in the 1960s. The PG7601 Piston Gauge from DHI, is the modern-day alternative. PG7601 has become the first choice in reference standards for leading calibration facilities, including more than 20 national measurement institutes and the US Air Force.

PG7601 provides outstanding performance with many features and benefits:

• Covers gauge and absolute pressure from less than 7 kPa to 7 MPa (1 to 1,000 psi), plus negative gauge and low differential around atmosphere (with option)
• State-of-the-art measurement uncertainty with detailed uncertainty analysis
• Integrated system includes all real time measurements and calculations—no external devices or software required
• Piston-cylinders are self-contained modules that can be installed and removed without taking them apart and exposing critical working surfaces
• Large diameter pistons are easy to float, with very low drop rates
• Piston-cylinders typically operate days or weeks without cleaning, and don’t require regulation of pressure slew rates
• Reference vacuum pulls down to <3 Pa (20 micron) in one minute or less – and automated mass handling can eliminate breaking vacuum between set point.
• Automate fully now or later by adding a standard pressure controller and/or automated mass handling accessory