The safest and easiest way to calibrate is by having yours hands free. Now you may have had trouble doing that with the likes of Druck and its built-in pumps but no more...
Easy to use and we guarntee they won't leak. Easy to use and affordable, you won't want to be without it. 

Hand Pump PGV300 -3 to 300psi

This pump is hand held, light weight and doubles as both a pressure and vacuum sources for field use. Each pump is equipped with a micro-metering control verneer for fine adjustment and vent valve.

Calibration Pressure Pump PG300V:

• Output pressure: 0 ... 20 bar / 0 ... 300 psi
• Pressure media: air
• Fine adjustment: with adjustable volume control
• Outlet threads: 1/8" NPT
• Connectors: 1/4" poly-flow tubing or 1/4" plastic tube
• Dimensions: 220 mm / 8.66" (h), 100 mm / 3.94" (w)
• Weight: 0.4 kg / 1 lb

See also: 0-10,000psi Hand Pumps, PGH, Vacuum Pump, and Hand Pump Kit.