These versatile instruments provide calibrations from 1-30 inHg vacuum (0.03-1 bar) and 3-500 psi (0.2-35 bar) in one extremely accurate yet easy to use primary standard. A selector valve converts the unit from pressure to vacuum mode without the need to exchange pistons. Units are manufactured to the highest standards with certified accuracies traceable to International Standards Laboratories such as the National Institute of Standards and Technology (NIST). These piston/cylinder type pneumatic standards provide excellent stability, repeatability and accuracy. An optional built-in hand pump can be added for both pressure and vacuum generation.
<ul>
 	<li>0.015% of reading accuracy standard (0.008% optional)</li>
 	<li>1-30 inHg vacuum (0.03-1 bar vacuum)</li>
 	<li>3-500 psi (0.2-35 bar) pressure</li>
 	<li>inH2O and mbar ranges available</li>
 	<li>Series 3 non-magnetic stainless steel weights</li>
 	<li>Units can be trimmed to local gravity FOC</li>
</ul>