For best results, use only Industrial Scientific calibration equipment for regular instrument calibration and maintenance. All Industrial Scientific calibration cylinders are manufactured to the highest quality standards and include NIST traceable blend techniques, analytical leak testing of every cylinder, certified component concentrations and clearly marked lot numbers and expiration dates.
This Industrial Scientific 34 liter of 20.9% O2 is used to zero all ISC instruments and AirAware.
If you have any questions regarding your calibration gas or just want to make sure you are selecting the correct combination.
Please note that this cylinder of gas has a 36 month expiration. Durawear ships the newest cylinders of gas that are available from the manufacturer.