The 3 liter syringe, from Hans Rudolph, is used to calibrate Pulmonary Function Testing equipment including: Koko Spirometers, Cybermedic
Full Gas Systems, Cosmed Quark RMR, Cosmed Quark PFT and Spirometers, Morgan Scientific, and Collins Full Gas Systems.
The calibration syringe, having a known calibrated volume as a standard, provides an easy and reliable method of calibrating
and measuring the accuracy of respiratory volume measuring equipment in the field on a regular basis to satisfy quality assurance programs.
Three liters has been recommended as the minimum volume to test spirometers.