QRS 3L Spirometer Calibration Syringe
**SPECIAL ORDER ONLY**
Item No: CZ-Z-723000-00
The QRS 3L Spirometry Calibration Syringe allows you to check the volume accuracy of your QRS Orbit spirometer at least daily, as per ATS guidelines. Although QRS Orbit spirometers cannot be calibrated in the field, the syringe allows you to check your calibration. If your calibration is off, please contact QRS for recalibration of your spirometer.