SDI 3L Calibration Syringe with Adapter for Astra Spirometers

All SDI spirometers use turbine technology (rather than differential pressure technology), they are not affected by fluctuations in temperature, barometric pressure or gas viscosity.

ATS does recommend a daily calibration check on all spirometers (regardless of technlogy) and if the facility is doing social security disability testing then a need for daily calibration check is required.