OverviewThe ndd EasyOne Air (2500-2) is a portable diagnostic spirometer for primary care, occupational health and pulmonary clinics. It uses ndd TrueFlow ultrasonic flow measurement and runs as a standalone handheld device or in PC mode with EasyOne Connect software.Key Features TrueFlow ultrasonic flow sensor stays stable over the life of the device, so no calibration is needed. Calibration checks are supported for NIOSH/OSHA, Social Security disability testing and facility QC protocols that require them. A check with the ndd 3 L syringe confirms the device is within limits but does not adjust it. Single-patient-use EasyOne FlowTube mouthpieces keep breath out of the sensor flow path, so no sensor cleaning is needed between patients. Color touchscreen. Portable mode stores and graphs tests on the device; PC mode works through EasyOne Connect, which exports HL7, XML, GDT and PDF for EMR integration. Quality grading and interpretation per ATS/ERS and NLHEP, with predicted sets including GLI and NHANES III (%Pred, Z-score, LLN). Configuration and Package Contents ndd order no. 2500-2: EasyOne Air spirometer with rechargeable battery USB cradle, which is required for PC sync and wired printing USB cable / power supply and USB Bluetooth adapter EasyOne Connect PC software EasyOne FlowTube, Quick Guide and Certificate of Stability Sold separately: FlowTube supply boxes, 3 L calibration syringe, printer Technical Specifications Model EasyOne Air spirometer, ndd order no. 2500-2 Measurement principle Digital ultrasonic flow measurement (TrueFlow) Tests FVC, FVL, tidal FVC/FVL, SVC, MVV, post-bronchodilator; bronchial provocation with EasyOne Connect Patient age 4 years and up Flow range ±16 L/s Flow accuracy ±2% or 0.020 L/s (PEF ±5% or 0.200 L/s) Volume accuracy ±2% or 0.050 L MVV accuracy ±5% or 5 L/min Resistance
