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- Dimensions: 109mm (length) x 63mm (width) x 42mm (height)
- Flow Detection Principal: Stator rotor
- Accuracy: Better than ± 3% (FEV1)
- Back pressure: Less than 0.15kPa/L/second @ 14L/s
- Measurement Range: FEV1: 0 – 9.99 L BTPS
- Maximum test duration: 6 seconds
- Quality Check: Slow start of test (Vext>5%) or a cough detected in the first second
- Power Supply: 3V (2 x 1.5V AAA batteries)
- Expected Battery Life: 3 months of use at 3 tests per day
- Performance standards & guidelines: ATS/ERS 2019, ISO 23747:2015, ISO 26782:2009
- Auto power down time: 2 minutes
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We want you to be 100% satisfied with your purchase. Items can be returned or exchanged within 30 days of delivery.