Robust and hardwearing
Features comfortable integral mouthpiece
Suitable for adults and children
Suitable for multi-subject use with SafeTway mouthpiece
Variable orifice simple mechanical peak flow meter
Better than 5% or 10 L/min whichever is greater repeatability
Better than 5% or 10 L/min whichever is greater inter-instrument variation
Daily record chart included
Piston/spring and moveable pointer measuring principle
A/B difference less than 15 L/min/15% frequency response
Multi-language instruction sheet
0 to 50 °C Storage
