We have five unique features for our Ruichao PFT products:
1) Ultrasonic Flow sensor for all of measurements (Spirometry/Diffusion/Bodyplethsmograph/Ergospirometry),
2) No common breathing part for all of measurements,
3) calibration free, no volume calibration, no ambient calibration, no Gas analyzer calibration.
4) HL7 interface embedded, standard package support hospital Information system without any extra cost
5) One system box design for all of different configurations of device, easy for service
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