Testo 0563 0510 510 differential pressure meter testo 0563 0510 p the testo 510 differential pressure meter measures air pressure from 0 to 100mbar and airflow from 10 to 100m s via a pitot tube results can be displayed in pa hpa mbar mmh2o mmhg inh2o inhg psi m s flow fpm flow the differential pressure measurement has temperature and air density compensation for accurate readings p testo 0563 0510 510 differential pressure meter