21. Ultrasonic flow meters that use the Doppler shift are called Reflection or Doppler flow meters. 22. "I would still go with a peak-flow meter rather than a calendar, " she said. 23. He strongly recommended the use of a peak-flow meter , which is advised for most asthmatics. 24. One problem can be to assemble the measuring equipment inline, especially the oil flow meter . 25. There are three different types of ultrasonic flow meters . 26. Other corrections specific to particular types or manufacturers of flow meters may also be implemented. 27. A " virtual flow meter " is a type of an implementation using such methods. 28. The animations on the right do not represent an actually existing Coriolis flow meter design. 29. Ultrasonic flow meters that use the Doppler shift are called Reflection or Doppler flow meters . 30. Optical flow meters use light to determine flow rate.
