Thermal pulse time-of-flight liquid flow meter

A system for measuring liquid flow based on heat loss of thick film NTC thermistors

“…Постоје различите конструкције мерила протока и брзине течности на бази преноса топлоте. Према начину побуде сензора у мерилу, сви они се могу сврстати у три основна типа: 1. са константном температуром, 2. са константном струјом и 3. са мерењем губитка топлоте (калори-метријски принцип) [4][5][6][7][8].…”

Miniature Liquid Flow Sensor and Feedback Control of Electroosmotic and Pneumatic Flows for a Micro Gas Analysis System

“…In the beginning, the smallest microchannel was made for the flow sensor, but in such a case the sensitivity was high and the dynamic range was too small. Therefore, the adopted channel size was relatively big (2 mm w × 1 mm d), although the target flow range was below 50 µl min Time-of-flight types [6][7][8] are reliable for flow rate monitoring, but it was necessary to have a continuous signal for feedback control. Also, a small and inexpensive sensor with low-power consumption is a necessary condition for incorporating it into µGAS.…”

Numerical and analytic study on the time-of-flight thermal flow sensor

“…This type of flow measuring has been reported to be an appropriate solution to the problem of measuring small fluid flow. It can give a high accuracy and its linearity is excellent [4][5][6].…”