The present invention provides an improved, low cost method and apparatus for monitoring the intravenous metering of fluids to a patient. The present invention provides a strain gauge which is preferably a balanced metal beam. Conditioning circuitry is provided which has as input the strain gauge output....http://www.google.es/patents/US5399171?utm_source=gb-gplus-sharePatente US5399171 - Intravenous metering monitoring device
