title: The ejector flowmeter: an evaluation of its accuracy.
abstract: The accuracy of five ejector flowmeters was assessed using three different gases and four flow-rates. A soap-bubble flowmeter was used for the calibaration. Significant variations were found between individual flowmeters and between different gas mixtures. No variation was found between the four different flowrates, indicating that the calibration is linear. The mean calibration factor was 84.8% +/- 4.1 (100% O2:87.4 +/- 3.4, 50% N2O/O2: 84.2 +/- 2.8, and 100% N2O: 83.0 +/- 4.6).
mesh_terms: D000769:Anesthesia, Inhalation / Q000295:instrumentation*; D000777:Anesthetics; D002138:Calibration; D005069:Evaluation Studies as Topic; D005740:Gases; D012212:Rheology / Q000592:standards*
chemical_list: D000777:Anesthetics; D005740:Gases