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A simple flowmeter for unusual gases.

I Farquhar1, P Eldridge

  • 1University Department of Anaesthesia, University Hospital, Nottingham.

British Journal of Anaesthesia
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

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This study introduces a low-cost, adaptable flowmeter for measuring gas flow in experiments. The device utilizes a simple pressure measurement to accurately control gas flow rates, even at low volumes.

Area of Science:

  • Experimental physics
  • Medical device engineering
  • Gas dynamics

Background:

  • Accurate measurement of gas flow is crucial in various experimental settings.
  • Existing flowmeters can be expensive or lack adaptability for diverse gases and flow rates.

Purpose of the Study:

  • To describe a novel, cost-effective flowmeter for measuring gas flow in experimental situations.
  • To demonstrate its adaptability for any gas or gas mixture and low flow rates.

Main Methods:

  • The flowmeter employs a mercury-in-glass manometer (sphygmomanometer) to measure gas pressure.
  • This pressure is measured proximal to a flow restrictor, specifically a hypodermic needle hub.
  • The pressure head directly dictates the gas flow rate for a given gas.

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Main Results:

  • The described flowmeter can measure gas flow rates as low as 50 ml min-1.
  • It is adaptable for use with any gas or gas mixture.
  • The device is accurate and easy to calibrate.

Conclusions:

  • This flowmeter offers a minimal-cost solution for precise gas flow measurement in experimental settings.
  • Its design is suitable for production within hospital environments.
  • The device provides an accurate and adaptable method for gas flow control.