Liquid quantity indicator

摘要: Apparatus for sensing the volume of liquid remaining in a flexible container from which is withdrawn, such as an irrigation or infusion bag to provide alarm signal when falls below predetermined level comprises jaw members (41, 42) biassed towards closed position and means (50, 51) operatively connected at least one said emitting dependence upon spacing 42), being positionable against walls whereby move falls. It preferred that apparatus suspended lower edge container. Preferably are shaped define inwardly-directed front end regions spaced-apart central whereby, use, contact with accommodate without lowermost portion holding residual after has fallen regions.