On the Automatic Turbidity Measuring Instrument

Abstract

When a continual measurement of turbidity in the sea water is automatically carried out by the use of the submarine detector measuring the attenuation rate of parallel light beam through the water, it seems generally that water-tight cases containing the light source and the light receiver are apt to become dirty for a while in the sea water. To avoid such a trouble even a little, an instrument suitable for the automatic determination of turbidity has been devised by the authors. The principle employed is the measurement of scattered light intensity through the water as well as that of attenuated light intensity. And thus, the light receiver consists of a photo conductive cell at the centre and the surrounding twelve cells for the attenuated light and the scattered light respectively. Some results and considerations are represented with this new type turbidity meter, which may be considered applicable for some practical purposes.