|WORLD METEOROLOGICAL ORGANIZATION||
|Explanation of the criteria for classification and numbering of components||
|Explanation of the dates on the component's description|
PRECISION TURBIDITY RECORDING METER
1. Purpose and objectives
This instrument measures and prints records of turbidity in rivers, lakes and reservoirs, and groundwater.
This instrument can be used automatically for periods of over 30 days with dry cells (Size D), eliminating the necessity of a commercial power supply. The integrating sphere method is used for measuring. Because this method measures ratios between scattered and transmitted light, error due to variation in wave lengths is reduced to a minimum and coloured water can also be measured. Values equivalent to those obtained in the laboratory can be obtained.
This instrument operates by dividing turbidity in the water into scattered and transmitted light, and then outputs turbidity values.
Turbidity values are recorded and printed out digitally with a printer.
5. Operational requirements and restrictions
This measuring unit can be installed and operated without any technical expertise. However, it would be an advantage for the operator to have a basic knowledge of water quality concepts as well as of electricity. This instrument can be used in a temperature range of -5C° to +50C°. The detecting element can be used at depths up to 100 m and can measure a range from 0 to 500 ppm. It is also equipped with an automatic wet scrubber for long-term measuring.
6. Form of presentation
Brochures are available. An instruction manual is supplied to users upon installation.
7. Operational experience
Approximately 400 units have been sold in Japan since commencement of sales in 1988. It has also been exported to China.
8. Originator and technical support
CTI Science System Co., Ltd.
10. Conditions on use
Instrument is available for sale. Catalogues are available free of charge.
|(First entered: 01 FEB 93||
Last updated: 21 APR 00)