Product description Turbimax CUS51D
10 Endress+Hauser
A0030845
4 Arrangement of light sources and light receivers
1, 2 Light sources 1 and 2
3, 5 135° light receiver
4, 6 90° light receiver
The sensor covers a broad range of turbidity and solids measurements thanks to the
optical arrangement with 2 light sources, each with 2 light receivers placed at different
angles (90° and 135°).
• As soon as the customer selects an application, e.g. Activated sludge, the optical
method best suited for the particular measuring task is automatically activated in the
sensor (e.g. 90° measurements with both light sources).
• The double sensing system (2 light sources with 2 receivers per source) largely
compensates for measurement errors caused by fouling (4-beam pulsed light method
→ 10).
The sensor types available vary in terms of their measuring ranges and therefore the
range of available applications.
3.1.2 Measuring methods
4-beam pulsed light method
The method is based on 2 light sources and 4 light receivers. Long-life LEDs are used as
monochromatic light sources. These LEDs are pulsed alternately and generate 4 scattered
light signals per LED pulse at the receivers.
This offsets interference influences such as extraneous light, LED aging, fouling of
windows and absorption in the medium. Depending on the chosen application, different
scattered light signals are processed. The signal type, number and calculation are stored in
the sensor.
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