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The S461/T probe is used for the optical measure of turbidity in pure and
process waters up to 4000 NTU.
The probe uses the 90° scattered light method.
Applications
• Measure of turbidity in wastewater
• Measure of turbidity in primary, industrial, recirculating water
Features and benefits
• Reliable concentration measurement
using optical measuring process
• Infrared light pulsing beams scattering method
• Black rigid PVC and AISI 316 sensor body
• No mechanically moving parts
• Measured value pre-processing in sensor resulting in
low signal transmission sensitivity
• Immediate installation and easy manteinance
Turbidity measurement with the 90° scattered light method
By turbidity we mean the scattered component of a light beam which is
diverted away from its original course by optically denser particles in the
medium e.g. solid matter particles.
Measurements are made using the standardised 90° scattered light method in
accordance with ISO 7027 / EN 27027. The measuring method is based on
the Tyndall effect.
The turbidity of the medium is determined from the amount of scattered light.
The transmitted infra-red light beam is scattered by the particles in the
medium.
The scattered beams are measured by scattered light receivers which are
fixed at an angle of 90 to the
transmitted light. The measured scattered light signals are converted to
frequency signals.
The frequency signals are assigned to corresponding turbidity units and solid
matter concentrations,
and appear in the display.
S461T Infrared Turbidity Probe – Data Sheet
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