Model S20-SWW, S40-SWW and T30-SWW - Suspended Solids / Turbidity Sensor - Operating Manual

Technologies commonly used in Suspended Solids and Turbidity Sensors. Phathom uses the four beam alternating light ratio-metric system of measurement for its sensors. Suspended Solids Sensors and Turbidity Sensors measure the change in light intensity to produce a relative measure of the solids or turbidity concentration in the liquid being monitored. Most commonly sold suspended solids sensors and turbidity meters use only a single beam of light. When a single beam of light is used the intensity of the light can be influenced by not only the solids particles suspended in the liquid, but also any solids/contamination that are stuck to the surface of the sensor and variability of the light source and photo diode as they age. Therefore it is critical to keep single beam sensors very clean to get accurate readings.