ST-730 Series is designed for monitoring the middle range turbidity in various applications while the ST-73X Series is for very low turbidity applications. It is more robust and tolerant to fouling, matters, and air bubbles comparing to other online turbidity meters designed for relatively clean water applications. The turbidity sensor measures two optical densities and two scattering intensities at two wavelengths. The white LED and IR LED 90° dual wavelength scattering achieves more reliable and accurate reading in a complex flow system. This helps measure a large turbidity range and yet maintain a fine resolution. This design also helps the sensor run self-diagnostics.
Typical applications are industrial water treatment process control including raw water, cooling water, and wastewater; surface water monitoring; and other chemical processes with middle range of turbidity. The Ultra-Low Turbidity sensors are designed for drinking water applications.