Turbidity sensor 702A

Turbidity sensor for immersion installation, for nephelometric turbidity measures. Measuring system includes a light source and a light receiver. The emitted light beam hits the liquid surface and is scattered by the suspended particles in the sample. The scattered light is measured at 90° (light scattering 90°); the intensity of this scattering is proportional to suspended solid content in the sample. This system is based on a single light beam and is called 'nephelometric'. Measuring units are NTU (Nephelometric Turbidity Units). Nephelometric cells Mod.702A and 702B are powered by a highly stabilized source so that emitted light is perfectly constant even with power mains variations of +/- 15%. The light source is a IRED diode (880 nm). The light receiver is a silicon photodiode. Mod.702B probe is supplied c/with the hydraulic system for chemical cleaning; the cleaning sequence is directly driven by the uP electronic unit. Sensor body is PVC, 42 mm diameter, 600, 1000, 1500 mm lengths. A sliding flange, DN32, is supplied for probe installation. Measuring range: 0-2 / 2000 NTU Allowed immersion depth: 10-1500 mm, according to selected probe length Flow direction: any flow direction is accepted; the sample must be free of bubbles. Probe mounting: in a vertical position