Sensor cube determines water quality with SAC measurement
To determine the quantity of dissolved organic compounds in a water sample, the spectral absorption coefficient (SAC) is measured at 254 nm. In order to integrate this important parameter of water in analysis in its online analysis system Bürkert has miniaturised the measuring principle and integrated it in a sensor cube.
The SAC sensor cube measures a mere 44 mm x 100 mm x 158 mm and can be used with a handle while the Bürkert online analysis system is running. It automatically conducts an optofluidic measurement of the water sample, including all calculations, averaging and corrections and transmits the result - the SAC value of the water - to the EDIP (efficient device integration platform), which enables intelligent networking of all electronic Bürkert devices.
The sensor consists of a lamp module with a Xenon flash lamp, a spectroscope and the electronics with integrated software. The software independently induces measuring cycles once the sensor is connected. During the measurement, the light pulse of the lamp passes through an opening at a 90° angle to a cuvette consisting of two sapphire windows. Sample water continuously flows through the cuvette. The light passes through a lens, an aperture, optical grid and a focussing lens to the 1.5 mm detector array.
A complete, fully automatic microspectrometer for water samples the size of an online analysis system sensor cube is a pioneering innovation and underscores the microfluidic and system solution expertise of Bürkert Fluid Control Systems.
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