A pressure transducer for depth measurement and a conductivity probe are available as options. These later two systems provide data logging capability, store up to 200,000 lines of data, and include PC software for system setup and data retrieval.Įach OBS-3A has a turbidity sensor and a temperature sensor.

We’ve already begun production of the OBS-3+ probe, and the OBS-3A and OBS-5+ water-quality systems. The OBS technology works by emitting a near-infrared light into the water, then measuring the light that bounces back from the suspended particles. Production and business operations have been moved to our headquarters in Logan, Utah, and we are now responsible for all warranty repairs, quotes, orders, and any other business regarding D&A Instrument products. These sensors monitor turbidity and suspended-sediment concentrations using optical backscatter (OBS) technology.Ĭampbell Scientific recently purchased D&A Instrument Company and their OBS product line. For many years, Campbell Scientific has carried the OBS-3 and OBS-3+ sensors from D&A Instrument Company.

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