Concept
Campbell Scientific OBS-3+ turbidity probe and optical backscatter sensor
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL1838/1/ | |
|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | |
| Alternative Labels | Campbell OBS-3+ | |
| Definition | The OBS-3+ is a compact, submersible turbidity probe and optical backscatter (OBS) sensor that has sideways-facing optics. It uses OBS technology to measure suspended solids and turbidity for applications ranging from water quality in freshwater rivers and streams to sediment transport and dredge monitoring. The OBS-3+ emits near-infrared light (850 nm +/- 5 nm) into the water, then measures the light that bounces back from the water���s suspended particles. Campbell Scientific data loggers then measure the OBS-3+ probe's output and calculate turbidity. The sensor is capable of measuring suspended solids and turbidity at 10 Hz for up to 4000 NTUs, in depths up to 500 m (stainless-steel body) or 1500 m (titanium body). Concentration accuracy is 2% of the reading or 1 mg/l (whichever is greater) for mud, or 4% of the reading or 10 mg/l (whichever is greater) for sand, and turbidity accuracy is to within 2% of the reading or 0.5 NTU (whichever is greater). | |
| Date | None | |
| Identifier | TOOL1838 | |
| Note | accepted | |
| Is Version Of | TOOL1838 | |
| version | 1 | |
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