The OBS-3+ is a submersible, turbidity probe that has sideways-facing optics while the OBS300 has downwards 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. Campbell Scientific dataloggers measure the OBS-3+ probe's output and calculate turbidity.
Benefits and Features
Sideways or downwards facing opticsto suit the application
Measures suspended solids and turbidity for up to 4000 NTUs
Provides a compact, low-power probe that is field proven
Accurate and rugged
Compatible with all Campbell Scientific dataloggers
Stainless-steel body allows use down to 500 m in fresh water
Titanium body allows use down to 1500 m in fresh or salt water
Fitted with MCBH-5-FS, wet-pluggable connector-multiple mating cable length options available
Drift: less than 2% per year
Maximum Data Rate: 10 Hz
Infrared Wavelength: 850 nm ±5 nm
Daylight Rejection: -28 dB (re: 48 mW cm-2)
Optical power: 2000 µW
Turbidity Accuracy: 2% of reading or 0.5 NTU (whichever is larger)
Housing material: 316 stainless steel or titanium
Maximum Depth:Stainless-Steel Body: 500m; Titanium Body: 1500 m
Output: Optional 2.5VDC, 0-5VDC or 4-20mA
We can now supply Amco Clear® Turbidity standards in a range of NTUs for calibration of OBS-3 series sensors. This is a safe, non-toxic and disposable alternative to Formazin. Please contact us with details of your requirements.