Turbidity Sensors / OBS-3-L
RETIRED ›
This product is no longer available.
OBS-3-L D&A Instrument Company Turbidity Monitor
Services Available
Repair No
Calibration No
Free Support No

Overview

The OBS-3 measured both turbidity and suspended solids. Its turbidity range was 0 to 4000 NTU. A nearly linear response to particle concentrations of turbidity spanned more than three orders of magnitude. (OBS® is a registered trademark of Campbell Scientific.)

The "-L" on a product model indicates that the cable length is specified at the time of order.

Images

Specifications

Non-Linearity of Turbidity 2% (formazin, 0 to 2000 FTU)
Drift < 5% (per year)
Settling Time < 1 s
Input Voltage 9 to 16 Vdc
Infrared Wavelength 875 nm
Maximum Depth 500 m (1640.5 ft)
Diameter 3 cm (1.2 in.)
Length 18 cm (7.1 in.)
Weight 181.4 g (0.4 lb)

Compatibility

Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Data Loggers

Product Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR295X (retired)
CR3000 (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR800 (retired)
CR850 (retired)
CR9000 (retired)
CR9000X (retired)

Documents

Case Studies

New Zealand: Coal Mine Water Quality Monitoring
High-grade coal has been mined on the West Coast of New Zealand since the 1870s.......read more
Southeastern U.S.: Sediment Production Study
D & A Instruments (now part of Campbell Scientific) assisted the USDA National Sedimentation Laboratory......read more

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