Turbidity Sensors / OBS-3-L
RETIRED ›
This product is no longer available and has been replaced by: OBS-3+,OBS300. Some accessories, replacement parts, or services may still be available.
OBS-3-L D&A Instrument Company Turbidity Monitor

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.

Dataloggers

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

Documents

Case Studies

New Zealand: Water Quality Monitoring
High-grade coal has been mined on the West Coast of New Zealand since the 1870s.......read more
OBS Turbidity Sensors
D & A Instruments (now part of Campbell Scientific) assisted the USDA National Sedimentation Laboratory......read more

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