RETIRED ›
This product is no longer available. Some accessories, replacement parts, or services may still be 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.)

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Compatibility

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Dataloggers

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

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
  • Maximum depth: 500 m (1640.5 ft)
  • Infrared wavelength: 875 nm
  • Diameter: 1.2" (3 cm)
  • Length: 7.1" (18 cm)
  • Weight: 0.4 lb (181.4 g)

Related 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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