The OBS-3+ Turbidity Monitor is a submersible probe, part of our OBS® line of products that use a backscatter method to measure turbidity. The OBS-3+ operates in the range of 0 to 4000 NTU. It replaces the OBS3 on our price lists.
The OBS-3+ can be used in several applications, ranging from water quality in freshwater rivers and streams to sediment transport and dredge monitoring. The output for the OBS-3+ can be specified at time of order, allowing you to customize the sensor to match the datalogger being used to make the measurement.
Features
- Measured turbidity range: 0 to 4000 NTU
- Output can be specified: 0-2.5 V, 0-5 V, 4-20 mA
Specifications
- Nonlinearity of turbidity: 0.25 NTU
- Drift: less than 2% per year
- Settling time: less than 1 sec
- Input voltage: 5 to 15 Vdc (voltage); 9 to 15 Vdc (4-20)
- Maximum depth: 500 m (1640.5 ft)
- Infrared wavelength: 850 nm
- Length: 141 mm
- Outer Diameter: 25 mm
- Weight: 0.4 lb (181.4 g)
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