This product is not available for new orders. We recommend ordering: ClariVue 10.
| Services Available | |
|---|---|
| Repair | No |
| Calibration | No |
| Free Support | Yes |
Visão Geral
The OBS300 is a submersible turbidity probe that has downward-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 data loggers measure the OBS300 probe's output and calculate turbidity.
Leia maisBenefícios e Características
- Downward-facing optics avoid obstructions around the sides of the probe
- Measures suspended solids and turbidity for up to 4000 NTUs
- Provides a compact, low-power probe that is field proven
- Stainless-steel body allows use down to 500 m in fresh water
- Compatible with most Campbell Scientific data loggers
- Titanium body allows use down to 1500 m in fresh or salt water
- Accurate and rugged
- Fitted with MCBH-5-FS, wet-pluggable connector—multiple mating cable length options available
- Offers an optional five-point sedimentation calibration for better measurements (see Ordering Info on the web page)
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Descrição Técnica
The OBS300 uses its downward-facing optics to emit a near-infrared light into the water. It then measures the light that bounces back from the water’s suspended particles.
If an obstruction is in the emitted light’s range, the light will scatter back and the turbidity reading will be too high. This probe's downward-facing optics avoid obstructions around the sides of the probe. The OBS-3+ is available for locations that have obstructions above and below the probe. (OBS® is a registered trademark of Campbell Scientific.)
Compatibilidade
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible 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) | ||
| CR300 (retired) | ||
| CR3000 (retired) | ||
| CR310 | ||
| CR500 (retired) | ||
| CR5000 (retired) | ||
| CR510 (retired) | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (retired) | ||
| CR9000 (retired) | ||
| CR9000X (retired) |
Especificações
| Range |
|
| Maximum Submersion Depth |
|
| Maximum Concentration Range |
|
| Concentration Accuracy |
|
| Operating Temperature Range | 0° to 40°C |
| Drift over Time | < 2% per year |
| Maximum Data Rate | 10 Hz |
| Minimum Warm-up Time | 2 s |
| 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 |
| Connector | MCBH-5-FS, wet-pluggable |
| Diameter | 2.5 cm (0.98 in.) |
| Height | 13.1 cm (5.15 in.) |
| Weight | 181.4 g (0.4 lb) |
-2.5 Output Option |
|
| Output Voltage | 0 to 2.5 V (over selected NTU range) |
| Supply Voltage | 5 to 15 Vdc |
| Current Drain | 15 mA |
-5 Output Option |
|
| Output Voltage | 0 to 5 V (over selected NTU range) |
| Supply Voltage | 5 to 15 Vdc |
| Current Drain | 15 mA |
-20 Output Option |
|
| Output Voltage | 4 to 20 mA (over selected NTU range) |
| Supply Voltage | 9 to 15 Vdc |
| Current Drain | 45 mA |
Documentos Relacionados
Lâminas do produto
Trabalhos técnicos
- OBS and Turbidity Sensors Basics (2Q-P)
- OBS: Effects of Light Absorption and Scattering in Water Samples on Measurements
- OBS Sensors: Light Sources and Photodetectors
- OBS: Effects of Suspended Solids Concentration (SSC)
- OBS Measurements: Effects of Sediment Size
- OBS Measurements: Effects of Sediment Color
- OBS Measurements: Effects of Water Color
- OBS: Effects of Bubbles
- OBS Sensor: Effects of Fouling on the Lens
- OBS Sensors: Sediment Calibration
- OBS Sensors: Turbidity Calibration
- OBS: Comparison of Suspended Solids Concentration (SSC) and Turbidity
Perguntas Frequentes Relacionadas
Number of FAQs related to OBS300: 16
Expandir todosRecolher todos
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Typically, users use a clamp (a hose clamp, for example) to fasten the sensor to a permanent structure in the water so that the optics are orientated toward the open water.
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Yes. The OBS300 is not harmed by being dry. The optics, however, need to be cleaned of any dust or contamination before the measurements are resumed.
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These devices employ optical backscatter to measure light absorption and should produce comparable data, but variation is likely between sensors.
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Sensors are calibrated at the factory for measurements up to 4,000 NTUs, if requested at the time of order. Sensor ranges cannot be adjusted outside the factory.
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The following are some suggestions:
- Keep the optics clean.
- Site-specific field calibration may be necessary for the best performance.
- Prevent the sensor from freezing.
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The accuracy is 0.5 NTU or 2% of reading.
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This has not been tested; however, it is likely that, as the sensor moves through the water, disturbances or bubbles are created that could distort the turbidity measurements.
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Campbell Scientific does not offer a display that can be attached directly to the sensor; however, the data logger used to capture and record the data may have a display.
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The OBS-3+ and the OBS300 are essentially the same sensor but with differing optic placement. The OBS-3+ has sideways-facing optics, whereas the OBS300 has downward-facing optics.
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The OBS-3+ or OBS300 provides two separate outputs to match the two turbidity ranges selected at the time of purchase. Use the curve that matches the turbidity range likely to be experienced during monitoring. Program the data logger to record and store data from each output, or choose which output to use automatically depending on the turbidity.