OBS300

Turbidity Sensor
OBS300

OBS300

RetiredConfigurable

Turbidity Sensor

Compact, low-power, downward-looking turbidity sensor.

Pricing

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Model:
OBS300
Item Number:
26475
Warranty:
1 year
Lead time:
14 days

Overview

OBS300 TURBIDITY SENSOR

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.

Key Advantages

Accurate, Rugged
Optics avoid obstructions on sides of probe

Technical Description

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.)

Benefits

  • 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)

Specifications

Range
0 to 250 NTU
Range
0 to 500 NTU
Range
0 to 1000 NTU
Range
0 to 3000 NTU
Range
0 to 4000 NTU
Maximum Submersion Depth
500 m

(1640.5 ft) for stainless-steel body

Maximum Submersion Depth
1500 m

(4921.5 ft ) for titanium body

Maximum Concentration Range
Maximum concentration depends on sediment size, particle shape, and reflectivity.
Maximum Concentration Range
5,000 to 10,000 mg/l

(for mud)

Maximum Concentration Range
50,000 to 100,000 mg/l

(for sand)

Concentration Accuracy
2% of reading or 1 mg/l

(whichever is larger) for mud

Concentration Accuracy
4% of reading or 10 mg/l

(whichever is larger) for sand

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

Related Resources

Case Studies

Documents

Connect With Us

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Phone Numbers
General: (435) 227-9000
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Corporate Address
815 W 1800 N
Logan, UT 84321
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Email Address
sales@campbellsci.com

As a trusted leader in measurement systems for more than 50 years, our top priority at Campbell Scientific has always been to provide the most accurate, reliable data for research and industry.