OBS501 Smart Turbidity Meter with Antifouling Features
Ideal for Fouling Environments
ClearSensor antifouling features, dual backscatter sensors
weather applications supported water applications supported energy applications supported gas flux and turbulence applications supported infrastructure applications supported soil applications supported

Overview

The OBS501 is a submersible turbidity probe with active antifouling capabilities for better measurements in biologically active water with both high and low turbidity. It outputs an SDI-12, digitally processed signal that many of our data loggers can measure. The OBS501 is similar to the OBS500, but the OBS501 has better mechanical performance in heavy sediment/sand conditions.

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Benefits and Features

  • Dual backscatter and sidescatter sensors used to measure turbidity
  • ClearSensor antifouling method for better measurements in biologically active water
  • Shutter/wiper mechanism keeps lenses clean
  • Refillable biocide chamber prevents fouling
  • Disposable plastic sleeve facilitates cleanup
  • Optional copper sleeve for additional protection (especially for sea water) or disposable plastic sleeve facilitates easy cleanup

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Specifications

Dual Probe 90° sidescatter and backscatter
Range 0 to 4000 NTU
Active and Passive Antifouling Shutter, wiper, biocide, copper, optional removable sleeve
Concentration Accuracy ±2% of reading or 0.5 NTU (whichever is greater)
Operating Temperature Range 0° to 40°C
Storage Temperature Range 0° to 40°C
Temperature Accuracy ±0.3°C
Emitter Wavelength 850 nm
Power Requirements 9.6 to 18 Vdc
Measurement Time < 10 s
Maximum Submersion Depth 100 m (330 ft)
Diameter 4.8 cm (1.88 in.)
Maximum Cable Length
  • 116 m (380 ft) for 1 channel SDI-12 or analog
  • 15 m (50 ft) for RS-232
Length 27 cm (10.63 in.)
Weight 0.59 kg (1.30 lb)

Power Consumption

Quiescent < 200 µA
Measurement < 40 mA
Communication < 40 mA
Active Shutter Motor < 380 mA

Outputs

SDI-12 Version 1.3, 1200 bps
RS-232 9600 bps, 8 data bits, 1 stop bit, no parity, no flow control
Analog 0 to 5 Vdc

Compatibility

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

Data Loggers

Compatible Note
21X (retired)
CR10 (retired)
CR1000
CR1000X
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR23X (retired)
CR295X (retired)
CR300
CR3000
CR310
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR6
CR800
CR850
CR9000 (retired)
CR9000X