Campbell Scientific OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors - Manual (Page 18)

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors
6. Specifications
Features:
• Measures suspended solids and turbidity for up to 4000 NTU
• Provides a compact, low-power probe that is field proven
• Stainless-steel body allows use down to 500 m in fresh water
• Titanium body allows use down to 1500 m in fresh or salt water
• Fitted with MCBH-5-FS, wet-pluggable connector—multiple mating
cable length options available
• Accurate and rugged
• Compatible with Campbell Scientific CRBasic dataloggers:
CR200(X) series, CR800 series, CR1000, CR3000, CR5000, and
CR9000(X). Also compatible with Edlog dataloggers: CR500,
CR510, CR10(X), CR23X, 21X, and CR7
Operating Temperature: 0° to 40°C
Sensor may be damaged if it is encased in frozen liquid.
Ranges
Turbidity (low/high): 250/1000 NTU; 500/2000 NTU; 1000/4000 NTU
Mud 1 : 5000 to 10,000 mg L –1
Sand 1 : 50,000 to 100,000 mg L –1
1 Range depends on sediment size, particle shape, and reflectivity.
Accuracy
Turbidity 2 : 2% of reading or 0.5 NTU
Mud 2 : 2% of reading or 1 mg L –1
Sand 2 : 4% of reading or 10 mg L –1
2 Whichever is larger.
Power
Voltage output: 5 to 15 Vdc/15 mA (Volts outputs)
4-20 mA transmitter: 9 to 15 Vdc/45 mA max. (4 to 20 mA output)
Operating wave length: 850 ± 5 nm
Optical power: 2000 µW
Drift: <2% per year
Daylight rejection: –28 dB (re:48 mW cm –2 )
Maximum data rate: 10 Hz
Maximum depth
Stainless steel body: 500 m (1640.5 ft)
Titanium body: 1500 m (4921.5 ft)
Weight: 181.4 g (0.4 lb)
Dimensions: (see below)
CAUTION
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