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Sections: Common Accessories, Replacement Parts, Services
OBS-3+ Pricing Details
Educational Discounts: Yes    Quantity Discounts: Yes    Restockable: Yes    Warranty: 1 year   
Model Description
OBS-3+ Turbidity Sensor(Carrying Case Not Included)
Body Type Options (hide details)
-SB -SB Stainless Steel Body
An OBS-3+ turbidity sensor housed in this stainless-steel body can only be submerged in fresh water at a maximum depth of 500 m. If an OBS-3+ with a stainless steel body is submerged in salt water, the warranty will be void.
-TB -TB Titanium Body
An OBS-3+ turbidity sensor housed in this titanium body can be submerged in either fresh or salt water at a maximum depth of 1500 m.
Output Options (hide details)
-2.5 -2.5 0-2.5V Output
The -2.5 option supports our CR200(X)-series, CR510, or CR10(X) dataloggers. Both channels have an output range of 0 to 2.5 V.
-5 -5 0-5V Output
The -5 option supports our CR800, CR850, CR1000, CR3000, CR5000, and CR9000(X) dataloggers. Both channels have an output range of 0 to 5 V.
-20 -20 4-20mA Output
With the -20 option, the low channel has an output range of 4-20 mA, and the high channel has an output range of 0 to 5 V. A CURS100 is required for our dataloggers to read the 4-20 mA output.
Turbidity Range Options (hide details)
-T1 -T1 0-250 & 0-1000 NTUs
Measures the lower range of 0 to 250 NTUs or higher range of 0 to 1000 NTUs.
-T2 -T2 0-500 & 0-2000 NTUs
Measures the lower range of 0 to 500 NTUs or higher range of 0 to 2000 NTUs.
-T3 -T3 0-1000 & 0-4000 NTUs
Measures the lower range of 0 to 1000 NTUs or higher range of 0 to 4000 NTUs.
-T4 -T4 0-2000 & 0-4000 NTUs
Measures the lower range of 0 to 2000 NTUs or higher range of 0 to 4000 NTUs.
-T5 -T5 0-4000 & 0-4000 NTUs
Measures the range of 0 to 4000 NTUs on both channels. The -T5 option allows a channel with a 4-20 mA output (OBS-3+-20) to measure up to 4000 NTUs.
detail preferences (hide details)
Common Accessories
(hide details)
21098 OBS-3+ or OBS300 Carrying Case (Holds 2)
The 21098 provides a carrying case that holds two sensors.
21094 OBS-3+ or OBS300 Cable, 5m (16ft)
Campbell Scientific offers a choice of seven cables for attaching the OBS-3+ to the datalogger. The cables differ in their length. The 21094 provides a 5-m length.
21307 OBS-3+ or OBS300 Cable, 10m (32.8ft)
Campbell Scientific offers a choice of seven cables for attaching the OBS-3+ to the datalogger. The cables differ in their length. The 21307 provides a 10-m length.
21308 OBS-3+ or OBS300 Cable, 15m (49.2ft)
Campbell Scientific offers a choice of seven cables for attaching the OBS-3+ to the datalogger. The cables differ in their length. The 21308 provides a 15-m length.
21309 OBS-3+ or OBS300 Cable, 20m (65.6ft)
Campbell Scientific offers a choice of seven cables for attaching the OBS-3+ to the datalogger. The cables differ in their length. The 21309 provides a 20-m length.
21310 OBS-3+ or OBS300 Cable, 25m (82ft)
Campbell Scientific offers a choice of seven cables for attaching the OBS-3+ to the datalogger. The cables differ in their length. The 21310 provides a 25-m length.
21311 OBS-3+ or OBS300 Cable, 30m (98.4ft)
Campbell Scientific offers a choice of seven cables for attaching the OBS-3+ to the datalogger. The cables differ in their length. The 21311 provides a 30-m length.
OBS-3+CBL-L OBS-3+ or OBS300 Sensor Cable
Campbell Scientific offers a choice of seven cables for attaching the OBS-3+ to the datalogger. The cables differ in their length. The OBS-3+CBL-L has a user-specified length; lengths between 31 and 1000 meters can be ordered. A user-specified cable length takes more time to manufacture. The delivery time of the OBS-3+CBL-L is four to six weeks.
Cable Length (hide details)
-L m per sensor cable
Campbell Scientific offers a choice of seven cables for attaching the OBS-3+ to the datalogger. The cables differ in their length. The OBS-3+CBL-L has a user-specified length; lengths between 31 and 1000 meters can be ordered. A user-specified cable length takes more time to manufacture. The delivery time of the OBS-3+CBL-L is four to six weeks.
CURS100 100 Ohm Current Shunt Terminal Input Module
The CURS100 is required for our dataloggers to read the 4-20 mA output.
HYDRO-WIPER-C OBS-3+ Battery Powered Mechanical Wiper, 1M (3ft) Cable
This battery-powered wiper helps ensure accurate measurements by preventing algae and other fouling from covering the probe's lens. The HYDRO-WIPER-C includes an integrated timer for turning the wiper on and off. Cable length is 1 meter.
HYDRO-WIPER-D OBS-3+ 12Vdc Datalogger Controlled, Mechanical Wiper, 5M (16ft) Cable
The HYDRO-WIPER-D uses the datalogger's power supply, has a 5-m cable, and is controlled by the datalogger. The datalogger typically activates the wiper to remove algae and other fouling before each measurement.
HYDRO-WIPER-D-L OBS-3+ 12Vdc Datalogger Controlled, Mechanical Wiper
The Hydro-Wiper-D-L is essentially the same wiper as the HYDRO-WIPER-D, except it has a user-specified cable length. A user-specified cable length takes more time to manufacture. The delivery time for the Hydro-Wiper-D-L is four to six weeks.
Cable Length (hide details)
-L m cable per wiper
The Hydro-Wiper-D-L is essentially the same wiper as the HYDRO-WIPER-D, except it has a user-specified cable length. A user-specified cable length takes more time to manufacture. The delivery time for the Hydro-Wiper-D-L is four to six weeks.
20915 OBS Sensor 5-Point Sedimentation Calibration (User Must send in Sediment Sample)
Campbell Scientific will perform a 5-point sedimentation calibration for an OBS-3+ turbidity sensor. The customer must send Campbell Scientific a dry sample of sediment from the water that will be monitored.
Replacement Parts
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20986 O-Ring .676 ID .07 Wide Nitrile 2-017
This o-ring comes attached to the OBS-3+ Turbidity Sensor. The 20986 may be purchased to replace a lost or damaged o-ring.
Services
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20914 OBS-3+/OBS-3A 3-Point Turbidity Recalibration w/Documentation
When the 20914 is ordered, Campbell Scientific will perform a 3-point turbidity recalibration on the OBS-3+ sensor. All factory recalibrations require an RMA (Returned Material Authorization).
20915 OBS Sensor 5-Point Sedimentation Calibration (User Must send in Sediment Sample)
When the 20915 is ordered, Campbell Scientific will perform a 5-point sedimentation calibration for an OBS-3+ turbidity sensor. The customer must send Campbell Scientific a dry sample of sediment from the water that will be monitored.