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This product has limited availability. Some accessories, replacement parts, or services may still be available when it is no longer available.
OBS-3+
 
OBS-3+ Turbidity Sensor(Carrying Case Not Included)
 
Body Type Options - show 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.
Output Options - show 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 - show 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.

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Product Details
Restockable Yes
Warranty 1 year
Compliance CE Compliance Image
Ships With
(1) Calibration Certificate

Common Accessories

 
The 21098 provides a carrying case that holds two sensors.
 
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.
 
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.
 
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.
 
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.
 
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 305 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 - show details
-L m per sensor cable

Allowed values: 31-305 m, increments of 1 m

CURS100
 
The CURS100 is required for our dataloggers to read the 4-20 mA output.
HYDRO-WIPER-C
 
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
 
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 - show details
-L m cable per wiper

Allowed values: 1-1000 m, increments of 1 m

Replacement Parts

 
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

 
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).