Vernier Software and Technology
Vernier Software & Technology
Tech Info Library

Turbidity Sensor Troubleshooting and FAQs

Turbidity Sensor, order code TRB-BTA, $112
Specifications and User Guide

TROUBLESHOOTING
-Primary: Connect the sensor to the Vernier interface and run the data-collection program. Fill the sample bottle to the top of the line on the bottle with the water to be tested. Gently invert the bottle to mix, but do not shake the bottle. Seal the bottle with the lid and wipe the outside of the bottle with a clean, lint-free cloth or tissue. Hold the bottle by the lid and place it in the sensor, making sure to line up the markings on the bottle and the sensor. Close the lid and monitor the turbidity values.
NOTE: Particles in the water will settle over time and show a slow downward drift in turbidity readings; therefore, take your readings soon after placing the cuvette in the sensor.

RELATED TIL ENTRIES
-TIL 658: Where can I get replacement Turbidity bottles (cuvettes) or standards?
-TIL 673: Why don‘t ChemBio, Physics, and PhySci work properly with my autoID Sensors?
-TIL 823: Why does my Turbidity Sensor give me negative readings?
-TIL 1025: Can the turbidity cuvettes be autoclaved?
-TIL 1121: My turbidity cuvette has no line to guide the volume added.
-TIL 2469: My turbidity standard bottle is stuck in the Turbidity Sensor. How do I get it out?
-TIL 4035: Is it possible to measure turbidity with the colorimeter?

SPECIFICATIONS
Range: 0 to 200 NTU
Resolution:
13-bit (SensorDAQ) 0.13 NTU
12-bit (LabQuest 2, LabQuest, LabQuest Mini, LabPro, TI Inspire) 0.25 NTU
10-bit (CBL 2) 1 NTU
Accuracy: +/- 2 NTU for readings under 25 NTU; +/- 5% for readings above 25 NTU
LED wavelength: 890 nm
Standard: StablCal Formazin Standard 100 NTU

CALIBRATION
-Calibrate? Yes. Connect the Turbidity Sensor to a interface and allow the sensor to warm up for five minutes. Run the data-collection program and enter the calibration section of the program. See TIL 2341: How do I calibrate a sensor in Logger Pro? for help with this.

1st calibration point (Turbidity Standard): gently invert the bottle containing the turbidity standard solution (100 NTU) four times. NOTE: Do not shake the bottle. Wipe the outside of the bottle with a clean, lint-free cloth or tissure. Hold the bottle by the lid and place it in the sensor, aligning the markings on the bottle with the markings inside the sensor. Close the lid. When the reading stabilizes, enter "100" as the value in NTU. Remove the standard. 2nd calibration point: Prepare a blank by rinsing and filling the empty sample bottle with distilled water to the top of the line on the bottle. Seal the bottle with the lid. Wipe the outside of the bottle with a clean, lint-free cloth or tissure. Hold the bottle by the lid and place it in the sensor, aligning the markings on the bottle with the markings inside the sensor. Close the lid. When the reading stabilizes, enter "0" as the value in NTU.

To save this calibration to your sensor, see: TIL 2342: How do I store the calibration for my sensor using Logger Pro?

RELATED VERNIER PRODUCTS
-Turbidity Accessories Replacement Kit, order code TRB-ACC, $39

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