There is a known limitation of the LabPro interface such that data from the photogate will not display until the experiment ends. As a result, you must not click stop before data collection ends on its own. If you click Stop during data collection, ...

Because pH calibrations will drift over time, periodically creating a new custom calibration provides more accurate readings. Vernier pH sensors have the ability to create a custom calibration and store it in the sensor's memory. By default, this sto...

NOTE: The 3rd-party electrode must have a BNC connector at the end of its cable to connect it to the Electrode Amplifier. Also, you'll need to prepare two standard solutions of known concentrations to calibrate your electrode. The company that sold t...

The ideal test solution for an ORP electrode is a commercially-produced standard. Many companies sell ORP standards: Hach, Cole Parmer, and Hanna are three examples. You can also prepare you own test solution. Here are the recipes for two: Light's S...

In 2011, the manufacturer of the turbidity standards added a plastic label to outside of their bottles. When you try to remove one of these bottles from the Turbidity Sensor, the edge of this label can catch, making it difficult to pull out. The solu...

In our own tests, the accuracy of the 30-Volt Voltage Probe is +/- 0.2V. The resolution is 15 mV. ...

Absorbance is a unitless measure of the amount of light of a particular wavelength that passes through a volume of liquid, relative to the maximum possible amount of light available at that wavelength. Absorbance readings are unitless because the...

The useful life of Vernier oxygen gas sensors is dependent on how they are stored and how much oxygen they are exposed to over a given period of time. Storing the sensor correctly and reducing the exposure to oxygen will extend the sensor's life. To...

The anemometer consists of an impeller that contains a magnet, and there is a magnetic field sensor just below the impeller that reads how often the magnetic field changes. This is then calibrated to read the correct wind speed. Since it is a mag...

This information pertains to LabQuest 2. If you have a LabQuest 3, see this article. If you have an original LabQuest, see this article. To verify that a LabQuest 2 is charging, connect the unit to AC power, turn the unit on and look at the icon i...