Special caution should be taken when operating at greater than ±20 volts in a situation where significant current can be supplied. Many solar panel projects require measurement of more than 10 volts and this concept is often useful for these proj...

Both sensors support Bluetooth® low energy technology if they came with a Polar Heart Rate Module. Using Bluetooth® for data collection is very stable and is done at lower sampling rates. This is the best method for collecting heart rate data. The...

The Tris-Compatible Flat pH Sensor (FPH-BTA) is more durable than the regular pH sensor, but it still needs to be handled with some care. Both sensors have glass parts that can be broken. The regular pH sensor has a hand blown globe-shaped tip, and ...

This sensor is no longer available. Information is presented for reference only. Vernier Optical DO Probe (ODO-BTA) Specifications and User Guide Troubleshooting Primary Test: Connect the Vernier Optical DO Probe to th...

For most dissolved oxygen testing, it is not necessary to compensate for salinity. The salinity of a sample can have an affect on the dissolved oxygen (DO) concentration in highly saline water (>1 part per thousand salinity). In this case an adjus...

This information relates to connecting a Hand Dynamometer (HD-BTA) to an NI-ELVIS interface. In some situations, the signal may be noisy. To fix this, simply place a resistor in series with the output signal of the sensor. The resistor can be somewh...

This information pertains to LabQuest 2. If you have LabQuest 3, see this article. If you have an original LabQuest, see this article. LabQuest 2 ⚊version 2.9.2 (January 15, 2026) Resolved Issue Addressed an issue where the LabQuest App ...

When testing a pH Sensor (pH Sensor (PH-BTA), Tris-Compatible Flat pH Sensor (FPH-BTA), Go Direct® pH Sensor (GDX-PH)), it is best to place it into a known buffer solution. This allows you to see if the sensor is reading correctly (e.g., in a bu...

This sensor is no longer available. Information is presented for reference only. Dissolved Oxygen Probe (DO-BTA) Specifications and User Guide Troubleshooting Primary Test: If the probe is filled with the correct filli...

The Vernier Dynamics System (VDS, discontinued) and Mass for Dynamics Cart (MASS) each include a mass with the correct hardware for attachment to a Vernier cart. Here is a photo showing how the included long hex nut bolt is used to attach an accel...