In September 2012, we updated the Conductivity probe with a new calibration on each switch setting to optimize it for small improvements in the hardware.
Pre-Sept 2012 Calibration values:
Low Setting = 65.7 uS/cm
Middle Setting = 847.2 uS/cm
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Vernier ethanol sensors work well between 0% and 3% ethanol. The standard calibration will give good change over time data, but for quantitative data, calibration will increase the accuracy of the readings near the top end of the range. ...
All Vernier ethanol sensors need to warm up for 5 minutes before use. On first use, the ethanol sensor may need more than 5 minutes to warm up.
If the sensor is slow to warm up or respond you can do the following:
1 Expose the sensor to a dilu...
All Vernier ethanol sensors will never give a reading of 0 in air because of the type of calibration formula that is used.
The minimum reading will typically fall within the following range:
Unit
% 0.007 - 0.010
ppt 0.07 - 0.100
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The accuracy is ±2% of reading or ±3°C, whichever is greater @ 18 to 28°C ambient operating temperature.
For the full specifications, see:
Specifications and User Guide...
If your CO2 Gas Sensor no longer auto-IDs and is still under its 5-year warranty, you can return it to Vernier for inspection (see below). If it is a mechanical problem, it will be fixed at no charge under the warranty. If, however, it is determined ...
We haven't sold the Student Radiation Monitors for several years. Although we are often able to repair sensors outside of their 5-year warranty, we no longer have the parts to complete this repair.
If you are interested in replacing your radiation...
Yes. Traditionally, a solution of sodium sulfite is used as the zero-oxygen calibration solution but this is NOT recommended for the Optical DO Probe. A zero-oxygen calibration solution can be created by bubbling nitrogen gas into distilled water.
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No. The Optical DO Probe is not affected by the presence of hydrogen sulfide and other gasses that interfere with the traditional electrochemical method. ...
First, we need to determine if there really is mold inside the shaft of the sensor--it might be a precipitate rather than mold. To test this, place the sensor in ~150 mL of warm water and let it sit in the warm water for 15-20 minutes. If the amount ...