Decagon's Soil Moisture Probes are calibrated for about 4% VWC accuracy in most soil types. For up to 1% VWC accuracy, follow these steps for a custom calibration.
If you have any questions visit our soil moisture forum to post questions, read answers to frequently asked questions, and receive answers to your questions from Decagon scientists and other users. Feel free to call Decagon directly at 1-800-755-2751 to speak to a researcher directly.
Or, you can find out more about individual sensors by visiting their product pages.