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What are the A,B,C… or number markings on the side of the soil moisture sensor probe?

April 26, 2017Markings moisture probe sensor soil

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What are the A,B,C… or number markings on the side of the soil moisture sensor probe?

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These serve as calibration markings. Under some applications, it is desirable to only place the probe partially into the soil. For example, if the probe isn’t fully buried, depending upon how far it is inserted will change the output readings of the probe. If it is inserted half way it will deliver half the rated output voltage. These markings can also be used for calibrating water level measurements.