When placed into soil, the HUM1100 measures the moisture levels by monitoring the capacitance between its prongs. It outputs a number between 0.0 and 1.0 depending on the moisture of the soil. This sensor is useful for automated gardening projects and environmental research.

This Phidget connects to your computer through a VINT Hub.

Calibration

Generally, the HUM1100 will output values as follows:

• 0.0 to 0.2 - Dry soil
• 0.2 to 0.5 - Moist soil
• 0.5 to 1.0 - Flooded soil

However, the type of soil being monitored can impact these values and each HUM1100 will have a slightly different response so it is important to test for yourself to determine which value corresponds to your desired soil conditions.