The moisture sensor (FC-28) is used to measure conductivity/moisture content.

Moisture/water conducts electricity, which is measured by the electrodes.

Examples:

1. Soil Moisture Monitor: sensor detects moisture in the soil to alert when it needs watering.
2. Hydration Meter: sensor detects conductivity of urine to determine if a person is adequately hydrated.
3. Water Salinity Tester: sensor measures the salinity (salt content) of a water sample.
4. Compost progress: sensor detects presence of leachate which degrades quality of compost.
5. Water leakage detector: sensor detects when water leaks from a tank or container.

Units:

• Voltage: V

  As conductivity is measured as a voltage value.

Pin:

• A0 pin, the port named "Moisture Sensor" on the SNT Kit PCB.

Wire:

• 2 pin connecting wires
• 4 pin connecting wires