Moisture sensors are devices designed to measure the amount of water present in soil or other materials. They work by detecting the electrical conductivity or capacitance changes that occur when moisture levels vary. These sensors are commonly used in agriculture, gardening, and environmental monitoring to ensure optimal moisture levels for plant growth. There are various types of moisture sensors, including resistive and capacitive sensors. Resistive sensors measure moisture by passing an electrical current through the soil, while capacitive sensors use an electric field to determine moisture content. Both types help users make informed decisions about irrigation and water management.