Moisture sensors are devices that measure the amount of water present in soil or other materials. They help gardeners, farmers, and researchers monitor moisture levels to ensure plants receive the right amount of water. By providing real-time data, these sensors can prevent overwatering or underwatering, promoting healthier plant growth. These sensors come in various types, including capacitive and resistive sensors. Capacitive sensors measure changes in electrical capacitance caused by moisture, while resistive sensors measure the electrical resistance of the soil. Both types are valuable tools for anyone looking to optimize irrigation and maintain healthy ecosystems.