This product measures soil moisture levels by capacitive sensing, rather than resistive sensing like other types of moisture sensor. It is made of a corrosion resistant material giving it a long service life. Insert it into soil and impress your friends with the real-time soil moisture data!

The following image shows an example project - a device that notifies you when a plant needs to be watered.

This is a photoelectric water liquid level sensor that is operates using optical principles. The advantages of this are good sensitivity and no need for mechanical parts - meaning less calibration! The corrosion resistant probe is easily mounted and can handle high temperature and high pressure. The sensor is equipped with an interface adapter for compatibility with the DFRobot "Gravity" interface.

The turbidity sensor detects water quality by measuring level of turbidity. It is able to detect suspended particles in water by measuring the light transmittance and scattering rate which changes with the amount of total suspended solids (TSS) in water. As the TTS increases, the liquid turbidity level increases.

Turbidity sensors can be used in measurement of water quality in rivers and streams, wastewater and effluent measurements, sediment transport research and laboratory measurements.

This immersible pump can be used to water your plants, make a fountain or waterfall, even change your fish tank wter.It works quietly with the sound level under 30db.

Note: This pump is intended for use UNDER the water ONLY!

The Gravity Water Flow sensor measures the rate of a liquid flowing through it.

The Gravity interface make it be compatible with Arduino IO Expansion Shield.