XBee 6.3mW Wire Antenna - Series 2C ZigBee Mesh

A Module with GPRS Antenna, operation Wireless and SIM Card.

This is an Arduino-Compatible B25 Voltage Sensor Module.

Voltage Sensor Module.

Kit Thermostat with LED Indicator - Velleman.

SW-420 Motion and Vibration Sensor Module.

SparkFun OpenScale

SparkFun OpenLog

The Earth Unit is a Sensor for measuring Humidity in Soil or Similar Materials. The Soil Moisture Sensor is quite simple to use. The two large stake-type sensors act as probes for the sensor, acting together as a variable resistance. The higher the moisture in the soil, the better the conductivity between the two, so that the sensor results in less resistance and higher GIS output.

You can read the moisture in the soil through ADC. Within this unit, there is an extra potentiometer to change the measurement range.

This package includes a Sensor of Level of Water and a Sensor of Humidity from Solo. If the plates have water covering the sensor components, an analog value will be available on the "SIG" connection. The Sensor of Level of Water can detect up to 4cm of water. This way, you can check if your aquarium, or your pet's water bowl, still has enough water. You can use the Sensor of Moisture of the Soil to check your plant's soil or growing environment, for example.