Wireless soil moisture logger is used to measure the amount of water in the soil. The sensor work with the Efento mobile application for Android and allow, among others registering soil moisture and temperature, notifications of a sharp decrease or increase in the amount of water in the soil, and generating automatic reports. The devices are powered by a battery that ensures their maintenance-free operation for a period of at least two years. Sensors communicate with smartphones using Bluetooth Low Energy technology. The maximum range of the sensor is approx. 100 m in an open space. The sensors record 40,000 measurements in their memory. The device comes in IP67 enclosure that protests it against the damage caused by water and dust. The logger is equipped with an external Watermark soil moisture probe 3 m long and a temperature probe – 3 m.


TEMPERATURE SENSOR
Range: -55 to +125°C
Accuracy: up to 0.5°C in the range from -10°C to +85°C and up to 2°C in the range -55 to -125°C
Resolution: 0.1°C
Drift: -0.1°C / year Measurement interval: 1 minute to 10 days, configurable
Memory size: 60 000 measurements

MOISTURE SENSOR
Measurement range: 0 – 200 cb (kPa)
Measurement period: configurable from 1 minute to 10 days

PROBES
The sensor is equipped with an external Watermark soil moisture probe 3 m long and a temperature probe – 3 m. The temperature probe is used to correct the results depending on the soil temperature. It should be located near the soil moisture probe (0.1 – 1m)

RADIO MODULE
Communication: Bluetooth Low Energy (BLE)
Radio frequency: 2,4 GHz
Power: 2,5 mW (4 dBm)
Range: up to 100 m (LOS)
Communication standard: Bluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0)
Transmission frequency: 1 s

BATTERY
Battery: 3,6 V, size AA, capacity 2 700 mAh (replaceable)
Battery operating time: at least 5 years (measurement interval: 15 min)

DIMENSIONS
27 x 71 x 71 mm
Weight: 80 g