Wireless soil moisture logger is used to measure the amount of water in the soil. The sensor measures soil moisture levels and notifies of a sharp decrease or increase in the amount of water in the soil. The devices are powered by a battery that ensures their maintenance-free operation for a period of at least ten years. 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.

Efento NB-IoT sensors transmit the data over cellular network (Narrowband IoT) and do not require any additional devices (router, gateway, etc.). Sensors are also equipped with Bluetooth Low Energy interface, which allows quick and easy configuration with a smartphone. Efento NB-IoT sensors can be integrated with any cloud platform.
You can use a free mobile application to configure the device and read the data from its memory.

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