Wireless temperature, humidity and atmospheric pressure loggers are used for indoor measurements, among others in warehouses, hospitals, museums or airports.

Efento sensors transmit the data over cellular network (Narrowband IoT and LTE-M) 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 / LTE-M sensors can be integrated with any cloud platform.

TEMPERATURE SENSOR
Range: -35° to 70°C
Accuracy up to 0.25°C in the -20°C to +70°C range and 0.5°C in the -35°C to -20°C range
Resolution: 0.1°C
Drift: -0.1°C / year
Measurement interval: 1 minute to 10 days, configurable
Memory size: 60 000 measurements

HUMIDITY SENSOR
Range: 0 to 99% RH
Accuracy: 4% in 0 to 80% RH, 7% in 81 to 99% RH
Resolution: 1%
Drift: -0.25% / year
Measurement interval: 1 minute to 10 days, configurable
Memory size: 60 000 measurements

PRESSURE SENSOR
Range: 300 to 1100 hPa
Accuracy: absolute +/- 3 hPa in temeprature 0 to 65°C, relative +/- 0,12 hPa in temperature 0 to 65°C, p = 800-900 hPa
Resolution: 1 hPa
Measurement interval: 1 minute to 10 days, configurable
Memory size: 60 000 measurements

LTE band (FDD)
LTE band (FDD): 8, 20, devices working on other bands available on request
3GPP: Release 13 (LTE-Cat M1)
Power: 23 dBm (LTE-M NB-IoT)

BLUETOOTH LE
Radio module frequency: 2,4 GHz
Power: 2,5 mW (4 dBm)
Range: up to 100 m (LOS)
Transmision period: 1 s

COMMUNICATION
Protocol: CoAP; Trasnsmission interval: 5 minutes – 10 days, configurable

SOFTWARE UPDATES
Over the air (with delta mechanism); Over Bluetooth Low Energy

BATTERY
Battery: 2 x AA 3,6 V, capacity 4 200 mAh (replaceable)
Battery operating time: up to 10 years

DIMENSIONS
27 x 71 x 71 mm
Weight: 100 g