Description
NB-IoT temperature and humidity loggers transmit data over a cellular network (Narrowband IoT) and do not require any additional devices (router, gateway, etc.). The sensors are also equipped with a Bluetooth Low Energy interface, which allows quick and easy configuration with a smartphone. Efento NB-IoT sensors can be integrated into any cloud platform.
The devices analyze the data and send it to the cloud platform when needed. This reduces the number of cellular transmissions and increases battery life. Several types of analyzes can be performed by the sensor: from the simple comparison of the measured value to the threshold to more complex mathematical operations.
All parameters of NB-IoT sensors can be modified remotely in a secure manner. This allows you to easily reconfigure thousands of deployed devices, regardless of their distance.
If you want to integrate NB-IOT loggers with your software, cloud platform or mobile application, we will provide you with the necessary documentation, libraries, SDKs and we will be happy to help you.
Each NB-IOT sensor can be supplied with a calibration certificate in accordance with ISO/IEC 17025. The test is carried out in an external ILAC certified laboratory.
Technical data
| Model | 1 | 2 | 3 |
| Sensor type | internal | internal + 1 external temperature | external |
| Temperature range (°C) | -15 to 70 | -15 à 70 and -55° to 125°C (external) | -40 to +125 |
| Temperature accuracy (°C) | 0.4 | 0.4 and 0.5 (external) | 0,4 in the range -40°C to +85°C and 0.8 °C outside this range |
| Temperarure resolution (°C) | 0.1 | ||
| Drift | 0.1 °C/year | ||
| Humidity range (%RH) | 0 to 99 | 0 to 99 | 0 to 99 |
| Humidity accuracy (%RH) | 4 | 4 | 3 % in the range 0-90 % |
| Humidity resolution (RH%) | 1 | 1 | 1 |
| Drift | 0.25 % HR/ year | 0.25 % HR/ year | 0.25 % HR/ year |
| Measurement interval | 1 minute to 10 days, configurable | ||
| memory | 40 000 temperature values + 40 000 humidity values | ||
| NB.IOT | B8 and B20, on request: B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B66, 3GPP: Release 13, Power : 23 dBm ±2 dB | ||
| Bluetooth LE | Radio module frequency: 2.4 GHz, Range: up to 100 m (LOS), Power: 2.5 mW (4 dBm), transmission period: 1 s | ||
| Communication | Protocol: CoAP; Transmission interval: 5 minutes – 10 days, configurable | ||
| Firmware update | By air (with delta mechanism); On Bluetooth Low Energy | ||
| Power supply | 3 x AA batteries, 6300 mAh (replaceable), Battery life: up to 5 years, 5V USB with 1000 mAh rechargeable battery | ||
| Dimensions | 124x60x26 mm | 124x60x26 mm | 124x60x26 mm |
| Weight | 0.13 kg | 0.17 | 0.2 kg |
