Description
Wireless temperature, humidity and atmospheric pressure loggers are used for indoor measurements, among others in warehouses, hospitals, museums or airports. As an option, it is also possible to measure CO2 or VOC (in IAQ units).
They NB-IoT 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 | internal |
| Temperature range (°C) | -15 to 70 | -15 to 70 | -15 to 70 |
| Temperature accuracy (°C) | 0.4 | 0.4 | 0.4 |
| Temperature resolution (°C) | 0.1 | ||
| Drift | 0.1 °C/year | ||
| Humidity range (%HR) | 0 to 99 | 0 to 99 | 0 to 99 |
| Humidity accuracy (%HR) | 4 | 4 | 4 |
| Humidity resolution (HR%) | 1 | 1 | 1 |
| Drift | 0.25 % HR/ year | 0.25 % HR/ year | 0.25 % HR/ year |
| Pressure range (hPa) | 300 to 1100 | 300 to 1100 | 300 to 1100 |
| Pressure accuracy (hPa) | in absolute P +/- 3 hPa from 0 to 65°C, in relative P +/- 0.12 hPa from 0 to 65°C | in absolute P +/- 3 hPa from 0 to 65°C, in relative P +/- 0.12 hPa from 0 to 65°C | in absolute P +/- 3 hPa from 0 to 65°C, in relative P +/- 0.12 hPa from 0 to 65°C |
| Pressure resolution (hPa) | 0.1 | ||
| Air quality | not available | 0 to 500 IAQ | not available |
| Gamme de CO2 (ppm) | not available | not available | 400 to 5000 |
| CO2 accuracy | not available | not available | ±(40 ppm + 5 % of reading) |
| Measuring interval | 1 minute to 10 days, configurable | ||
| Memory | 40,000 values for each parameter | ||
| 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 | ||
| Dimension | 124x60x26 mm | 124x60x26 mm | 124x60x26 mm |
| Weight | 0.13 kg | 0.17 | 0.2 kg |
