NB-IoT
4-20 mA sensor interface
Efento 4-20 mA sensor interface allows users to connect analog sensors to the cloud. Device can be equipped with analog interfaces (2 x 4-20 mA). Sensors can be powered either from the device’s battery or by an external power source. Data from the analog sensors can be presented as current (4-20 mA) or converted to other measurement types once it reaches the Efento Cloud platform.
Efento NB-IoT devices transmit the data over cellular network (Narrowband IoT) and do not require any additional devices (router, gateway, etc.). Devices are also equipped with Bluetooth Low Energy interface, which allows quick and easy configuration with a smartphone. Efento devices can be integrated with any cloud platform.
- Battery ensures up to 5 years of maintenance-free operation
- NB-IoT sensors send the data over the cellular network to Efento Cloud or any other cloud platform.
- Measurement period: 1 minute – 10 days (configurable by the user)
- User configurable alarm thresholds. If any of the thresholds is exceeded, sensor will send the data to the platform immediately
- The device stores 40,000 measurements in its memory, when the memory is full, the oldest measurements are overwritten
- Sensor's configuration can be changed remotely from the cloud or with a mobile application over Bluetooth Low Energy
Key features
Efento Cloud
Together with Efento Cloud, the sensors enable constant monitoring, alerting about exceeding safe limits, generating reports and analyzes.
Long battery life
Loggers have been designed to work for up to 10 years on batteries. You do not have to remember about changing the batteries frequently or troublesome batteries charging.
Lower costs
Choosing wireless sensors and a cloud platform reduces the installation and maintenance costs.
Wide range of sensors
Efento sensors can measure various physical and chemical values. If you decide on one sensor today, you can expand your sensors fleet to another types anytime you want.
Integration
Standard communication protocols allow integration with any cloud platform or mobile application.
Easy set up
All you need to set up a logger is a smartphone with a free mobile application. The whole configuration takes no more than 15 minutes.4-20 mA interface
Analog input allows users to connect external 4-20 mA sensors. External sensors can be powered by the device or by external power supplyEdge analytics
Devices analyse the data and send it to cloud platform when needed. This allows to decrease the number of cellular transmissions and increase the battery lifetime. There are several types of analyses that can be performed by the sensor: from a simple comparison of the measured value to the threshold to more complex mathematical operations.Software over the air update (SOTA)
The sensors are equipped with over the air software update mechanism, thanks to which, your fleet of sensors will always have the latest version of software. Moreover, SOTA is based on delta mechanism and only the difference between the current and the new version of the software is sent to the device. This saves both the battery and data transfer.
Full remote configuration
All the settings of the NB-IoT sensors can be changed remotely in a secure way. This allows you to easily reconfigure thousands of the deployed devices, no matter how far they are located.Integration
We believe that the Internet of Things is about integrating data sources, analysing the data and drawing conclusions based on it. If you want to integrate Efento loggers with your software, cloud platform or mobile application, we will provide you with the necessary documentation, libraries, SDKs and we will gladly assist you.
| UP TO 2 CHANNELS | Simultaneous operation with up to 2 external sensors: 2 x 4-20 mA Accuracy: 0.1% with factory default calibration, 0.01% with user 4 points calibration |
|---|---|
| NB-IoT | NB-IoT bands: 3GPP: Release 13 Power: 23 dBm ±2 dB |
| BLUETOOTH LE | Communication: Bluetooth Low Energy (BLE) 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; Transmission interval: 5 minutes – 10 days, configurable |
| SOFTWARE UPDATES | Over the air (with delta mechanism); Over Bluetooth Low Energy |
| POWER SUPPLY | Package of 3 x AA, 6300 mAh (replaceable) |
| DIMENSIONS | 124x60x26 mm Weight: 0,13 kg |
Case studies
Implementation of Efento Cloud temperature and humidity monitoring system
Hospital pharmacy uses Efento Cloud for monitoring temperature and humidity in refrigerators and rooms where medical products are stored.
Archives of the Jagiellonian University
The Archives of the Jagiellonian University are one of the oldest and largest university archives in the world. Efento loggers measure temperature and humidity, ensuring control over the proper storage conditions of exhibits.
NOT SURE YET?
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Check it yourself. The starter kit includes all you need to test Efento wireless sensors and Efento Cloud platform:
- NB-IoT temperature and humidity sensor
- Efento Cloud access
- Free shipping worldwide
Our customers
Newsletter December 2025
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