NB-IoT

Wireless illuminance logger

Wireless illuminance logger is a lux meter, measuring the intensity of light as visible by the human eye. The precision spectral response and strong IR rejection of the device enables it to accurately meter the intensity of light as seen by the human eye regardless of light source.

Efento NB-IoT loggers 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. 

  • Measurements: 0.01 lux to 83 000 lux
  • Measurement period: 1 minute – 10 days (configurable by the user)
  • The device stores 40,000 measurements in its memory, when the memory is full, the oldest measurements are overwritten
  • Battery ensures up to 5 years of maintenance-free operation
  • Use a free mobile application to configure the logger, read the data from its memory, generate reports and set alert thresholds
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Wireless Illuminance logger NB-IoT
Wireless Illuminance logger NB-IoT

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.
Calibration certificate
At the customer’s request, each Efento sensor can be supplied with a calibration certificate in accordance with ISO / IEC 17025. The test is performed in an external, ILAC certified laboratory. 
Data security
Data transmitted wirelessly can be encrypted. Thanks to that, unauthorized persons cannot hijack the communication between sensors and other devices. Efento sensors' software can be updated over the air, which will allow you to easily install any security patch that is released.
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.
LIGHT SENSOR

Measurements range : 0.01 lux to 83 k lux

Filtering: Rejects > 99% (typically) of IR (matches human eye)
RADIO MODULE NB-IOT

NB-IoT bands:
Default: 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
RADIO MODULE BLE

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
COMMUNICATION

Protocol: CoAP; Transmission interval: 5 minutes – 10 days, configurable
SOFTWARE UPDATES

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

Package of 3 x AA, 6300 mAh (replaceable)
Battery operating time: up to 5 years
DIMENSIONS

124x60x26 mm

Weight: 0,15 kg

NOT SURE YET?

Order a starter kit - $165 only

The offer is dedicated to companies only.

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

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Our customers

Newsletter June 2026

Custom dashboards in Efento Cloud
Data presentation just got a major upgrade! Discover the latest Efento Cloud update, featuring fully customizable dashboards that let you visualize your sensor metrics exactly how you want them.
Efento NB-IoT loggers now available with external power supply - USB-C (IP30 enclosure), 9-26V DC terminal (IP67 enclosure)
Go beyond battery limits! Discover how the external power supply option for Efento NB-IoT loggers enables near-real-time data streaming, supports power-hungry 4-20 mA sensors, and triggers instant cloud notifications the moment a blackout occurs.
Seamless Integration with Akenza
Expand your IoT ecosystem! Efento 4-20 mA analog data loggers are now officially integrated with the Akenza platform. Check out our step-by-step tutorial to learn how to seamlessly stream your sensor data via CoAP.
Case Study: Smart Water Level Monitoring - Hungary
See Efento in action. Read our latest case study to discover how our partner in Hungary built a robust, real-time water monitoring system utilizing Efento loggers.
New Features in the Efento iOS App
iPhone users, this one is for you! You can now configure all Efento devices directly from your iOS mobile application, making onboarding to your Efento Cloud account faster than ever. Update your app today to unlock these features!

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