The Efento NB-IoT Wireless Illuminance Logger is a lux meter that measures light intensity as perceived by the human eye. Thanks to its precise spectral response and strong IR rejection, the sensor accurately measures visible light, regardless of the light source.
Thanks to NB-IoT connectivity, the logger sends data directly over the mobile network, without additional devices such as routers or gateways. For quick configuration, the sensor features Bluetooth Low Energy, allowing you to easily set up and read it out via smartphone. The sensor can be integrated with Efento Cloud or any other cloud platform.
Key features
Measuring range: 0.01 to 83,000 lux
IR filtering: >99% IR is rejected, tuned to the human eye
Memory: 40,000 readings, oldest data automatically overwritten
Measuring period: adjustable from 1 minute to 10 days
Battery life: up to 5 years maintenance-free on replaceable AA batteries (3× AA, 6300 mAh)
Efento Cloud: real-time monitoring, alarm notifications, reporting and analysis
Easy installation: configuration via smartphone in under 15 minutes
Integration-friendly: standard protocols (CoAP) for connecting with any cloud platform or mobile application
Technical specifications
Light sensor:
Measuring range: 0.01 lux – 83,000 lux
IR filtering: >99% (typical), tuned to the human eye
NB-IoT:
Bands: B8/B20 standard, other bands on request
3GPP Release 13, transmit power 23 dBm ±2 dB
Bluetooth LE:
Frequency: 2.4 GHz, transmit power 2.5 mW (4 dBm), range up to 100 m (LOS)
Communication:
Protocol: CoAP, transmission interval: 5 minutes – 10 days (adjustable)
Software updates: over-the-air or via BLE
Dimensions & weight: 124 × 60 × 26 mm, 0.15 kg
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