NB-IoT

Wireless illuminance logger

Efento NB-IoT wireless light intensity loggers deliver continuous, high-precision illuminance monitoring for facilities requiring optimized lighting and material protection – from offices, warehouses, and production halls to greenhouses, museums, and smart building systems (BMS). Designed with a precision spectral response matching human eye perception and strong IR rejection, it accurately measures lux levels regardless of the light source. This enables automated lighting control, energy optimization, workplace condition compliance, and the reliable safeguarding of light-sensitive artifacts and materials.

By transmitting data directly over the cellular network (Narrowband IoT), the device operates completely independently – requiring no gateways, routers, or local Wi-Fi configuration. The integrated Bluetooth Low Energy interface enables quick, intuitive setup via smartphone in under 15 minutes, while its open architecture ensures seamless integration with Efento Cloud or any third-party IoT platform.

  • Ambient light measurement: 0.01 to 83,000 lux, with accuracy of ±10%
  • Flexible Power Options: Choose between a long-life primary battery (8,500 mAh) offering up to 8 years of maintenance-free operation, or a rechargeable USB-C variant (1,300 mAh)
  • Expanded internal memory: Stores up to 100,000 measurements, ensuring zero data loss during network disruptions
  • Configurable intervals & instant alarms: Flexible logging (5 seconds to 7 days) with immediate alerts when safe thresholds are breached
  • Easy setup & remote management: Quick configuration via mobile app in under 15 minutes
Check our prices
Wireless Illuminance logger NB-IoT
Wireless Illuminance logger NB-IoT

Key features

Efento Cloud Platform

Complete solution for continuous monitoring, customizable dashboards, instant SMS/VMS/PUSH/email threshold alerts, and automated reporting.

Long battery life

Engineered for long-term, maintenance-free operation (up to 8 years on battery) or available in a rechargeable USB-C variant.

No Gateways Required

Transmits data directly over the cellular network (NB-IoT). With no local routers, gateways, or complex Wi-Fi configuration needed, you significantly reduce both installation and maintenance costs.

Easy Set Up

Quick local configuration using a smartphone and Bluetooth LE mobile app. Up and running in under 15 minutes without specialized IT skills.

Data Safety & Internal Buffer

Internal memory stores up to 100,000 measurements. If cellular connectivity is temporarily lost, all log data is safely saved and automatically transmitted once connection is restored.

Integration

Standard CoAP protocol and open APIs enable seamless integration with any 3rd-party cloud platform, SCADA, or custom software.
Edge analytics & smart transmission
The logger can process measurement data locally and optimize when information is transmitted. This helps reduce unnecessary cellular communication and supports long battery life while ensuring important events are reported promptly.
Remote configuration & firmware updates
Manage devices remotely without on-site visits. Configuration changes and firmware updates can be delivered over the air, helping reduce maintenance effort and keeping deployed devices up to date.
Custom factory configuration
Devices can be supplied with a customer-specific configuration prepared before shipment. Measurement intervals, transmission settings, APN, PLMN, and other parameters can be preconfigured according to project requirements, reducing installation time and simplifying large-scale deployments.
Customer-provided SIM cards
The logger can operate with SIM cards supplied by the customer, allowing the use of a preferred local mobile operator and existing connectivity agreements. This gives customers greater flexibility in regions where their own operator provides the best NB-IoT coverage or commercial conditions.
LIGHT SENSOR

Model: Texas Instruments OPT3001DNPT

Measurement range: 0-83 000 lx

Accuracy: +/- 10%

Resolution: 0.1 lx

Filtering: rejects >99% IR (typical), spectral response matched to the human eye
DATA LOGGING

Measurement interval: 5 s – 7 days (user-configurable)

Memory size: 100 000 measurements
BLUETOOTH INTERFACE

Radio module frequency: 2,4 GHz

Power: 2,5 mW (4 dBm)

Range: up to 100 m (LOS)

Transmision period: 1 s

Bluetooth version: Bluetooth Low Energy (4.0)
NB-IoT INTERFACE

NB-IoT bands:
Default: B8 and B20
On request: 1, 2, 3, 4, 5, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 66, 70, 71, 85

3GPP: 13 i 14 (LTE Cat NB2)

Power: 23 dBm ±2 dB
COMMUNICATION

Protocol: CoAP

Trasnsmission interval: 1 min – 7 days (user-configurable)
OPERATING & STORAGE CONDITIONS

Main unit operating conditions; temperature: -25°C to +70°C, humidity: 0-99% RH (non-condensing)

Storage conditions; temperature: -25°C to +70°C

Charging conditions (variants with external power supply); temperature: 0°C to +45°C
CERTIFICATIONS

Regulatory: CE (RED), FCC

Environmental: RoHS
SOFTWARE UPDATES

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

Variant 1:
Power Supply: 8,500 mAh battery replaceable). Battery life up to 8 years
Enclosure: IP30, white ABS plastic, dimensions: 32.5 × 60 × 125 mm

Variant 2:
Power Supply: USB-C, with a 1,300 mAh rechargeable backup battery to maintain operation in case of power loss
Enclosure: IP30, white ABS plastic, dimensions: 32.5 × 60 × 125 mm

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

Order

Our customers

Newsletter September 2026

New gateway BLE/LTE for transport
The device features an IP67 enclosure and transmits data from compatible BLE loggers directly to the cloud.
Power supply: 5V DC / 1A, USB-C, backup battery: LI-Po, 3200 mAh (up to 12 hours backup power).

Efento Cloud for hospitals – safety, savings and full control
A hospital consists of thousands of processes, devices, and rooms whose proper functioning is essential for patient safety. One of these is ensuring proper storage conditions for medicines, vaccines, medical supplies, and laboratory samples.
Efento devices can also monitor gas and liquid pressure, water leaks, and visitor footfall.
Efento Cloud enables automated monitoring and control.
Automated pressure warning systems
Pressure sensors are installed in water, oil, chemical, or compressed air pipelines for continuous pressure monitoring. In the event of a pressure issue, a PLC controller operates a pump or valve to immediately increase or decrease the pressure. However, most pressure sensors only provide control signals and lack alerting capabilities.
Differential Pressure Monitoring in Vietnam
The facility was originally equipped with analog differential pressure gauges, which did not allow for remote monitoring or automated record-keeping to document production conditions.
Is it necessary to archive reports from the Efento system?
Data from temperature loggers used in the storage and transport of vaccines must be kept for at least 5 years. In the case of the Efento system, measurement data from the loggers is stored for 6 years. To ensure that nothing is lost (e.g., due to a failure), it is simultaneously saved in two independent data centers (AWS servers).
We were busy deploying 150,000 NB-IoT sensors – The Things Conference
The 9th edition of The Things Conference—the premier global IoT event held on September 22–23, 2026, in Amsterdam—brought together over 2,500 experts from around the world.
We are proud to have been a Bronze Partner of this conference.

Subscribe to our Newsletter