Bluetooth Low Energy

Wireless nitrogen dioxide (NO2) logger

Wireless nitrogen dioxide (NO2) logger measures and transmit gas concentration over Bluetooth Low Energy. On top of nitrogen dioxide concentration in the air, the sensor measures temperature and humidity. You can use a free mobile application to configure the device and read the data from its memory. If you add Efento Gateway, you can build a remote monitoring system for objects which need supervision such as smart cities, public buildings, workshops, assembly halls, industrial companies, etc.

  • Range: 0-4 ppm (4 000 ppb)
  • Temperature: -35 to +70°C, accuracy: up to 0.4°C in the range from -20°C to +70°C and up to 0.5°C in the range -35 to -20°C
  • Humidity: 0 to 100% RH, accuracy 4% in the range of 0 to 80% and 7% in the range of 81 to 99%
  • 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
  • Add Efento Gateway and Efento Cloud to build a real time monitoring system.  The maximum distance between the sensor and the Gateway is 100 m in the open space and 20 – 30 m in the buildings
  • 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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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 5 years on battery. You can forget about changing the battery frequently or troublesome battery 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.
Gas sensors calibration
The gas sensors are pre-calibrated at the factory. If needed, user can independently calibrate the device using mobile application and a gas tank with a known gas concentration.
Data security
Data transmitted wirelessly between the sensor and smartphone/Efento Gateway 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.
Sensor’s passport
Sensor’s passport documents the entire lifecycle of a device. By accessing the data on Efento Cloud platform, the user can check all information about the sensor: date of sale, warranty status, date of calibration, information on all service activities. In addition, the user can download all documents regarding the device – a duplicate of calibration certificate or service protocols.
GAS SENSOR

0-4 ppm (4 000 ppb)

Accuracy: at: -20°C (% output at -20°C/output at 20°C) at 2ppm NO2 50 to 80, at: 50°C (% output at 50°C/output at 20°C) at 2ppm NO2 115 to 130

Measurement interval: 1 minute to 10 days, configurable

Memory size: 60 000 measurements
TEMPERATURE SENSOR

Range: -35° to 70°C

Accuracy up to 0.25°C in the -20°C to +70°C range and 0.5°C in the -35°C to -20°C range

Resolution: 0.1°C

Drift: <0.1°C / year

Measurement interval: 1 minute to 10 days, configurable

Memory size: 60 000 measurements
HUMIDITY SENSOR

Humidity: 0 to 100% RH

Accuracy: 4% in the range of 0 to 80% and 7% in the range of 81 to 99%
RADIO MODULE

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
BATTERY

Battery: 3,6 V, size AA, capacity 2 700 mAh (replaceable)

Battery operating time: at least 5 years (measurement interval: 15 min)
DIMENSIONS

27 x 71 x 71 mm

Weight: 80 g

NOT SURE YET?

Order a starter kit - $197 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:
- Efento Gateway
- Bluetooth Low Energy temperature and humidity sensor
- Efento Cloud access
- Free shipping worldwide

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Our customers

Newsletter (July)

Efento x IoT Creators.
Efento NB-IoT sensors have been successfully integrated with Deutsche Telekom’s platform iotcreators.com. How does it work? Set up an account at iotcreators.com -> Get a SIM card -> configure Efento sensor -> receive sensor’s messages to your server over REST.
New battery life time tool and protocol tool.
We have recently deployed a new set of tools that allow you to simulate the battery life time of Efento NB-IoT sensors depending on their settings and encode/decode protobuf messages sent by the sensors.
Efento on GitHub.
We have launched a GitHub profile, which contains code examples, tutorials on how to integrate Efento’s products into your solutions and useful tools. We will be regularly adding new tools and examples, so don’t forget to follow us!
“How warm is the water?”
This is one of the most common questions you can hear during Swedish summer. Learn how the municipality of Lerum, Sweden uses NB-IoT sensors to monitor and publish on the website current temperatures of water in the lakes.
Efento IoT Academy: BLE sensors integration.
Is it possible to integrate IoT sensors into your solution in less than 60 lines of code?

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