Technical data
Memory
Efento loggers are equipped with built-in memory capable of storing up to 100,000 records. When the memory becomes full, the oldest records are automatically overwritten by new ones (circular buffer).
The length of time this memory can cover depends on the measurement interval, which is user-configurable from 1 second to 10 days.
Power Supply
Efento NB-IoT loggers are available in two power supply configurations, designed to match the requirements of your specific deployment environment.
Power configurations
External Power Supply: Powered via USB or 9-26V DC, this version features an integrated 1300 mAh Li-Po backup battery to ensure continuous operation during external power outages.
Replaceable Battery: Powered by a high-capacity, replaceable battery pack consisting of an ER26500H cell paired with an SPC1520 capacitor (8500 mAh, 3.6 V), designed for long-term, autonomous operation.
More information on: power supply safety, battery replacement and proper disposal.
Measured values
Efento loggers are capable of monitoring a broad range of physical and environmental parameters. Each logger can support up to six channels, each assigned to a dedicated sensor or probe. Devices can measure over 25 different parameters, including temperature, humidity, air pressure, differential pressure, open/close status, pulse counts, VOC levels, and water leakage.
All features described in this manual apply to every sensor model, while some sensors offer additional model-specific configuration options, such as calibration.
For the complete and up-to-date list of supported sensors, including their accuracy and measurement ranges, visit getefento.com.
Communication interfaces
Narrowband IoT (NB-IoT)
Efento NB-IoT loggers leverage cellular technology compliant with the 3GPP Release 13 standard, delivering a transmission power of 23 dBm to ensure robust signal penetration even in challenging environments. The loggers support a wide array of global frequencies across bands 1, 2, 3, 4, 5, 8, 12, 13, 17, 18, 19, 20, 25, 28, and 66.
To optimize data efficiency and minimize energy consumption over the network, communication utilizes the CoAP (RFC 7252) protocol - supporting both confirmable and non-confirmable data frames - with data payload serialized via Protocol Buffers (protobuf). Data transmission intervals are completely user-configurable, ranging from 1 minute up to 10 days, balancing data granularity with optimal battery longevity.
Users have full flexibility over network deployment, with network settings allowing either automatic or manual configuration of the APN and PLMN. Cellular network access is provided via a standard Micro SIM (3FF) slot, with an Embedded SIM (eSIM) option available upon request.
Bluetooth Low Energy
Efento loggers use Bluetooth Low Energy (BLE) to communicate with smartphones and tablets. They utilize both BLE advertising and BLE connections for communication. For deployments where local wireless interaction is not required, the Bluetooth interface can be completely disabled to further maximize and extend the device's battery lifetime.
Types of enclosures
Efento loggers are available in two enclosure types: IP30 and IP67, each suited for different environments and measurement needs.
General guidelines for choosing the enclosure type:
For precise environmental measurements using the logger’s internal sensors, select IP30.
If the logger will be exposed to moisture or harsh conditions, select IP67 and use external probes.
IP30 Enclosure
Characteristics
Protection level: protected against solid objects larger than 2.5 mm, such as tools and thick wires, no protection against liquids
Airflow: Allows free airflow, making it suitable for loggers that measure temperature, humidity or air quality using built-in sensors
Use cases: Indoor environments, including offices, warehouses, laboratories, server rooms or other sheltered indoor environments
Material: ABS, inflamable
Mounting: 3M adhesive pad with acrylic glue
Advantages:
Provides the best measurement accuracy for built-in environmental loggers
Smaller size, suitable for indoor use
Size
IP67 Enclosure
Characteristics
Protection level: Fully dustproof and waterproof.
Airflow: The enclosure is airtight and does not allow airflow. Therefore, IP67 devices cannot be used for built-in measurements of temperature, humidity, or air quality. IP67 devices must use external probes when environmental monitoring is required.
Use cases: Industrial environments, outdoor installations, places exposed to moisture, wash-downs, dust, or chemicals
Material: ABS, inflamable
Mounting: screws or cable ties
Advantages:
Provides strong protection against water and dust
Suitable for installation in harsh environments or outdoor
Size
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