Efento’s NB-IoT (Narrowband IoT) loggers powered by a standard long-life battery pack can operate for years on end, transmitting crucial environmental data wirelessly. However, there are scenarios where battery power alone limits what your sensors can truly achieve.
Whether you need real-time data streaming or are deploying power-hungry sensor types, the External Power Supply option changes the game.
Why use an external power supply?
While long-life batteries are excellent for standard intervals (e.g., measuring every 15 minutes and transmitting every 3 hours), some industrial applications require more. Choosing an external power option unlocks two benefits:
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Higher data transmission frequency: Cellular data transmission is the most energy-consuming action an NB-IoT device performs. With a permanent power source, you no longer have to budget your battery life. Devices can transmit data as often as your application requires even near-real-time streaming.
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Support for power-hungry sensors: Advanced sensors require more energy to take measurements. With external power, you can run demanding sensors at maximum frequency without worrying about sudden device downtime.
Double the protection: the backup battery & blackout detection
Moving to external power doesn’t mean you sacrifice reliability during power failures. Efento’s external power supply version comes equipped with an internal 1300 mAh backup battery.
If the primary power source goes down due to a grid failure or an unplugged cable, the device seamlessly switches to backup power. Depending on the sensor type and your configured transmission intervals, this backup battery can keep the device operational for several months.
Beyond just keeping the device alive, this architecture turns your logger into a power grid monitor. The moment the logger detects a loss of primary cable power and switches to the backup battery, it can immediately trigger a cloud notification. This allows facility managers to receive instant SMS, email, or webhook alerts about localized blackouts before their critical infrastructure drops temperature or loses pressure.
One architecture, two flexible standards
We have split the physical power design based on the enclosure type, making it highly adaptable for both indoor office settings and harsh industrial fields.
1. The indoors standard: USB-C (IP30 enclosure)
For standard indoor deployments using the IP30 enclosure, Efento includes a dedicated access hole on the side of the casing. This allows you to plug in a certified 5V, 1A USB-C power supply directly into the logger. It’s perfect for server rooms, labs, or office spaces where a standard USB wall plug or power bank is easily accessible.
2. The heavy duty industrial standard: 9-26V DC terminal (IP67 enclosure)
For rugged, outdoor, or factory-floor settings requiring an IP67 weatherproof enclosure, Efento utilizes a terminal block setup. You can feed industrial power lines directly through the bottom cable gland of the enclosure and secure them to the internal screw terminal block. It supports a wide 9-26V DC voltage range, seamlessly integrating into existing 12V or 24V industrial control panels.
Real-world use sases: powering critical data lines
By pairing constant external power with versatile inputs such as Efento’s 4-20 mA current loop loggers you can tackle demanding monitoring scenarios that battery-powered alternatives simply cannot handle.
1. High-frequency industrial automation & 4-20 mA loops
In manufacturing plants, 4-20 mA loops are the backbone of process control, monitoring everything from heavy-duty pressure transmitters to fluid flow meters. Because these transducers draw constant current, pairing them with an externally powered 9-26V DC Efento logger allows for continuous, high-frequency data sampling. This gives plant managers real-time insights into system health and immediate alerts if a threshold is crossed, rather than waiting hours for the next scheduled battery transmission.
2. Power-hungry gas and air quality monitoring
Sensors that detect volatile organic compounds (VOCs), particulate matter (PM2.5/PM10), or specific gases often rely on internal heating elements or miniature fans to draw in air samples. These components consume massive amounts of energy. External power ensures these sensors can take constant readings in smart cities, factories, or chemical plants without draining a battery in a matter of days.
3. Continuous cold chain and laboratory tracking
In pharmaceutical warehouses and ultra-low temperature laboratory freezers, a few minutes of unexpected temperature fluctuation can ruin millions of dollars in inventory. Externally powered loggers allow for near-instantaneous transmission of temperature anomalies. Thanks to the backup battery, if the facility experiences a massive power outage, the loggers immediately alert staff to the blackout while continuously measuring and reporting the safety of the environment throughout the emergency.
4. Water and wastewater management
Deployed in water treatment facilities or remote pumping stations, 4-20 mA hydrostatic level sensors or flow meters need to track rapid changes during heavy rainfall or system blockages. Wired into the local 24V DC industrial power grid, the IP67-rated Efento logger can stream continuous telemetry to the cloud, allowing operators to react to overflow risks instantly, even if the station loses main power.
Conclusion
Efento’s external power option bridges the gap between low-power remote telemetry and high-performance, high-frequency industrial data streaming. By removing power constraints, offering immediate blackout diagnostics, and keeping a strong battery backup framework, it provides the ultimate flexibility for modern IoT infrastructure.
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