The Efento NB-IoT logger accurately measures air pressure, temperature and humidity and is ideal for indoor environments such as warehouses, hospitals, museums, laboratories and airports. Thanks to NB-IoT connectivity, the sensor sends its data directly over the mobile network – without a router, gateway or other peripheral equipment.

The logger also features Bluetooth Low Energy, making configuration with a smartphone quick and easy. The NB-IoT sensors can be linked to Efento Cloud or to any other cloud solution.

Key Specifications

• Temperature: –15 to +70°C, accuracy up to 0.4°C

• Humidity: 0–99% RH, accuracy up to 4% (0–80% RH)

• Air pressure: 300–1100 hPa, absolute accuracy ±3 hPa, relative ±0.12 hPa

• Battery life up to 5 years, completely maintenance-free

• Data transfer via NB-IoT to Efento Cloud or another platform

• Adjustable measuring interval: 1 minute to 10 days

• Alarm thresholds configurable; when exceeded, data is sent immediately

• Memory for 40,000 readings (FIFO)

• Configuration via the cloud or via smartphone (Bluetooth LE)

• Compact design: 124 × 60 × 26 mm, weight 0.13 kg

Key Features

Efento Cloud

Combined with Efento Cloud, the sensor offers continuous monitoring, alarm notifications when limits are exceeded, and automatic reporting and analysis.

Long battery life

Designed for years of operation without maintenance: up to 10 years depending on configuration.

Lower installation costs

Thanks to wireless operation and the cloud environment, installation and maintenance are minimal.

Expandable sensor networks

Efento supports various sensor types, so you can easily add extra parameters whenever needed.

Easy integration

Standardized communication protocols allow connection with any cloud or mobile application.

Fast installation

A smartphone with the free app is all you need. Configuration takes less than 15 minutes.

Technical Data

Temperature sensor

• Range: –15° to +70°C

• Accuracy: up to 0.4°C

• Resolution: 0.1°C

• Drift: <0.1°C/year

• Measuring interval: 1 min – 10 days

• Memory: 40,000 readings

Humidity sensor

• Range: 0–99% RH

• Accuracy: 4% (0–80% RH)

• Resolution: 1%

• Hysteresis: ±1% RH

• Drift: <0.25%/year

• Measuring interval: 1 min – 10 days

• Memory: 40,000 readings

Pressure sensor

• Range: 300–1100 hPa

• Accuracy:

  • Absolute: ±3 hPa (0–65°C)

  • Relative: ±0.12 hPa (0–65°C, p = 800–900 hPa)

• Resolution: 0.1 hPa

• Measuring interval: 1 min – 10 days

• Memory: 40,000 readings

NB-IoT

• Frequency bands: standard B8 and B20

• On request: B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B66

• 3GPP Release 13

• Power: 23 dBm ±2 dB

Bluetooth Low Energy

• Frequency: 2.4 GHz

• Power: 2.5 mW (4 dBm)

• Range: up to 100 m (LOS)

• Transmission period: 1 s

Communication

• Protocol: CoAP

• Transmission interval: 5 minutes – 10 days (adjustable)

Software updates

• Over-the-air (delta)

• Via Bluetooth Low Energy

Power supply

• 3 × AA batteries (6300 mAh, replaceable)

• Lifetime: up to 5 years

Dimensions & Weight

• 124 × 60 × 26 mm

• 0.13 kg