
LoRaWAN and M-Bus Sensor Technology
Sensors record measured values and prepare them for downstream systems for further data processing. Energy management systems such as Efficio can access the recorded data for various analysis purposes. The sensor data can be used to initiate optimization measures.
Example applications for sensors:
- Electrical signals for automation technology (S0 pulses, analog signals 0 V DC to 10 V DC, 0 mA to 20 mA)
- Room climate (temperature, humidity, CO2 content, brightness)
- Presence detection (how much movement takes place in the room)
- Access control (door closing contact)

Indoor Temperature Humidity Sensor M-Bus
The measurement of temperature and humidity is the basis for improving energy efficiency and indoor climate. The temperature and humidity sensor enables the direct recording of indoor temperature and humidity via the M-Bus. The sensor can be connected, for example, via a two-wire connection directly to the Berg data logger BDL or LTE M-Bus Master. The power supply is provided via the M-Bus.
Features
- Broad communication range
- One-touch commissioning for secure and flexible configuration
- User-friendly user interface
- High measuring accuracy
- Guaranteed battery life of at least 12 years
Technical data
Dimensions (W × H × D) in mm: | 85 × 86 × 31 |
Protection class | IP 20 |
Input voltage | 21…42 V DC |
Power consumption | 1.5 mA (1 standard load) |
M-Bus baud rate | 300 and 2,400 bps |
Operating temperature | 0…70°C |
Measuring range | 0…70°C |
Measuring accuracy | 0…60°C ±0.7°C |
Measuring accuracy | 10…30°C ±0.1°C |
Operable at humidities from | 0…100% (noncondensing) |
Measuring accuracy, humidity | 10…90% rF ±2% |
0…100% rF ±4% |
Outdoor Temperature Humidity Sensor M-Bus
Measuring temperature and humidity is the basis for improving energy efficiency and indoor climate. The temperature and humidity sensor enables the direct recording of outdoor temperature and humidity via the M-Bus. The sensor can be connected, for example, via a two-wire connection directly to the Berg data logger BDL or LTE M-Bus Master. The voltage supply is provided via the M-Bus.
Features
- High communication range
- One-touch commissioning for secure and flexible configuration
- User-friendly user interface
- High measurement accuracy
- Guaranteed battery life of at least 12 years
Technical data
Dimensions (W × H × D) in mm: | 80 × 80 × 52 |
Protection class | IP 54 |
Input voltage | 21…48 V DC |
Power consumption | 1.5 mA (1 standard load) |
M-Bus baud rate | 300 and 2,400 bps |
Operating temperature | –40…55°C |
Measuring range | –40…85°C |
Measuring accuracy | –40…55°C ±1.5°C |
Measuring accuracy | 10…30°C ±0.2°C |
Measuring accuracy | –10…10°C ±0.5°C |
Operable at humidities from | 0…95% (noncondensing) |
Measuring accuracy, humidity | 10…90% rF ±2% |
0…100% rF ±4% |


RS485 to LoRaWAN Converter
The RS485 to LoRaWAN converter converts the RS485 signal into a LoRaWAN radio signal. The converter can be used, for example, to connect energy meters with Modbus RTU output in order to achieve remote readings at very distant locations.
Technical data
Radio frequency | 868 MHz |
Antenna | External, included in delivery |
Power supply | 24 V DC |
Field bus | RS485 Modbus RTU |
LoRaWAN Indoor Air Quality Sensors
The sensors are used to measure the room climate: they measure the temperature and humidity.
Depending on the sensor variant, the CO2 content, brightness, movements, and room occupancy can also be recorded. The optical visualization takes place via the traffic light colors green, yellow, and red.
Technical data
Radio frequency | 868 MHz |
Antenna | Integrated |
Battery type (part no. 004897) | 3.6 V AA, not included in delivery |
Battery life | Up to 5…10 years |
Dimensions (W × H × D) in mm | 86.0 × 86.0 × 27.6 |
Variants
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LoRaWAN Room Sensor for CO2 Measurement Item number: 004905 The sensor is used to measure the room climate, it measures temperature and humidity, CO2, light and motion (PIR). It also has a traffic light function that informs you when a certain threshold has been reached and transmits the values via LoRaWAN.


LoRaWAN Outdoor Temperature Sensor
The waterproof LoRaWAN outdoor temperature sensor is used to measure the ambient temperature. It measures temperatures from –55°C to 125°C with an accuracy of ±0.5°C. The moisture-resistant and rustproof sensor is suitable for continuous use.
Technical data
Radio frequency | 868 MHz |
Antenna | External, included in delivery |
Battery type (art. no. 004897) | 3.6 V lithium ER26500 C is not included in delivery |
Battery life | Up to 10 years |
Operating temperature | –55…125°C |
Dimensions (W × H × D) in mm | 65 × 47 × 97 |
Protection class | IP 68 |
Variant
LoRaWAN Pulse Meter
The LoRaWAN pulse meter is used to measure analog or digital signals. It is used, for example, for recording the pulses of electricity meters or for recording analog sensors.
Thanks to its waterproof and dustproof housing, it is ideal for outdoor use.
Technical data
Radio frequency | 868 MHz |
Antenna (art. no. 004919) | External, not included in scope of delivery |
Battery (art. no. 004897) | 3.6 V AA lithium battery is not included in delivery |
Battery life | Up to 2 years |
Operating temperature | –40…60°C |
Dimensions (W × H × D) in mm | 94 × 59 × 35 |
Protection class | IP 67 |
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Interface configurable to one of the following functions: |
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Variant
Accessories

LoRaWAN I/O Controller
The LoRaWAN I/O controller is a module with a broad range. It can be parameterized for various I/O interfaces such as digital inputs and outputs, analog current and voltage inputs, and relay outputs.
Technical data
Radio frequency | 868 MHz |
Antenna | External, included in delivery |
Power supply | 24 V DC |
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Interfaces configurable to one of the following functions |
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LoRaWAN Door Window Contact
The indoor LoRaWAN sensor measures the number of times a door or window is opened.
It also indicates the status (open or closed).
Technical data
Radio frequency | 868 MHz |
Antenna | Integrated |
Battery type (art. no. 004897) | 3.6 V AA is not included in delivery |
Battery life | Up to 10 years |
Dimensions (W × H × D) in mm | 74.9 × 20.8 × 21.2 |
Magnet | Included in delivery |
Variant
LoRaWAN Meter Module BMH3603
The plug-in card is used to transmit meter data via LoRaWAN. It can be operated with BMH 3603 or BMC 3603 heat or cold flow meters. The simple mounting of the meter module enables a quick conversion to LoRaWAN technology.
Technical data
Radio frequency | 868 MHz |
Antenna | Integrated |
Battery | Integrated |
Battery life | Up to 10 years |


LoRaWAN OptoHead KLAX
The KLAX optical head is used for reading electricity meters via LoRaWAN. For this purpose, the KLAX is attached by magnet to the integrated optical interface of modern measuring devices.
The optical head picks up the signals via an infrared interface and transmits them via LoRaWAN.
The determined meter values are available in the LoRaWAN backend shortly after the measurement and can be further processed, for example, with the Efficio energy management software.
Technical data
Radio frequency | 868 MHz |
Antenna | Integrated |
Battery (art. no. 004938) | 3 V AA lithium battery is not included in delivery |
Interface | Infrared SML |
Operating temperature | 0…60°C |
Mechanics | Magnetic mounting (ABS housing) |
Protection class | IP 20 |
Dimensions (W × H × D) in mm | 96 × 35 × 40 |