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Upgraded ARC1

Keller has upgraded the ARC1, Keller's IoT communications module, to the latest transmission technology with NB-IoT (narrow band) and LTE-M.

Keller was able to adapt the firmware and integrate the hardware (new transmission module) in no time at all thanks to a modular design.

Last year, mobile communications providers announced that the new NB-IoT and LTE-M standard would be rolled out in late 2019 and be available for energy-saving IoT devices. Based on the fourth generation of mobile communications technology (4G), this technology uses the LTE transmission technology and serves as an interesting alternative to other data transmission technology, such as LoRaWAN, for example.

NB-IoT and LTE-M features
•    Low power consumption, meaning the battery lasts longer
•    Higher transmission ranges or lower penetrations through the building
•    Lower hardware costs
•    Enough data throughput for IoT applications or for sending measurement data
•    Can be used around the world with roaming and specific frequencies

The ARC1 IoT device is used everywhere where pressure is measured or water levels need to be recorded. The ongoing digitalisation of cities (digital city) and Industry 4.0 has brought about a demand for IoT (Internet of Things) devices.

Thanks to the modular design of the ARC1 remote transmission unit, we were able to integrate this technology into the KELLER AG für Druckmesstechnik ARC1 after a short development phase.
The first series of the ARC1 devices with NB-IoT and LTE-M transmission is currently being field-tested. Test devices can already be delivered to customers upon request.

The data sent by ARC1 can naturally be accessed at any time from anywhere in the world directly in the KOLIBRI Cloud (

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