© Sensirion Connected Solutions AG, CH Rev. 0.2 –D1 - Jun 22 5/21
2System description
2.1 System operation overview
The Nubo Sphere monitoring system consists of multiple Nubo sensor nodes, a cloud-based data analytics system
and a user- and mobile-friendly web interface. The node has two slots for sensing cartridges. The cartridges can
be easily exchanged for maintenance or upgrading. At the current stage, a methane (CH4) sensing cartridge based
on metal-oxide (MOx) technology is available. In the future, we plan to offer improved cartridges for faster and more
precise methane emission detection. The currently unused second cartridge slot could be used to extend the
parameter space once other cartridges become available.
Because of the solar panel, the low-power electronics and the state-of-the-art lithium-ion batteries, the nodes
operate fully autonomously even under the most adverse conditions and without the need to deploy electric power
cables. The compact size ensures easy deployment wherever needed. At least one of the nodes is equipped with
a wind meter in addition to the methane sensor to enable measurement of the local wind speed and direction at
any time.
The nodes transmit the data constantly to the cloud platform via LTE-M or 2G (GPRS). Every node has its own
connectivity to ensure maximum redundancy, simple and rapid setup and flexibility. At the cloud level, the signals
are refined to exclude artifacts and ensure maximal data fidelity. The algorithms have been developed on the basis
of Sensirion’s extensive know-how with the employed sensor technologies and their application in the field.
Our advanced analytics system continuously applies algorithms based on physical modelling to the refined data to
detect any emission as early as possible. The models allow for automatic and reliable localization and quantification
of most leaks. The models and their output are continuously improved and supervised by our dedicated team of
data scientists to improve accuracy and avoid false positives.
The status of all your sites can be easily monitored on the intuitive dashboard in any web browser or smartphone.
Sites where action is most urgently required can be easily identified, and their status can be tracked during the
repair process. The best mitigation action can be easily determined on the basis of the intuitive data visualization
of the location and size of any emission event. If critical emission events are detected, you will receive notifications
to enable your team to react rapidly.
