Fuelics, a company specializing in battery-operated narrowband IoT sensors, utilizes Grafana and Grafana Loki for monitoring and visualizing data in smart city environments. During their presentation at GrafanaCONline 2022, Fuelics experts Ioannis Nikolau and Marios Klavdianos explained how their NB-IoT sensors collect vital information such as fuel, water, and waste levels, transmitting this data to the cloud for comprehensive analysis. By employing Grafana Loki, Fuelics ensures efficient data parsing and storage, maintaining the correct time series order and optimizing data streams. Their use of Grafana dashboards allows for intricate visualizations of sensor data, including device metrics and event cross-checking, to ensure measurement accuracy and sensor health. This approach enables the Fuelics team to manage large-scale sensor deployments effectively and deliver precise insights to clients through a user-friendly web application.