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Utilizing Hall-effect sensors, electronic signal processing through filtering, and digital data transmission via Arduino and Bluetooth, the instantaneous line currents are visualized in MATLAB (R2023a) as time-based curves. The sensor box can also be remotely released from the transmission line once measurements are complete, allowing a fully autonomous mode of operation. Laboratory tests demonstrated promising results for real-world applications, with measurement efficiencies ranging from 92% to 98% under various test conditions, including stress tests involving harmonics and total harmonic distortion up to 40%. Future work will focus on implementing effective shielding against high electric fields to further enhance reliability and advance the sensor\u2019s industrialization as a novel solution for power grid digitalization.<\/jats:p>","DOI":"10.3390\/jsan15010009","type":"journal-article","created":{"date-parts":[[2026,1,13]],"date-time":"2026-01-13T18:40:09Z","timestamp":1768329609000},"page":"9","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A Pre-Industrial Prototype for a Tele-Operable Drone-Mountable Electrical Sensor"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4667-9664","authenticated-orcid":false,"given":"Khaled","family":"Osmani","sequence":"first","affiliation":[{"name":"Department of Electrical Engineering, Helmut Schmidt University, 22043 Hamburg, Germany"}]},{"given":"Marc Florian","family":"Meyer","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Helmut Schmidt University, 22043 Hamburg, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3343-8653","authenticated-orcid":false,"given":"Detlef","family":"Schulz","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Helmut Schmidt University, 22043 Hamburg, Germany"}]}],"member":"1968","published-online":{"date-parts":[[2026,1,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"10820","DOI":"10.1109\/ACCESS.2025.3528640","article-title":"State-of-the-Art Review of Emerging Trends in Renewable Energy Generation Technologies","volume":"13","author":"Tiismus","year":"2025","journal-title":"IEEE Access"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"63400","DOI":"10.1109\/ACCESS.2024.3396402","article-title":"Smart Grids Empowered by Software-Defined Network: A Comprehensive Review of Advancements and Challenges","volume":"12","author":"Velasquez","year":"2024","journal-title":"IEEE Access"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"113543","DOI":"10.1109\/ACCESS.2023.3324177","article-title":"A Review of Cybersecurity in Grid-Connected Power Electronics Converters: Vulnerabilities, Countermeasures, and Testbeds","volume":"11","author":"Fu","year":"2023","journal-title":"IEEE Access"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Wang, L., Zhang, Z., Kong, X., Guo, L., Li, X., and Xue, W. 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