Flexible Rogowski coil current sensors for smart grid monitoring. ART (indoor) is designed for IoT remote energy monitoring in smart city and building applications, transmitting RMS current statistics via LORA, SIGFOX, or 3G/GPRS networks every 10-15 minutes for remote consumption analysis and anomaly detection. ARU (outdoor) is built for grid monitoring and intelligent substations, with a 10.4mm gauge coil in aperture sizes from Ø70mm to 300mm, UV, water, dust, and ice resistance, and a robust Twist and Click closure for field installation.

ARU output is a low voltage signal proportional to the rate of change of primary current (100 mV/kA @ 50Hz); an electronic integrator is required to convert this to a current-proportional output. Overvoltage category III (up to 1000V AC) or IV (up to 600V AC); -40°C to +80°C operating range; suitable for dry and damp locations.