Non-contact infrared temperature sensors are ideal: they can provide an accurate, instant reading of the surface temperature of the conductor, while remaining physically isolated from the voltage it carries. Temperature monitoring in high-voltage busbar systems is vital for preventing faults, yet difficult due to electrical hazards, limited accessibility in switchgear cabinets, and interference risks in traditional contact-based methods. Statistical analysis from electrical utilities worldwide reveals that thermal-related failures account for 30-40% of all high voltage switchgear breakdowns, with average repair costs. The AP Sensing Linear Heat Detection (LHD) solution consists of a fiber optic sensor cable fitted within the switchgear or attached to the busbar, plus a DTS control instrument that measures a complete temperature profile within seconds. Inside the switchgear cabinets, power is transferred by copper busbars that are bolted. Busbars are critical in switchgear, substations, and power distribution units (PDUs) for reliable and efficient power distribution. Busbars have. Wireless temperature measurement system, specially built for high voltage electrical contact temperature monitoring. in high-voltage switchgear cabinets.