The Transformer Digital Top-Oil Temperature Controller is an advanced device comprised of a mechanical section and a digital sensing unit, tailored for effective temperature regulation in transformers. This cutting-edge controller features a sealed system filled with a temperature sensing medium, allowing it to accurately respond to temperature fluctuations. As the temperature changes, the volume of the sensing medium in the temperature sensing component adjusts accordingly, which is transmitted through elastic elements and sensing conduits. This results in a measurable displacement that is amplified to indicate the transformer’s temperature and activate a micro switch for controlling the cooling system, Utilizing composite sensing technology, the controller converts the Pt100 platinum resistance signal from the temperature pack into an RS485 digital signal, facilitating seamless communication with control room terminals. The device can store up to 10,000 monitoring data points and operational statuses, with the capability to export this information. Its features include remote data transmission, alarm outputs, control signals, and local indications for communication abnormalities and self-checking faults. It can simultaneously display and control top oil temperature or winding temperature, making it highly versatile, Manufactured in China, this device boasts several advantages such as electrical isolation for communication, easy installation, strong anti-interference capabilities, and remote configuration options. As a leading Supplier in the industry, we ensure that our Transformer Digital Top-Oil Temperature Controller fulfills the remote online monitoring requirements for power transformer oil temperatures, delivering reliability and precision in thermal management