What types of transformer oil level gauges are available?

There are several types of transformer oil level gauges available, including mechanical float gauges, electronic level sensors, and sight glasses. Mechanical float gauges use a buoyant float to indicate oil levels, while electronic sensors provide precise measurements and can integrate with monitoring systems. Sight glasses offer a visual indication of oil levels. Each type has its advantages, such as ease of installation, accuracy, and real-time monitoring capabilities, catering to different operational needs in power transformers.