For the past 90 years, HYODA INSTRUMENTS has developed with transition of transformers. Blessed with technical guidance by manufacturers of heavy electrical equipment and with ceontinuous effort in the whole process from trial manufacturing to merchandising, the company could have provided a varietyof protective devices for transformers including temperature relay, oil gauge and pressure relief valve.

On the wealth of technological knowledge stored so far, HYODA INSTRUMENTS is determined to strive further for develop-ing highly reliable and new protective devices.