ORO(S1R) Oil Dielectric Strength Tester I. Product i ntroduction The ORO (S1R) Oil Dielectric Strength Tester is a high-accuracy, fully digital industrial instrument meticulously developed by our company's research and technical team in accordance with the relevant provisions of the national standard GB/T 507-2002 and the industry standards DL/T 474.4-2018 and DL/T 596-2015, leveraging our expertise through extensive field testing and sustained, dedicated development efforts.