Suzhou Derui Keyi instrument and Equipment Co., Ltd. is an innovative high-tech enterprise integrating R & D, design, production, software development, technical consultation and so on. The company has a professional team of nano film photovoltaic technology and photovoltaic performance testing talents. Adhering to the product concept of "strict requirements and high standards", the company follows strict quality management methods to endow products with high stability, accurate accuracy and strong durability. Guided by customer demand and supported by technical force, product quality and after-sales service, the company provides professional thin-film photovoltaic performance attenuation test and analysis services for domestic and foreign scientific research users.