Beijing Perthden Electrical Engineering Co., Ltd. was established in 1989, specializing in HVAC systems, intelligent building systems and control systems product development, integration, promotion and application. Beijing Perthden Electrical Engineering Co., Ltd. has a strong product development and engineering team, design and development of a large number of industrial products, especially temperature and humidity measurement and control products. The company's leading products for the BR-200HT and BR-500HT series of temperature and humidity sensor transmitter, the product widely used across the country, has been unanimously praised by users. BR-500HT series for the latest products, performance indicators have reached international advanced level. In product development and to undertak.. (more>>)