Since beginning from 2007, DOAHO Shanghai Co., Ltd is specialized in manufacturing varieties of quality inspection instruments, testing equipment and other high-tech products, mainly including programmable constant humidity and temperature testers, high/low temperature testers, thermal shock test chamber, salt spray testers, aging testers, drying ovens, tension testers and other quality testing instruments. With several decades of R&D efforts, DOAHO has become a leading supplier of testing instruments in the same industry, playing a crucial role in the research and development of high-quality and high-value products in environmental industry. DOAHO&＃039;s Major Products including: (1) Temperature & Humidity Test Chamber (2) High/Low Temperature Test Chamber (3) Universal Testing Machine (4) High/low Temperature Testers with Rapid Temperature Change (5) Hot & Cold impact Test Chamber (6) Salt Spray Test Chamber (7) Drying Ovens (8) Tension Testers (9) Sand and Dust Testing Machine (10) Aging Test Machine (11) Rain Spray Test Machine (12) Low Temperature Test Machine (13) High Temperature Test Machine (14) Ozone Aging Test Machine (15) Anti-yellowing Aging Test Machine (16)Large walk-in test room (17)Vibration Combined Test Chambers We always adhere to the principle: To promote the Chinese quality progress, and do the best environmental equipment for all over the world.