8# Building, #9 Courtyard Dijin Rd. Haidian district

Tongdy Control Technology has designed and manufactured high quality IAQ products and HVAC controllers for 15years. Our IAQ products includes transmitters/ /controllers of carbon dioxide and carbon mo...

HUMIDITY INDICATOR , COBALT FREE HUMIDITY INDICATOR...

Shanghai Dingsheng Packaging Co.,Ltd is a manufacturer of desiccant and humidity indicator with well-equipped testing facilities and strong technical force.With a wide range, good quality, reasonable ...