We have been proud from the higher consumer gratification and wide acceptance due to our persistent pursuit of high quality both on product or service and service for Tongdy Carbon Dioxide Meter, , , ,. We never stop improving our technique and high quality to help keep up using the enhancement trend of this industry and meet your gratification effectively. In case you are intrigued in our items, please call us freely. The product will supply to all over the world, such as Europe, America, Australia,Provence, Stuttgart,Salt Lake City, Sri Lanka.We have 48 provincial agencies in the country. We also have stable cooperation with several international trading companies. They place order with us and export products to other countries. We expect to cooperate with you to develop a larger market.