Which brand of formaldehyde detector is good

The top ten brands of household formaldehyde detectors are Bolantong, Aldehyde Knowledge, A BaoYi, etc. The company was founded in 2013 with a registered capital of 1 million dollars. Bronte company was founded in 2013, the registered capital of 1 million, the company's main business is medical equipment and information platform, and then began to do air detector products; aldehyde know is Haier collective subsidiary brand, is the earlier use of bluetooth, infrared Internet technology air detector brand, with Haier's brand advantage; A Bao Royal is the company was founded in 2001, is the research and development, production, after-sales service in the As a whole, the company through the ISO9001 quality management system certification.