China Ningbo Wellite Eletronic Co.,Ltd. is a leading professional manufacturer of PIR(Passive Infra-Red) sensor switch in China. Our products, gas alarm, are widely being used in automatic light control, promoting convenience, safety and cost-saveing. We employed Total Quality Management and established an ISO9001:2000 quality management system. With the belief that goods products and good service will lead us to the success. Wellite not only sells our existing products, gas alarms, natural gas alarm, gas detector alarm, explosive gas alarm, propane gas alarm, lp gas alarm, gas alarm system, lpg gas alarm, co gas alarm, gas detection alarm, combustible gas alarm, but also provides complete developping solution for our customer.