China Ningbo Wellite Eletronic Co.,Ltd. is a leading professional manufacturer of PIR(Passive Infra-Red) sensor switch in China. Our products, gas leak detector, gas leak detection, 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 leak detectors, gas leak detections, natural gas leak detector, natural gas leak detection, combustible gas leak detector, but also provides complete developping solution for our customer.