I am an engineer in HK and I have a request for measuring water flow in rainwater sewage. They would like to transmit the measured data using 2G modem to a cloud sever. However, the system will be installed inside the sewage and is covered by a metallic solid cover (15-20cm thick). We tried different antennas and could not make the signal passing through the cover. I learnt that you had a REFLECTOR technology, which may solve this issue. I am wondering whether you have a product for this application.
Yuen siu man