Panel Meter, Energy Meter, Multifunction Power Meter manufacturer / supplier in China, offering Nhr-Ec80 RS485 Continuous Monitoring Recording Temperature Total Dissolved Solids Conductivity Controller for Inudustrial Water, Nhr-FCL80 Cost-Effective Monitoring Residual Free Chlorine Analyzer for Continuous Water Quality Monitoring, Nhr-Ec30 High-Quality AC/DC 24 to 260V Non-Condensing DIN Rail Mounted Water Conductivity Transmitter and so on.