Profile: Shanghai Sunny Instrument Co., Ltd. is a manufacturer and exporter of various kinds of instruments, including flow meters, level meters, pressure instruments, thermometers, and level switches. Our resistance temperature detectors are used for special thermal resistance in power stations, primarily for thermal power units under 60 million kilowatts. Paddle type flow switch is used to sense the flow change in the liquid lines so as to protect the equipment against damage which could be cased by flow stopping in the pipeline. Liquid flow either exceeds or drops below the set flow rate. Set flow rate can be adjusted according to different flow requirements. SPDT micro switch ensures quick action, and guarantees the transient of the switch.