The +GF+ SIGNET 9900 SmartPro Transmitter is a precision instrument that connects with a SIGNET flow sensor and provides digital readings. The bar graph and units of measure can be customized to the application. The SmartPro Transmitter is versatile. It can also be used with several other SIGNET sensors (sold separately) to display readings of pH, ORP, Conductivity/Resistivity, Salinity, Temperature, Pressure, and more. The SmartPro is highly illuminated with an auto-sensing backlit display, making it viewable from 4 to 5 times the distance over traditional transmitters.