HART Based Flow Indicator Totalizer

The Flow Indicator Totalizer accepts 4-20mA analog current signal from sensor. It processes the signal and displays the current flow rate per sec or min or hour and the total flow. This system works on PIC microcontroller. The PIC microcontroller acts as an interface between user and the field devices. Two relays are used for control on the process value. The system is programmable by user, user can set points, change the time and flow unit. This system is low cost, robust, any mounting position and low maintenance so that economic. The system is designed for fast and accurate measurement.

Our project is to make this system HART protocol enabled. HART is Highway Addressable Remote Transducer. The benefits of making the system HART protocol is that the system will communicate bi-directionally.

By using this protocol, system will be able to transmit and receive HART signal. The HART signal will not only carry flow rate information but also pressure, temperature and volume, on the same line.