Abstract
Employing second generation mobile technology in process plant for Temperature and Pressure process” is designed to control instruments or high end appliances in process plant through mobile phones. Temperature sensor, pressure sensor and heater coil are connected to the PIC microcontroller using suitable signal conditioning circuits. A program is written to compare the set point values and measured values. If the measured value crosses the set point value, the PIC microcontroller sends an alter SMS to the process engineer’s mobile phone. The GSM module is used for transferring the alert message to the GSM network. An FBUS data cable is used to interface GSM module with PIC microcontroller.