u/Few_Kaleidoscope_736

I have to create a temperature sensing system for a multi chain restaurant without using sensors only the thermistor that should measure the temperature inside the cold chamber and then display it outside the chamber using an lcd . There should bee separate button to set the threshold⁴ of the system⁴ after which if the temperature of the chamber increases more then the threshold a buzzer would buzz after 1 min after the temperature went above the room temperature

The system should work on battery and for 1 year battery should not get over and for 3 years the device should work .The total amount that has given is 30 dollars per device I need to design a system that is produced in mass I don't need calibration that we do in prototype.

Please help me to get this designed

The system should work properly under range of -10 to 50 degree Celsius

I have to create a temperature sensing system for a multi chain restaurant without using sensors only the thermistor that should measure the temperature inside the cold chamber and then display it outside the chamber using an lcd . There should bee separate button to set the threshold⁴ of the system⁴ after which if the temperature of the chamber increases more then the threshold a buzzer would buzz after 1 min after the temperature went above the room temperature

The system should work on battery and for 1 year battery should not get over and for 3 years the device should work .The total amount that has given is 30 dollars I need to design a system that is produced in mass I don't need calibration that we do in prototype.

Please help me to get this designed

The system should work properly under range of -10 to 50 degree Celsius

I have to create a temperature sensing system for a multi chain restaurant without using sensors only the thermistor that should measure the temperature inside the cold chamber and then display it outside the chamber using an lcd . There should bee separate button to set the threshold⁴ of the system⁴ after which if the temperature of the chamber increases more then the threshold a buzzer would buzz after 1 min after the temperature went above the room temperature

The system should work on battery and for 1 year battery should not get over and for 3 years the device should work .The total amount that has given is 30 dollars I need to design a system that is produced in mass I don't need calibration that we do in prototype.

Please help me to get this designed