I am developing a heating application where temperature need to be constant. I am planning to set the temperature @ 200 degree C. when my sensor find the temperature exceeding the set temperature how can i reduce the temperature of the heating element. I currently plan to cut the supply to heating element but is there any other method which i can reduce the temperature.
How to control the temperature of heating element
rtdsensortemperaturethermalthermistor
Related Solutions
High temperature LEDs do exist in SMD form factors: Look for LEDs with full ceramic substructure and high temperature bonds (typically silver or silver-plated). These are designed to withstand temperatures up to and above 125 degrees Centigrade.
One such example is the ROHM PSL01 LED, that is rated for operation up to 130 degrees C.
I think a bimettalic element, a start switch and a relay is what you need. The relay will use one of its contacts to short the switch so that after pressing the switch, the relay becomes latched and powers the heating element. The bimettalic strip will disconnect the relay coil when temperature is reached. You can only reactivate providing the temperature has dropped below the bimettalic switch's lower threshold AND you press the switch.
Best Answer
Practically you have two main choices involving i) on/off control; ii) average control.
i) Hysteretic control turns the heater on at a lower limit and turns it off at an upper limit. (i.e. on/off).
ii) Drive the heater with a fast switching PWM signal (via Switches and a switch-driver) so that the average value of the temperature is your desired setpoint value. This usually involves feedback and a controller such as a PID.