Pulses of electric current applied to the heating elements are modulated with pulse width modulation to adjust the temperature within the chamber in response to {HEAD ~ signals} emitted by {TAIL ~ a temperature sensor} located within the chamber 
Pulses of electric current applied to the heating elements are modulated with pulse width modulation to adjust the temperature within the chamber in response to { HEAD ~ signals } emitted by { TAIL ~ a temperature sensor } located within the chamber
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH