watttron’s heating pixels are resistance heating circuits—typically 5 x 5 mm in size—applied to thin, electrically insulating ceramic substrates using a screen-printing process. Each pixel also serves as a temperature sensor. The pixels are arranged in modular arrays and controlled via integrated electronics and a graphical user interface. A closed-loop feedback control system enables each pixel to maintain an accuracy of ±1 K and achieve heating rates of up to 10 K/s at power densities of up to 22 W/cm2.