Omega EngineeringOMEGALUX® QG Series heaters use a solid black Ceran™ glass as the emitter face. Maximum power output is 20 watts/square inch with a maximum operating temperature of 1600°F (870°C) on the face. An optional thermowell from the back of the heater allows for a spring-loaded thermocouple to measure face temperature. This is the best way to use direct temperature control. The heater is available in sizes from 6 x 12 inches up to 24 x 24 inches. The QG Series is ideal for medium-power application requiring a cleanable heater surface.