Therma Klear Flex series thin flexible transparent heaters provide heat to extend the operating temperature of LCDs in environments from 0°C to below -40°C. The heaters employ Dontech’s VCF Series visually transparent conductive coatings applied to flexible optical grade polyester. Custom substrates are also available. Conductive coatings are single or multiple-layer, thin film deposited coatings with a resistance from 5? to 200?/sq. The heaters typically measure 0.007” thick and custom sizes are available up to a 24” diagonal and with an optical grade pressure sensitive adhesive for optical coupling purposes. DONTECH INC., Doylestown, PA. (215) 348-5010.