About Nanjing Shiheng Electronics Established in 2002, we are a private high-technology enterprise . We specialize in the production of a series of heating elements, including negative temperature coefficient (NTC) thermistors, NTC sensors, positive temperature coefficient (PTC) thermistors and zinc-oxide voltage-dependant resistors. ISO 9001:2000- and ISO 14001-certified Facilities In our modern workshops, we have large-scaled automatic production facilities, standardized measuring and testing instruments, and a strict quality control system. We have received ISO 9001:2000 and ISO 14001 certifications. Our main products are MF72 power thermistors and MF52 temperature measurement and control thermistors, both of which have been certified by CQC and UL. Monthly Capacity of Almost 50,000,000 Heating Elements Contact Us If you are interested in any of our products, please feel free to contact us for further information. We look forward to cooperating with you in the future. Browse our showroom to see what we have for you and then e-mail us today.