... and best service 3)Customized design is availble Electric furnace temperature control device KST803Purposes: It can be widely iron, the ... purpose of on-off circuit. With stable performance, adjustable temperature, high precision temperature control, reliable action and crisp, and high reliability, long life ... enclosure parts. thermosistor KST803 10A/250V ~ (TUV, CQC) freezer temperature control