PTC thermistor temperature probe 1K 2K 3K 5K 10K 20K 50K temperature control sensor two wire system|Sensors| - AliExpress
Johnson Controls A99bb-200c Ptc Silicon Sensor With Pvc Cable,-40 To 212 Degree F Temperature Range,6-1/2' Cable Length - Buy Ptc Sensor,Mz6,Ptc Tempeature Controlled Product on Alibaba.com