Great chance to buy 200 of these EPCOS PTC Thermsitors Product Details PTC Over-temperature Protection These devises can be connected in series (an open circuit being fail safe) so that several monitoring points may be applied to equipment using one detector circuit Probe type: insulated metal housing with M3 male threaded fixing Sensor type: encapsulation PTC pellet with PTFE insulation Working voltage 30Vdc for 0 to 40°C Applications Limit temperature sensor Features Insulated screw-type metal case Thread M3 Tinned leads Marked with nominal threshold temperature and type designation Characteristics for nominal threshold temperatures TNTT = 90 to 120 °C conform with DIN 44081 Fast response due to small dimensions RoHS-compatible SPECIFICATION Maximum Temperature Sensed +103°C Minimum Temperature Sensed -40°C Probe Diameter 9.3mm Probe Length 13mm Thermistor Type PTC