There are so many thermistor manufacturers, how can I choose a high quality sensor?
The element is the key. The PreCon Raw Thermistor Chip is made of metal oxides compressed and heat treated to a coherent nonporous mass. This treatment process is what gives the thermistor its basic curve. The material is trimmed for the proper resistance at 25°C, leads are attached, and various chemical treatments are applied. The sensor is then encapsulated in a plastic cup to become a PreCon ST-R3. During the assembly process the sensors are 100% screened which assures the high interchangeability tolerance and long-term stability for which PreCon Sensors are known. PreCon utilizes a chemical compound more pliable than glass and yet more resistant to moisture than the epoxy used by other manufacturers. This process allows PreCon to warrant their sensors to be free from drift of more than 0.24°F for 5 years. The 8-foot leads attached to the sensor provide isolation from moisture which will destroy a thermistor.
