日志
Low Drift Thermistors and Thermistor Assemblies
||
When using a thermistor as the temperature sensor, it becomes the most important component for the temperature regulating system. To achieve high system performance, the thermistors should have low short term and long term drifts in the R-T relationship, the resistance vs. the temperature, compact size, and reliable. Some low cost thermistors are coated with epoxy materials and have large short and long term resistance drift, i.e., when sensing the same temperature, the resistance changes with time, causing the system with a wrong sensed temperature, thus, the target object temperature is drifted. Glass coated thermistors, on the other hand, have almost zero short and long term drift, all our thermistors are of this type. When choosing the thermistor for a temperature control system, these are the main specifications to consider: operating temperature range, sensitivity, drift, size, mounting approach, etc. Our thermistors and thermistor assemblies are mainly NTC thermistors, and can be used with our TEC controllers and TEC modules for building high stability low drift temperature control systems. These NTC thermistors and thermistor assemblies have high precision (+/-0.25C@25C), compact size (bare version down to 0.8mm diameter), and are coated with glass material on all the bare thermistors and the thermistor of which the thermistor assemblies are made, resulting in low both short and long term drift. The NTC thermistors come in bare and lugged forms, the former is for point sensing to achieve high accuracy for specific points, such as laser diode die, etc.; http://www.analogtechnologies.com/thermistor.html
