Epoxy and Thermistor Protections

Epoxy is frequently used to protect NTC thermistors that can be damaged and impair performance. Chemical characteristics that are needed to safeguard thermistors are abundantly found in high-strength epoxy. Industrial grade epoxy offers strong thermal conductivity and high dielectric strength.


Thermistors that are coated in epoxy will have a teardrop shape that has a bead and two radial wire leads. These thermistors are frequently found in environments and applications where moisture is present. An epoxy coated NTC thermistor can commonly be found inside of medical devices that are used to measure air temperature and air flow. They are also used in automotive applications that are designed to control and monitor seat warming features and internal air conditioning. It is not uncommon to find epoxy bead thermistors in green energy devices like wind turbines because of the damaging conditions in colder climates. When turbines encounter freezing rain, and below freezing temperature, blade icing will reduce power and increase rotor loads. An NTC thermistor probe monitors and controls the temperature of blades, which allows systems to have quickly responding on/off controls.


Epoxy is frequently used because:

  1. It adds substantial physical protection for thermistors
  2. It functions as an electrical insulator

For more information on bead type, epoxy coated NTC thermistors; you should give our team a call today.


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