Epoxy Thermistors
Last Updated: April 1, 2025
Description
Epoxy thermistors are temperature-sensitive resistors that are coated with an epoxy material. This coating provides them with a protective layer that enhances their performance by offering precision accuracy and a fast thermal response time. These thermistors are typically used for temperature measurement, control, and compensation.
Working Principle
Epoxy thermistors operate based on the principle that their electrical resistance changes with temperature. Specifically, they are often negative temperature coefficient (NTC) thermistors, meaning their resistance decreases as the temperature increases. This characteristic allows them to be highly sensitive to temperature changes, making them useful for precise temperature monitoring and control. The epoxy coating helps in maintaining the integrity of the thermistor by protecting it from environmental factors, thus ensuring reliable performance.
Applications
Epoxy thermistors are used in a variety of applications where precise temperature control is crucial. They are commonly found in temperature measurement devices, control systems, and compensation circuits. Specific examples include their use in hand-held meters and temperature gauges, where their fast response time and accuracy are essential for reliable readings.
Advantages over other Thermistors
Epoxy thermistors offer several advantages over other types of thermistors. They provide a fast thermal response time and precision accuracy, which are critical for applications requiring quick and reliable temperature measurements. Additionally, their epoxy coating makes them suitable for environments where protection from moisture and other environmental factors is necessary.
Limitations
Despite their advantages, epoxy thermistors have some limitations. They are generally not suitable for extreme temperature environments due to the properties of the epoxy coating, which is designed for lower temperature applications. Additionally, they may exhibit non-linearity in their resistance-temperature relationship, which can complicate their use in certain precise applications.
Considerations
When considering the use of epoxy thermistors, several factors should be taken into account. The initial cost of these thermistors can be higher compared to other temperature sensing devices. However, their high degree of stability and accuracy can offset this cost in applications where precision is paramount. Operating expenses are generally low, but the durability of the epoxy coating should be considered, especially in harsh environments. Maintenance and replacement costs are typically minimal, but the specific application and environmental conditions can influence these factors.
from TE Connectivity
Body Features. Wire Connection : Open End. Dimensions. Discrete NTC Wire Length (MM) : 76. Packaging Features. Discrete NTC Package : Epoxy Radial Discrete. Product Type Features. Discrete NTC Sensor Type : Epoxy Coated NTC Thermistor. Tolerance β-Value (PCT)... [See More]
- Coating: Epoxy
- Resistance (@25°C): 10000
- Temperature Range: -55 to 90
- Length: 2.99
from TE Connectivity
Body Features. Wire Connection : Open End. Dimensions. Discrete NTC Wire Length (MM) : 76. Product Type Features. Discrete NTC Sensor Type : Epoxy Coated NTC Thermistor. Tolerance β-Value (PCT) : ±0.8. Signal Characteristics. 25/85 Beta Value (K) :... [See More]
- Coating: Epoxy
- Resistance (@25°C): 1000
- Temperature Range: -40 to 100
- Length: 2.99
from TE Connectivity
Body Features. Wire Connection : Open End. Dimensions. Discrete NTC Wire Length (MM) : 76. Packaging Features. Discrete NTC Package : Epoxy Radial Discrete. Product Type Features. Discrete NTC Sensor Type : Epoxy Coated NTC Thermistor. Tolerance β-Value (PCT)... [See More]
- Coating: Epoxy
- Length: 2.99
- Temperature Range: -55 to 70
from TE Connectivity
Body Features. Wire Connection : Open End. Dimensions. Discrete NTC Wire Length (MM) : 76. Packaging Features. Discrete NTC Package : Epoxy Radial Discrete. Product Type Features. Discrete NTC Sensor Type : Epoxy Coated NTC Thermistor. Tolerance β-Value (PCT)... [See More]
- Coating: Epoxy
- Resistance (@25°C): 300
- Temperature Range: -40 to 150
- Length: 2.99
from TE Connectivity
Body Features. Wire Connection : Open End. Dimensions. Discrete NTC Wire Length (MM) : 77. Packaging Features. Discrete NTC Package : Epoxy Radial Discrete. Product Type Features. Discrete NTC Sensor Type : Epoxy Coated NTC Thermistor. Tolerance β-Value (PCT)... [See More]
- Coating: Epoxy
- Resistance (@25°C): 2252
- Temperature Range: -55 to 90
- Length: 3.03
from TE Connectivity
Body Features. Wire Connection : Open End. Dimensions. Discrete NTC Wire Length (MM) : 610. Packaging Features. Discrete NTC Package : Epoxy Radial Discrete. Product Type Features. Discrete NTC Sensor Type : Epoxy Coated NTC Thermistor. Tolerance β-Value (PCT)... [See More]
- Coating: Epoxy
- Length: 24.02
- Temperature Range: -55 to 70
from TE Connectivity
Body Features. Wire Connection : Open End. Dimensions. Discrete NTC Wire Length (MM) : 76. Product Type Features. Discrete NTC Sensor Type : Epoxy Coated NTC Thermistor. Tolerance β-Value (PCT) : ±0.8. Signal Characteristics. 25/85 Beta Value (K) :... [See More]
- Coating: Epoxy
- Resistance (@25°C): 3000
- Temperature Range: -55 to 90
- Length: 2.99
from TE Connectivity
Body Features. Wire Connection : Open End. Packaging Features. Discrete NTC Package : Epoxy Radial Discrete. Product Type Features. Discrete NTC Sensor Type : Epoxy Coated NTC Thermistor. Tolerance β-Value (PCT) : ±0.8. Signal Characteristics. 25/85 Beta... [See More]
- Coating: Epoxy
from TE Connectivity
Body Features. Wire Connection : Open End. Dimensions. Discrete NTC Wire Length (MM) : 100. Packaging Features. Discrete NTC Package : Epoxy Radial Discrete. Product Type Features. Discrete NTC Sensor Type : Epoxy Coated NTC Thermistor. Tolerance β-Value (PCT)... [See More]
- Coating: Epoxy
- Resistance (@25°C): 10000
- Temperature Range: -55 to 70
- Length: 3.94
from TE Connectivity
Body Features. Wire Connection : Open End. Dimensions. Discrete NTC Wire Length (MM) : 900. Packaging Features. Discrete NTC Package : Epoxy Radial Discrete. Product Type Features. Discrete NTC Sensor Type : Epoxy Coated NTC Thermistor. Tolerance β-Value (PCT)... [See More]
- Coating: Epoxy
- Length: 35.43
- Temperature Range: -55 to 90
from OMEGA Engineering, Inc.
Thermistors are manufactured from oxides of nickel, manganese, iron, cobalt, magnesium, titanium and other metals. All are available epoxy encapsulated and color coded, with two 3" leads.Thermistors with 0.2 C interchangeability also are available encased in a 2" long waterproof PFA tube; order by... [See More]
- Coating: Epoxy
- Resistance (@25°C): 2252 to 30000
- Temperature Range: -62 to 150
- Thermal Time Constant: 2.5
from U.S. Sensor
U.S. Sensor offers a wide selection of NTC thermistors for a variety of applications in industries such as automotive, food handling and processing, telecommunications, medical and scientific research, military/defense, and consumer electronics where accurate temperature measurement and control are... [See More]
- Coating: Epoxy
- Beta: 2930 to 4140
- Resistance (@25°C): 100 to 100000
- Dissipation Constant: 3
from Selco Products Company
Featuring accuracies ranging from ± 0.1 °C to ± 10%. Our CP and CS NTC thermistor series can be customized to meet your exact application requirements for probe housing materials, lead wire gauges, insulation types, and connectors. Selco ’s discrete thermistor family includes... [See More]
- Coating: Epoxy
- Resistance (@25°C): 2252 to 1.00E6
- Temperature Range: -50 to 250
- Package / Electrode Type: Bead; Chip/Surface