PTC EGT Sensor

In what systems are NTCEGT sensors commonly used?
1. Automotive Exhaust Temperature Monitoring

NTCEGT sensors are installed on the engine's exhaust manifold or exhaust pipe to measure exhaust temperature in real time, helping the engine control unit (ECU) optimize fuel injection, ignition timing, and emissions control.
2. Heating, Ventilation, and Air Conditioning (HVAC) Systems

In appliances such as air conditioners and water heaters, NTC sensors are used to detect room or hot water temperature, enabling energy-saving control and comfort adjustment.
3. Industrial Process Control

NTCEGT sensors are often used in heat treatment on production lines, furnace temperature monitoring, and temperature feedback in chemical processes. Their high sensitivity and reliability ensure process stability.
4. Other Applications

NTCEGT sensors are also used in marine engines, aircraft engines, and some laboratory test equipment because of their high-temperature gas tolerance and accuracy, meeting the demands of demanding environments.
What is the difference between PTC technology and traditional thermocouples?
1. Working Principle

PTC sensors: Based on a positive temperature coefficient thermistor, their resistance increases as the temperature rises; they are a type of resistive temperature measurement. Thermocouples: Utilize the thermoelectric potential (Seebeck effect) generated by a temperature difference between two dissimilar metals to directly output a voltage signal.
2. Temperature Range and Accuracy

PTCs: Suitable for medium to low temperature ranges between -60°C and 150°C, with relatively high accuracy, especially stable in overheat protection scenarios.
Thermocouples: Offer a wide temperature measurement range (-270°C to 2300°C), but their accuracy is slightly inferior to PTCs in the low-temperature range.
3. Response Speed ​​and Linearity

PTCs: Offer fast response and are nearly linear within a certain range, making them easy to directly map to temperature values.
Thermocouples: Offer extremely fast response, but their output is a nonlinear voltage, requiring cold-junction compensation and linearization.
4. Cost and Application Scenarios

PTCs: Simple in structure and low in cost, they are commonly used in low- to medium-temperature applications such as motor overheat protection and home appliance temperature control.
Thermocouples: Costly in manufacturing, they are suitable for industrial environments with high temperatures, severe corrosion, or those requiring long-distance signal transmission.