The thermal management of automobile engine is directly related to fuel efficiency, emission control and service life, with the water temperature sensor playing a key role as a “thermometer”. The NTC thermistor, as the core component of the water temperature sensor, assists in temperature monitoring through its characteristic of an inverse relationship between temperature and resistance value, ensuring the normal operation of the automobile engine.

When the automobile engine is running, the NTC thermistor built into the water temperature sensor is electrically connected to the temperature processing module, converting temperature data into electrical signal and transmitting it to the engine ECU. The NTC is typically installed at the water inlet and outlet of the automobile radiator, where it conducts real-time temperature monitoring while the engine operates steadily, ensuring that the coolant temperature remains consistent under different operating conditions. Given that the NTC plays a vital role in temperature sensing for the automobile engine water temperature sensor, how can it meet the needs of various manufacturers in terms of selection? EXSENSE recommends the VT series automotive NTC thermistor, which features:

1.High accuracy establishes temperature sensing standards

Automotive NTC thermistor has a measurement accuracy of ±1%, allowing the water temperature sensor to efficiently measure the coolant temperature and provide precise temperature data to the engine, enhancing operational efficiency. For instance, under low-temperature conditions, the engine can increase fuel injection based on the water temperature signal provided by the NTC to ensure normal vehicle start-up. And during condition of normal junction temperature, the engine maintains a great air-fuel ratio to optimize combustion efficiency better.

2.High-temperature withstand to cope with harsh engine environment

Automotive NTC thermistor can monitor temperature over a wide range from -55℃ to 150℃, effectively meeting the coolant monitoring needs of automotive engines under complex conditions like cold start, idling, high-speed driving, etc. Additionally, the high-temperature withstand properties of the NTC ensure excellent aging stability, effectively reducing signal drift rate and maintaining long-term stable operation of the engine.

3.Excellent sensitivity achieves rapid response during operation

Automotive NTC thermistor has a fast thermal response speed, helping the water temperature sensor quickly acquire coolant temperature and allowing the engine to timely adjust operational parameters in response to various condition changes. Especially on city roads with frequent starts and stops, the assistance of NTC can prevent engine from overheating, ensuring it operates efficiently at all times.

As a carrier, the water temperature sensor converts the temperature sensitive characteristic of NTC thermistor into practical basis for temperature monitoring; While the engine, as the ultimate service recipient, relies on them to optimize its working state. Therefore, with the addition of EXSENSE VT series automotive NTC thermistor, water temperature sensor can better monitor the heating state of the engine and provide more accurate temperature information to its ECU.