Combined pressure and temperature sensors are widely used in gas engine because they can monitor gas temperature and pressure at the same time. In order to ensure the efficient and safe operation of gas engine, it is necessary to accurately grasp the state of the internal gases, which requires NTC thermistor to help the temperature monitoring of the combined pressure and temperature sensor and provide reliable operation guarantee.

The combined pressure and temperature sensor mainly includes NTC thermistor, pressure sensor, terminals, connector, sleeve, sealing rings, housing and other components. Among them, the NTC thermistor is located in the sleeve and is used for temperature monitoring of the gas; The pressure sensor receives the pressure signal from the sleeve in the cavity to achieve pressure monitoring. As the gas inside the gas engine flows through the front end of the combined pressure and temperature sensor, the resistance value of the NTC increases/decreases according to the change in the temperature of the gas, and this data is transmitted to the processing unit through the connected circuit which is then converted into a temperature reading. When the thermistor detects an abnormal increase/decrease in gas temperature beyond a preset threshold, the temperature signal is converted to an electrical signal and a standard voltage or current signal is output after conversion and calibration by the circuit. These signals are transmitted to the engine control system to trigger a protection mechanism against damage or safety hazards caused by extreme temperature conditions. For example, too low a temperature can cause the inside of the gas tank to freeze, blocking the flow of gases; Excessive temperature can accelerate the aging of materials and even cause accidents such as fires.

The combination of NTC thermistor and pressure sensor not only improves the space utilization rate of the combined pressure and temperature sensor, but also provides reliable data support for the comprehensive monitoring and control of gas engines, realizes accurate monitoring of gas temperature and pressure, and improves the operation efficiency and stability of the engine. Due to the high ambient temperature of the gas engine, EXSENSE Electronics Technology Co., Ltd. recommends the use of our VT series automotive NTC thermistor. That:

First, the conventional working temperature is -40℃~150℃ (up to 180℃ in a short time), which can adapt to the long-term high-temperature working environment of the engine;

Second, the high accuracy of the thermistor can assist the accurate temperature monitoring of the combined pressure and temperature sensor to ensure that the quality and status of the engine gas are stable;

Third, automotive NTC thermistor supports size customization to meet the specific needs of customers for non-standard solutions for combined pressure and temperature sensor.