G3FE HENF452697R1
G3FE HENF452697R1透气实验表压传感器是通过感受测试介质和大气压力差值输出差分的信号。若传感器透气性不好，使传感器内外存在明显压差，将导致传感器在不同的海拔高度下测试输出有明显差异。
通过低气压试验箱进行透气性试验，在海平面和海拔7 620m 高度下分别进行传感器性能测试，测试结果及对比结果见表1。结果表明从海平面到海拔7 620m传感器输出信号变化较小。说明在从海平面到高海拔过程中，传感器内部气体的大气压力也随着海拔高度的升高而发生改变，只有当传感器内部气体压力与外界环境气体压力相等时，才能使得传感器的表压输出信号不发生改变。实验证明海拔高度升高过程，传感器内部气体可自由出入传感器，因此可证明材料透气性良好。2.2 防水实验2.1 Air permeability test
The gauge pressure sensor outputs a differential signal by sensing the difference between the test medium and atmospheric pressure. If the air permeability of the sensor is not good, there is a significant pressure difference between the inside and outside of the sensor, which will lead to a significant difference in the test output of the sensor at different altitudes.
The permeability test is carried out through the low pressure test chamber, and the sensor performance test is carried out at sea level and altitude of 7620 m. The test results and comparison results are shown in Table 1. The results show that the output signal of the sensor changes little from sea level to 7620m above sea level. It shows that during the process from sea level to high altitude, the atmospheric pressure of the gas inside the sensor also changes with the elevation. Only when the pressure of the gas inside the sensor is equal to the pressure of the external environment gas, can the gauge pressure output signal of the sensor not change. The experiment proves that the gas inside the sensor can enter and exit the sensor freely when the altitude rises, so it can prove that the material has good permeability. 2.2 Waterproof test
