What is the effect of temperature on the measurement accuracy of PP diaphragm pressure gauge

The mechanism of temperature's influence on measurement accuracy plays a crucial role in the performance of pressure gauges, especially PP diaphragm pressure gauges. Its core component, the diaphragm, is usually made of polymer materials such as polypropylene (PP). Such materials have significant differences in thermal expansion coefficients from traditional metal materials, which may cause changes in the matching relationship between the diaphragm and the transmission mechanism when the temperature changes, thereby causing measurement errors.

As the temperature changes, the elastic modulus of the polypropylene material will also change accordingly. The elastic modulus is an important parameter for measuring the material's ability to resist elastic deformation. When the temperature rises, the elastic modulus of the PP material decreases, which reduces the stiffness of the diaphragm, which directly affects the measurement accuracy. On the contrary, when the temperature decreases, the elastic modulus increases and the stiffness of the diaphragm increases, which also affects the measurement results. In addition, temperature changes may also cause thermal stress inside the pressure gauge, which in turn causes slight deformation of the components. Although these deformations may be insignificant, they are enough to significantly affect the measurement accuracy, especially in extremely high or low temperature environments.

In addition, PP diaphragm pressure gauges are usually used to measure the pressure of gases or liquids, and the properties of these fluid media such as volume, density and viscosity also change with temperature. For example, when the temperature rises, the volume of the gas or liquid expands, which may cause the pressure gauge to measure too high; while when the temperature drops, the measurement result may be too low. These factors work together to make temperature an important variable that affects the measurement accuracy of the PP diaphragm pressure gauge.

In response to the impact of temperature on the measurement accuracy of the PP diaphragm pressure gauge, JRL has adopted a series of effective response strategies. First, in terms of material selection and optimization, JRL fully considered the performance parameters such as the thermal expansion coefficient and elastic modulus of the material, and selected polypropylene material with a low thermal expansion coefficient and stable elastic modulus as the main material of the diaphragm. At the same time, the company also improved the heat resistance and low temperature resistance of the material through advanced material modification technology, thereby enhancing the overall reliability of the product.

Secondly, in order to eliminate the impact of temperature changes on measurement accuracy, JRL introduced temperature compensation technology in the PP diaphragm pressure gauge. This technology can monitor the changes in ambient temperature in real time and automatically adjust the parameters of the transmission mechanism to maintain the stability of measurement accuracy. This innovative design ensures that the PP diaphragm pressure gauge can achieve high-precision measurement under various temperature conditions, greatly improving the applicability of the product.