Whether using MEMS, diffused silicon, sputtered thin film, or ceramic thick-film sensitive materials, pressure sensing elements exhibit changes in zero output and full-scale output due to temperature variations. This phenomenon is influenced by various factors in materials and process manufacturing. The value of this change, converted to the signal's full-scale amplitude VT/V span/t., is known as the temperature zero coefficient. It indicates the change in sensor output per 1°C temperature variation. For example, 0.03%/°C means each degree of temperature affects accuracy by 0.03%. Traditional methods involve sorting and grading products after manufacturing, but this can't ensure the temperature coefficient of an entire batch stays within acceptable limits.
Huaxinlian Technology has introduced the industry's first fully automated laser temperature compensation process. This process includes online temperature coefficient testing and an active laser trimming system to adjust resistance, resulting in a complete range of ceramic pressure sensor cores with temperature coefficients below 0.02%/°C at the component level, filling a domestic gap.
Our company manufactures temperature-compensated ceramic pressure sensor cores with a temperature coefficient below 0.02%/°C in the range of -20°C to +85°C, and below 0.01%/°C in the standard 0-50°C range. This effectively achieves a "zero" temperature drift capability, significantly enhancing product performance and allowing replacement of similar high-end imported pressure sensors, such as those from METELLUX and other brands.