A disposable blood pressure monitor pressure sensor that provides an accurate, linearly related voltage output to the external sensed pressure. The product is a sensor specifically designed for disposable medical instruments, especially for invasive blood pressure monitoring (Invasive Blood Pressure Monitor). The product consists of medical industry-standard materials: a disposable injection-molded housing for direct contact with blood, a laser-corrected and calibrated thick-film resistor-attached ceramic substrate, a dielectric isolation gel, and a miniature silicon piezoresistive pressure sensing chip. The miniature silicon piezoresistive pressure sensing chip is manufactured using the world's most advanced all-silicon pressure sensor process, making the sensor chip a world-leading and domestic leader in terms of performance.