The โMasimo S503-490โ is a disposable SpO2 sensor designed for adult use. It is specifically engineered to work with Masimo monitors to deliver accurate and reliable readings of a patientโs oxygen saturation levels. This sensor is intended for single-patient use, ensuring hygiene and minimizing the risk of cross-contamination. It is sold in a box of 20, making it a cost-effective choice for healthcare facilities. Whether youโre monitoring patients in a hospital, clinic, or home health care setting, the โMasimo S503-490โ SpO2 sensor provides the dependability you need.