What Is the Compatible Masimo 2503 M-LNCS TC-I Ear Clip Sensor?

The Masimo 2503 (M-LNCS TC-I) compatible adult ear clip SpO2 sensor (IPR SKU SS-007RB-AE10) is a reusable earlobe sensor for Masimo SET-equipped devices that use the M-LNCS sensor interface. It is a compatible aftermarket replacement, not an OEM Masimo product, built to match the M-LNCS TC-I connector, adult patient sizing, and ear placement of the original. The 3.3 ft (1.0 m) cable ends in an M-LNCS connector. That connector attaches to the monitor through an M-LNCS-compatible patient cable such as a Masimo rainbow RC-series or M-LNC cable. M-LNCS and standard LNCS connectors are not interchangeable without an adapter, so confirm your device’s interface before ordering.

Compatible Monitor Models

This compatible ear sensor works with the Physio-Control Lifepak 15, Biolight BLT A6, BLT A8, M8500, Q3, Q6, and Q7 monitors, the Masimo Radius-7, and the Welch Allyn Connex Spot 75MT-B. On devices with a 20-pin Masimo Red or rainbow port, the sensor connects through an M-LNCS patient cable. It also works with other Masimo SET devices that accept M-LNCS sensors through the correct patient cable.

Design and Construction

The sensor uses a lightweight clip that attaches to the earlobe, with the emitter and detector facing each other through the tissue. Ear placement is a practical alternative when finger sites are unavailable or unreliable, such as with hand injuries, burns, restraints, nail polish or artificial nails, or a patient who keeps moving their hands. It is sized for adult patients weighing more than 66 lbs (30 kg). The 3.3 ft (1.0 m) cable ends in an M-LNCS connector. The sensor is reusable and supplied one per bag.

When to Replace Your Ear Clip SpO2 Sensor

Reusable ear sensors wear with repeated cleaning and handling. Replace the sensor if the clip loses tension and no longer holds the earlobe securely, the emitter or detector windows are scratched or discolored, the clip housing is cracked, the M-LNCS connector is damaged, or the cable jacket shows cuts or kinks. Frequent “sensor off” alarms, weak signal, or readings that drop out when the patient moves their head are also signs the sensor needs replacing. Stocking an ear sensor alongside finger sensors gives clinicians a backup site without having to wait on a supply request.

Cross Reference and Interchange Part Numbers

This compatible sensor cross-references to Masimo 2503 (M-LNCS TC-I), Draeger MP02983, and GE Healthcare 2068423-064. The aftermarket interchange number is Praymed PSG0426-S. Use these numbers to match the sensor against your inventory records, purchase history, or equipment service documentation.

Why Source Masimo-Compatible SpO2 Sensors from IPR Medical?

IPR Medical is an ISO 9001:2015-certified independent service organization that buys, sells, repairs, and stocks parts for infusion pumps and patient monitoring equipment. Compatible reusable SpO2 sensors give hospitals, EMS agencies, and materials managers a cost-effective way to keep Masimo-equipped monitors and defibrillators in service without paying OEM pricing. We also stock compatible M-LNCS patient cables and finger sensors, so you can source a complete SpO2 setup in one order. Our team can confirm fit against your device before you order. We also offer in-house repair services, replacement parts, and refurbished equipment.

IPR Medical buys, sells, repairs, and stocks parts for the Masimo 2503 M-LNCS TC-I Ear Clip SpO2 Sensor. Contact us at 855-477-8866 or cs@iprmed.com.

Trademark Notice: This is a compatible aftermarket product. It is not manufactured, sold, licensed, or endorsed by Masimo, or any other manufacturer or supplier named on this page. Masimo, LNCS, and all other brand names, model names, and part numbers shown are trademarks of their respective owners and are used on this page only to identify the equipment this product is compatible with and the OEM parts it can replace, consistent with nominative fair use. IPR Medical is an ISO 9001:2015-certified independent service organization; references to OEM equipment describe the equipment we sell, service, and support, and do not indicate any affiliation with, sponsorship by, or endorsement from its manufacturer.