Critical disclosure — read first
MedLinket is not a Masimo licensee. MedLinket does not manufacture, license or replicate any portion of Masimo's SET (Signal Extraction Technology) algorithm, Rainbow multi-parameter signal processing, or any other Masimo proprietary algorithm.
What MedLinket manufactures: cables and sensors that are mechanically and electrically compatible with Masimo connector standards (LNCS, RD-Set, and their variants), and that transmit raw optical photoplethysmogram (red and infrared) signals to a host monitor or Masimo OEM module.
The signal processing — SET signal extraction, low-perfusion detection, motion-artifact rejection and Rainbow multi-wavelength interpretation — runs entirely on the licensed Masimo SET board inside the host monitor.
In plain terms: if your monitor has a Masimo SET board (licensed by Masimo to your monitor OEM), a MedLinket cable plugs into that licensed board and delivers the optical waveform — the SET algorithm in the board does the rest. MedLinket does not, and cannot, reproduce SET-level performance independently.
Quick answer. Masimo's connector family has evolved across several generations, and Masimo SET is licensed into virtually every major patient-monitor OEM. To select the right compatible sensor, answer three questions: which Masimo connector your monitor or standalone unit uses (LNCS, M-LNCS, or RD-Set); the patient type; and whether you need single-parameter SpO2 or multi-parameter Rainbow.
This hub covers SpO2-only LNCS-compatible and RD-Set-compatible sensors — it does not cover Rainbow multi-parameter sensors (SpHb, SpCO, SpMet), which require Masimo's licensed Rainbow board and a Rainbow-specific sensor that MedLinket does not manufacture. Jump to the compatible sensor list.
Masimo connector generations explained
| Connector | Pins | Years common | Notes |
|---|---|---|---|
| LNOP | 8-pin | 1998–2008 | First-generation Masimo connector; mostly obsolete |
| LNCS | 9-pin | 2006–present | Most common — most fleet decisions involve LNCS |
| M-LNCS | 9-pin variant | 2015–present | Backward compatible with most LNCS sensors |
| RD-Set | 20-pin | 2017–present | Required for Rainbow multi-parameter; not interchangeable with LNCS |
| Rainbow | Varied | 2008–present | Multi-parameter SpO2 + SpHb + SpCO + SpMet |
How to identify your Masimo connector
- Look at the SpO2 port: LNCS 9-pin is a round 9-pin connector with a distinctive purple keyway; RD-Set 20-pin is a larger rectangular connector; M-LNCS looks visually identical to LNCS 9-pin and is physically interchangeable with LNCS most of the time.
- Check the existing sensor cable — Masimo OEM cable labels indicate "LNCS," "RD" or "M-LNCS."
- Check the product documentation — for OEM monitors with Masimo SET, the SpO2 configuration line on the original quote specifies "Masimo SET with LNCS" or "Masimo SET with RD-Set."
Compatible sensors by connector — direct links
The range below is the directly-stocked LNCS / M-LNCS family — the dominant Masimo connector in clinical use. All deliver the raw optical photoplethysmogram to your host's licensed Masimo SET board. Confirm your connector generation first (see above); for an RD-Set 20-pin port, see the note at the foot of this section. Browse everything in the Masimo compatible sensors collection.
LNCS reusable & short-cable sensors
All short sensors| OEM cross-reference | Patient / type |
|---|---|
| Masimo LNCS (1864) | Adult finger, reusable / short |
| LNOP DCI (1269) | Adult finger, short cable |
LNCS / M-LNCS disposable sensors by patient
All disposable SpO2| OEM cross-reference | Patient | Style |
|---|---|---|
| Masimo 1859 | Adult | Non-woven adhesive |
| Masimo 4000 | Adult | Adhesive |
| Masimo 1860 | Pediatric | Non-woven adhesive |
| Masimo 4001 | Pediatric | Adhesive |
| Masimo 2328 | Infant | Adhesive |
| Masimo 4002 | Infant | Adhesive |
| Masimo 2514 | Neonate / adult | Adhesive |
| Masimo 4003 | Neonate / adult | Adhesive |
| Masimo 4003 | Neonate / adult | Non-adhesive wrap |
| LNCS Neo | Neonate / adult | Non-adhesive wrap |
| M-LNCS Neo (2516) | Neonate / adult | Non-adhesive wrap |
Masimo SpO2 adapter / patient cables
All SpO2 cables| OEM cross-reference | Configuration |
|---|---|
| M-LNC-10 (2525) | Masimo patient cable, 14-pin, 8 ft |
| 0012-00-1653 | Masimo SpO2 adapter cable |
Which monitor platforms use Masimo SET?
Masimo SET is licensed into virtually every major patient-monitor OEM. When a monitor is ordered with the Masimo SET configuration, it has a Masimo SET board and can accept MedLinket LNCS-compatible sensors:
| Monitor OEM / platform | Masimo SET connector | Platform hub |
|---|---|---|
| Philips IntelliVue MX series | LNCS 9-pin (when specified with Masimo SET) | Philips MX hub |
| Philips IntelliVue MP series | LNCS 9-pin (when specified) | Philips MP hub |
| GE CARESCAPE B series | LNCS 9-pin (when specified) | GE CARESCAPE B hub |
| GE Dash series | LNCS 9-pin (when specified) | GE Dash hub |
| Mindray BeneVision N series | LNCS 9-pin (when specified) | Mindray BeneVision N hub |
| Dräger Vista 120 / 120s | LNCS 9-pin (less common; OxiMax more common) | Dräger Infinity hub |
| Nihon Kohden Life Scope, BSM-6000, SVM | LNCS 9-pin (less common; NK native more common) | Nihon Kohden hub |
| Masimo Radical-7, Radical-95, Rad-87 | LNCS 9-pin or RD-Set 20-pin | this page |
| Masimo Root | RD-Set 20-pin | this page |
To use a MedLinket LNCS-compatible sensor on any of these hosts, the host must have been ordered with Masimo SET — not Nellcor, not the OEM-native technology. See the relevant platform hub for SpO2 technology identification specific to that monitor.
Sensor selection decision matrix
| Patient type / scenario | Recommended sensor | Why |
|---|---|---|
| Adult, fixed bedside (ICU, OR) | LNCS adult finger clip reusable | 200-cycle reusable economy; finger is the standard site |
| Adult, mobile or transport | LNCS adult disposable adhesive | Lower cleaning burden; single patient |
| Adult, finger inaccessible | LNCS multi-site Y sensor reusable | Allows ear or toe positioning |
| Pediatric (10–40 kg) | LNCS pediatric finger clip reusable | Pediatric-sized spring tension |
| Infant (3–10 kg) | LNCS infant soft tip reusable or adhesive wrap | Reusable for fixed ward; wrap for repositioning |
| Neonate (under 3 kg) | LNCS neonate silicone wrap reusable or Ultra-Soft disposable | Rotate site and replace sensor on each 2-hourly rotation |
| Low perfusion (cardiac arrest, vasopressor) | LNCS adult silicone soft tip reusable | Soft tip improves signal contact at low PI |
On low-perfusion and motion-artifact performance: Masimo SET's signal extraction in the host module is what produces low-perfusion SpO2 capability and motion-artifact rejection. A MedLinket compatible sensor provides the optical signal; the SET board provides the algorithm. Sensor fit and placement still matter — a sensor that does not sit firmly on the patient will not give SET the clean signal it needs, and a loose or damaged sensor degrades any algorithm's performance.
Reading path by clinical scenario
Adult ICU (any host with Masimo SET)
LNCS adult finger-clip reusable plus an LNCS extension cable for the monitor-to-bedside distance; replace at 200 cleaning cycles or at signs of wear.
Cardiac surgery OR (Philips MX, GE B850, Mindray N22, etc. with Masimo SET)
LNCS multi-site Y sensor reusable for cases with an inaccessible finger, or LNCS adult soft-tip reusable for low-perfusion robustness, plus an LNCS extension cable. For tested compatibility evidence see the Masimo LNCS on GE CARESCAPE test.
PACU and step-down
LNCS adult disposable adhesive (high turnover lowers the value of cleaning labour), with one reusable per bay as a backup for sensitive patients.
NICU
LNCS neonate silicone wrap reusable for long-stay patients, or the LNCS Neo disposable for 2-hourly single-patient rotation. The clinical rotation protocol is the same on any platform — see the LNCS Neo neonate SpO2 sensor page.
Standalone Masimo Radical-7 / Rad-87 / Root
Verify the connector first — a Radical-7 may be LNCS or RD-Set depending on the year of purchase, and the Root is typically RD-Set. Choose the LNCS or RD-Set sensor range accordingly.
Common procurement pitfalls
- Ordering "Masimo-compatible" without specifying the connector. Identify LNCS vs M-LNCS vs RD-Set before ordering.
- Buying LNCS for an OEM monitor that has Nellcor or OEM-native SpO2, not Masimo SET. The LNCS connector will not physically fit a Nellcor or OEM-native port. Confirm the host monitor's SpO2 technology on the corresponding platform hub.
- Expecting Rainbow multi-parameter measurement from an LNCS-compatible sensor. SpHb, SpCO and SpMet require both a Rainbow-licensed host and a Rainbow-equipped sensor. For Rainbow multi-parameter, purchase the OEM Rainbow sensor from Masimo.
- Mixing M-LNCS and LNCS sensors expecting full interchange. Backward compatibility holds most of the time but can fail on edge cases — when in doubt, photograph the connector.
- Buying RD-Set sensors for an LNCS host, or vice versa. The two are not mechanically interchangeable without a Masimo adapter cable.
- Assuming SET performance from the sensor alone. SET is in the host module, not the sensor — a compatible sensor cannot recover SET-level performance on a monitor without a Masimo SET board.
- Cable damage at the LNCS connector. Train users to disconnect by gripping the connector, not pulling the cable — external cable damage at the strain relief is the largest field-return category.
How to get a configuration review
If you operate a fleet with mixed Masimo connector generations, mixed OEM-platform hosts running Masimo SET, or want to standardise sensor inventory across a multi-vendor environment, MedLinket's configuration team will review your inventory.
Provide your monitor models with Masimo SET, the Masimo connector generation per model, your standalone Masimo units, your patient-type breakdown and your current sensor inventory. There is no obligation to purchase.
Frequently asked questions
Does a MedLinket sensor include the Masimo SET algorithm?
No. SET runs entirely on the licensed Masimo SET board inside the host monitor. MedLinket manufactures connector-and-cable-compatible sensors that deliver the raw optical photoplethysmogram signal to that board — the algorithm, its low-perfusion performance and its motion-artifact rejection are Masimo's, in the host. MedLinket is not a Masimo licensee.
Can I get SpHb or SpCO readings with a compatible sensor?
No. Rainbow multi-parameter measurement (SpHb, SpCO, SpMet) requires both a Rainbow-licensed host board and a Rainbow-equipped sensor with the specific wavelength filter set. MedLinket does not manufacture Rainbow sensors — for Rainbow multi-parameter capability, purchase the OEM Rainbow sensor from Masimo.
Will an LNCS sensor work on a Masimo Radical-7?
It depends on the connector. A Radical-7 may use the LNCS or the RD-Set connector depending on the year of purchase. An LNCS sensor fits an LNCS port; an RD-Set port needs an RD-Set sensor or a Masimo adapter cable. Verify the connector first.
Our procurement policy requires OEM-only sensors — are these suitable?
If your policy requires OEM-only Masimo sensors, these compatible products are not the right choice. If your policy permits compatible accessories meeting equivalent manufacturing and validation standards (ISO 13485, FDA 510(k), CE, MDSAP), MedLinket's LNCS- and RD-Set-compatible sensors offer a documented, audited alternative.
Re-statement: MedLinket is not a Masimo licensee. MedLinket is not affiliated with, endorsed by or licensed by Masimo Corporation. MedLinket manufactures connector-and-cable-compatible sensors that deliver raw optical photoplethysmogram signals to a host monitor's Masimo SET board. The SET algorithm, its low-perfusion performance, its motion-artifact rejection and any Rainbow multi-parameter capability live in the licensed host board — not in the cable. MedLinket does not replicate, reproduce or modify Masimo's signal processing. "Masimo," "SET," "Signal Extraction Technology," "LNCS," "M-LNCS," "LNOP," "RD-Set," "Rainbow," "rainbow SET," "SpHb," "SpCO," "SpMet," "PVi" are trademarks of Masimo Corporation. The use of "LNCS-compatible," "Rainbow-compatible" and OEM part numbers is strictly for connector and mechanical-fit identification, consistent with Magnuson-Moss Warranty Act protections. All MedLinket compatible sensors are manufactured under ISO 13485:2016 (TÜV), ISO 9001, FDA 510(k) clearance, CE marking, MDSAP and MHRA registration, with SpO2 accuracy validated to the ISO 9919:2005 protocol and 100% per-unit electrical continuity QC.
About MedLinket. Founded 2004 in Shenzhen. NEEQ-listed (stock code 833505). Over 20 years specialising in patient-monitoring accessories, with compatibility coverage for the Masimo LNCS and RD-Set connector families across all major monitor OEM platforms. MedLinket is not a Masimo licensee — it makes compatible sensors and cables, while the Masimo SET algorithm and Rainbow signal processing remain Masimo's intellectual property in the licensed host module. FDA 510(k), CE, MHRA, MDSAP, ISO 13485:2016 and ISO 9001 certified. Manufacturing across three production bases under Class 100,000 cleanroom standards. Serving 2,000+ hospitals across 117 countries and regions. Product liability insurance is carried across the product line, with cover up to USD 5 million; distributors may request a certificate of insurance within the policy period.
