The XK300 reads resting heart rate and breathing from the wall, through bedding, a reading every few seconds, all night, with nothing worn. FDA-cleared since 2021. In hospitals, nursing homes, home care and correctional facilities across seven countries.
How the sensor reads you: the chest rising with each breath, moving with each heartbeat.
One radar, three forms: the XK300 on the wall or ceiling of a facility, the XK300 Essence in the home with its communication module, the XK300-H on a bedside table. The products.
It learns each person's own resting heart rate and breathing, night after night. Then it compares each night with theirs, not with a population chart. That is what the Probability of Baseline Change (POBC) expresses.
Illustrative. Sixty nights of one person. The shaded band is their own usual. The last ten nights sit outside it.
Patrick and Clair both read 78 last night. Against their own nights, only one of them is unusual.
Illustrative. Thousands of resting readings a night, each compared with that person's own recent nights. POBC expresses how far tonight sits from their usual; the dashboard shows it in neutral words: higher, similar, lower.
Everything in between is unobserved. Continuous, contactless vital signs fill the gap without adding a task to anyone's shift.
Same patient, same day. The rounds miss the change until the next one. In the continuous record the change is visible hours earlier. Illustrative.
Two nights can average the same breaths per minute and feel nothing alike. The sensor keeps the spacing between breaths, not just the count.
Both nights average fifteen breaths a minute. Only the rhythm differs. Illustrative. The film below explains it.
How clean and regular each heartbeat looks to the radar, tracked against your own nights. Investigational, part of an ongoing study with cardiology hospitals, and a global clinical trial is under way.
Strength and rhythm, read from chest movement. Illustrative. A wellness measure, not a medical one. The film below explains it.
Heartbeat Clarity runs from 0 to 1. A healthy, regular heartbeat resolves cleanly, near the top of that range. In the care-setting record, readings of 0.1 or lower have shown a strong association with the heartbeat patterns seen in heart failure. That observation is part of ongoing discovery and research with cardiology hospitals. It is not a cleared measurement, it does not diagnose anything, and Somily does not act on it. It is why the reading is worth having.
A watch estimates heart rate from the pulse at the wrist. The XK300 measures the heartbeat as movement of the chest wall, with nothing on the patient. That is what makes Heartbeat Clarity possible: how cleanly and regularly each beat resolves, all night, every night. The breathing waveform comes with it, so breathing-rate variability follows too. Two and a half minutes on what they are and why they matter to a care team.
Breathing-rate variability is a trend feature; Heartbeat Clarity is investigational and not a cleared measurement. More on the science page.
The XK300 has been in hospitals, nursing homes, home care and correctional facilities since 2021, across seven countries. What follows is what the record showed, reviewed afterwards, and how to read it.
Everything below is a look back at records from care settings where the clinical XK300 was in use. It is part of an ongoing discovery and research programme, and we show what we found. "Days before" is the interval between a shift in a person's own readings and the date the diagnosis was recorded, averaged across events and measured after the fact. None of this is a claim that any Kardian product detects, predicts or diagnoses a condition, and no such use is cleared. The heart failure work is a small study in progress. XK does not predict or diagnose health events.
108 confirmed events. Read the study
189 events in our retrospective analysis. The protocol and the outbreak case were published in Gerontology and Geriatric Medicine, 2024.
390 journeys, reviewed afterwards. Read the case study
A number from 0 to 1 for how cleanly and regularly each heartbeat resolves in the chest-wall movement the radar reads. Strong, even beats read near 1. Weak or uneven beats read low. It is not heart rate, and it is not an ECG.
What we have seen so far: in our February 2026 retrospective analysis of 28 documented heart failure events, the pattern matched in 73.2% of them, and Heartbeat Clarity had dropped to 0.1 or lower in every one. A small sample. It is part of an ongoing discovery and research study, and a global clinical trial is under way. We are showing what we found, not claiming that any product detects, predicts or diagnoses heart failure. Heartbeat Clarity is investigational and not a cleared measurement. Heart failure, in full.
Retrospective findings from the clinical XK300 in nursing homes, and published work: the average interval between a shift in readings and the recorded diagnosis, measured after the fact. Part of ongoing discovery and research. Not cleared indications, and not claims. XK does not predict or diagnose health events.
Radar physics in plain words, the peer-reviewed accuracy studies, FDA and international clearances, the outcomes record, and what we still do not have. Every figure names its source.
Read the science
In-patient beds and heart failure
Managed in the home
Skilled nursing, memory care, assisted and independent living
Prescribed, delivered, read by your team
Cells and holding areas
Psychiatric and secure units
Sustained Unconscious Human Occupant
The Kardian dashboard: every resident, every night, beside their own baseline.
Resting heart rate, resting breathing rate and the breathing waveform, all night, for every bed with a sensor.
Each person's own recent nights, and how far last night sits from them, in plain words and with the number behind a click.
Ranges you set and baseline changes, delivered to the dashboard, by email or into your systems. Not an alarm system for acute life-threatening events.
In bed, out of bed, restlessness at rest and time asleep, as context for the night.
The Kardian dashboard for care teams, Kardian Health Insights for programmes, and a public API and webhooks for your own systems and EHR. Details.
No camera, no microphone. Only vital-sign data leaves the room. Regional and on-premises deployments are available where data must stay in country.
| 7.3 GHz ours | 24 GHz | 60 GHz | 122 GHz | |
|---|---|---|---|---|
| Wavelength | ~41 mm | ~12 mm | ~5 mm | ~2.5 mm |
| Through a duvet | Yes | Degraded | Degraded | Degraded |
| A reading arrives | Every 3 seconds | After the session | Daily average | 5-minute average |
| Reaches a human | Real time | Next morning | Retrospectively | 4-hour mean |
| Breathing waveform | Exported | No | No | No |
From the manufacturers' own FDA summaries and instructions for use, August 2026. Labels compared, not capabilities; no manufacturer is named.
XK does not predict or diagnose health events. The sensor is a source of information for clinicians, not a decision.
Dr. Serrano is a physician whose facilities use the clinical XK300. Precious Myers Brown runs facilities that use it. Larry and Susan have lived with the sensor at home for months. Each speaks from their own experience; none was scripted.
The XK300 family is FDA-cleared (510(k) K202464, 2021) as a Class II device for measuring heart rate and respiration rate in adults, including in nursing homes and home healthcare. It is not an alarm system for acute life-threatening events, and it does not diagnose. Everything shown as early notice on this site is a retrospective finding, not a cleared indication.
On the wall above the head of the bed, on the ceiling in secure settings, or on a nightstand in the XK300-H form. Power and a network connection; no wearable, no pairing per patient. Our team installs the first sites; facility staff install roll-outs with our guide, in minutes per room.
The sensor reads the closest body. One sensor per bed, mounted on that person's side. If it picks up two sets of vital signs at once it pauses rather than mixing them. With six to ten thousand readings a night, a brief pause changes nothing.
You set ranges per person or per programme, and baseline-change notifications follow the Probability of Baseline Change. They reach the dashboard, email, or your own systems by API or webhook. They are configurable notifications for a care team, not an alarm system.
Yes, through the Kardian public API and webhooks; several customers pull readings into their own platforms. Tell us what you run and we will scope it.
Regionally, with deployments per country or region and on-premises options where data must stay in country. No camera, no microphone; only vital-sign data leaves the room.
Pricing is quoted per programme: number of beds or homes, term, hosting and integration. There is no public price list. Tell us about your setting and we reply within a working day.
Yes. The XK300 Essence is prescribed and supplied through RPM programmes; the patient-facing explanation is at www.kardian.com. Kardian Somily is a separate wellness product individuals can buy themselves; it is not the cleared device.