SENTINEL
When communications fail, SENTINEL keeps broadcasting.
The first wearable physiological monitoring system designed from first principles for dismounted soldiers in denied communications environments. Autonomous. Offline. Always operational.
Every existing system has the same failure mode.
Every physiological monitoring system currently available — clinical, commercial, or military — was designed around a single architectural assumption: that data generated at the sensor will reach an analytics platform, and that alerts generated by the analytics platform will reach a clinician.
Remove connectivity, and the system doesn't degrade gracefully. It stops.
In a peer adversary conflict, communications will be lost. Electronic warfare doctrine specifically targets battlefield communications as a first-order priority. NATO planners are currently modelling conflicts in which EW degrades or destroys battlefield communications across entire operational areas — while MEDEVAC is grounded by contested airspace and dismounted sections operate in isolation for four to six hours.
"No existing physiological monitoring system continues to function when communications are lost. In a peer adversary conflict, communications will be lost. These are not independent statements." — NTL-004 Programme Documentation
The dual-trigger architecture.
Prior art emergency wearable systems use a single trigger — typically a fall or loss of movement. This generates unacceptable false positive rates in operational contexts. SENTINEL requires two conditions to be satisfied concurrently.
Loss of the soldier's issued Android device beyond a configurable timeout. The device must be absent — not merely silent — before this condition is satisfied.
Deviation from the soldier's personalised physiological baseline beyond a configurable threshold. Population averages are irrelevant — only the soldier's own established normal triggers the condition.
The scenarios that don't trigger.
"Soldier whose Android battery died during an extended patrol."
"Soldier who is physiologically stressed from a hard contact."
"Soldier who has been shot, whose Android was destroyed by the same round, and whose physiology is deteriorating."
Everything the medic needs. Instantly.
Encrypted. Broadcast independently of any external infrastructure. Received before the medic can physically reach the casualty.
Authenticated identity transmitted with the emergency payload. The medic knows exactly who is down before visual contact.
Laboratory-verified at enrollment. No clinical delay identifying blood type at point of care.
Blood-borne virus screening status transmitted with each payload. Enables immediate buddy-donor matching.
Recent vital signs and personalised baseline values at time of trigger. The medic sees the trajectory — not just the current state.
Triggering parameters and deviation magnitude. Indicates severity and rate of deterioration before the medic arrives.
Final recorded position before device loss. Enables search and rescue to a defined search area even without active GPS.
The moment SENTINEL detects — everything moves.
SENTINEL does not operate in isolation. It is the detection layer of the complete Neurosync battlefield medical ecosystem. When SENTINEL triggers, SDICS — the SoldierNet Donor Identification and Coordination System — activates simultaneously.
Dual-trigger condition met. Encrypted payload broadcast activates autonomously. No radio call. No human decision.
Compatible pre-verified blood donors within operational range begin moving toward the casualty. Simultaneously with detection.
Medic receives prioritised donor list, casualty identity, blood group, and physiological trajectory. Before visual confirmation.
Role 2 receives the full medical record and begins preparing before the casualty has left the field. No handover delay.
Programme timeline.
HEARTBEAT — the same technology, civilian configured.
SENTINEL and HEARTBEAT share a common hardware platform and firmware architecture. MOD funds the hardware development once. The civilian HEARTBEAT platform generates the long-term revenue that sustains ongoing development without continued MOD subsidy.
Learn about HEARTBEAT
Defence procurement and clinical collaboration
SENTINEL is seeking clinical collaborators with DMS or NATO medical authority experience, and defence procurement partners with interest in force health monitoring and battlefield casualty detection. If you work in DMS, Dstl, DASA, or NATO medical capability development — we want to hear from you.
Get in touchkirk_harper@neurosync-technologies.ltd
+44 7944 299117
Neurosync Technologies Ltd
Registered in England · Company No. 16532903
NTL-004 — UK Patent Filed March 2026 — 22 Claims
Classification: OFFICIAL where marked