01Focus interrupted
Office lights dim during quiet work.
True Occupancy Detection
Still here.
Still seen.
Lighting that recognises real human presence — even when movement stops.
Presence maintainedHeartbeat & breathing detected
The fundamental difference
Motion detects activity.
True Occupancy detects presence.
Conventional sensors lose sight of people when movement becomes too small. Hytronik True Occupancy continues to recognise the subtle human signals that remain — helping lighting respond to people, not assumptions.
Detects breathing-level movementFilters environmental interferencePrevents premature switch-off
Motion is not presence
One quiet room.
Two very different outcomes.
Occupancy confirmed
The person stops moving. The light stays on.
Breathing-level micro movement remains visible to the sensor, so comfort continues without extending wasteful hold times.
Large movement
Micro movement
Vital movement
What missed presence feels like
Small detection gaps become visible interruptions.
For the occupant, the problem is immediate: concentration breaks, presentations stop and people have to move simply to restore the light.
01
02Presentation interrupted
A meeting pauses while someone retriggers the sensor.
03Unexpected darkness
A still occupant is left without the expected light.
When presence detection fails
The whole project pays for the workaround.
Unexpected dimming interrupts quiet work, study and presentations.
People have to wave or move, and every blackout can become a support ticket.
Long hold times mask missed presence but keep genuinely empty rooms lit.
Extra adjustment costs time, while unreliable control weakens the whole project.
See what the sensor sees
Presence has layers.
Human occupancy never becomes completely static. True Occupancy reads increasingly subtle movement as activity reduces.
- Macro movementWalking and entering
- Micro movementTyping and small gestures
- Vital movementBreathing and chest motion
MacroMicroVital
LIVE SIGNALOccupant present
Key features
Built to recognise people, not just movement.
Each capability answers a practical specification problem — comfort, energy performance or dependable control.
Breathing-based detection
Captures subtle chest motion to recognise a stationary occupant.
False-trigger filtering
Filters movement from pets, airflow, curtains and the surrounding environment.
Robust interference immunity
Resists disturbance from 5G, GSM and other RF signals for stable operation.
RED compliance
Designed to meet current European radio-equipment safety and regulatory requirements.
Real-world example
True Occupancy in bathrooms and common areas.
See the sensor in practice
This Hytronik video shows how True Occupancy sensors support reliable lighting control in bathrooms and shared spaces — areas where occupants may remain still and conventional motion detection can lose them.
Where stillness matters
Designed for the moments conventional sensors miss.
01DetectingTyping pauses
Focused offices
02DetectingSeated presentations
Meeting rooms
03DetectingQuiet reading
Libraries
04DetectingResting patients
Healthcare
Comfort and energy finally agree
On when people are present.
Off when they are truly gone.
01
Room occupied
Large movement detected
02
Person becomes still
Vital movement maintained
03
Person leaves
Vacancy confirmed
04
Lights off
Only after the hold time
✓No unnecessary blackouts
✓No excessive hold-time energy waste
Compatible sensors
Specify True Occupancy.
HMW28VFC/PRO
True Occupancy sensor · ON/OFF · Volt-free contact · Surface mounting
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HMW28DCVFC/PRO
True Occupancy sensor · DC output · VFC · Surface mounting
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HMW28/PRO
True Occupancy sensor · ON/OFF · Surface mounting
View product
HBMW29/PRO
True Occupancy sensor · Bluetooth · DALI · Ceiling mounting
View product2026 technical guide
True Occupancy.
Smarter control.
Receive the complete 16-page True Occupancy technical guide, covering heartbeat and breathing detection, head counting, occupancy rate, applications and compatible products.
Specify lighting that understands when people are truly present.
Talk to a Hytronik specialist about sensor selection, positioning, control behaviour and commissioning for your project.