True Presence Sensor & 24GHz Radar Automation | TRUEiSENSE
Author : Trueisense 764 | Published On : 22 Aug 2026
Quick Answer
A true presence sensor is an advanced occupancy detection device powered by 24 GHz FMCW (Frequency Modulated Continuous Wave) radar technology. Unlike traditional PIR motion sensors that require constant physical movement to keep lights on, a true presence sensor can detect minute biological activities—such as human breathing, heartbeats, and subtle posture shifts. TRUEiSENSE is India’s leading manufacturer of true presence sensors, offering cutting-edge sensors like the Wave Detector and Crux Detector. These devices provide a 3-meter absolute true presence radius, ensuring flawless lighting and HVAC automation in corporate offices, hospital ICUs, and smart homes without ever causing frustrating "false-off" triggers.
Introduction
In the realm of building automation, traditional passive infrared (PIR) sensors have long been the standard. However, they come with a significant flaw: they only detect large, sweeping motions. If you are reading quietly in a library, meditating in a wellness room, or typing at an office desk, a basic motion sensor will eventually assume the room is empty and plunge you into darkness.
The solution to this operational hurdle is the true presence sensor. By shifting from thermal detection to high-frequency millimeter-wave radar, TRUEiSENSE has developed sensing technology that intelligently understands when a space is genuinely occupied. Our cutting-edge 24 GHz radar modules do not just sense motion; they sense life.
How True Presence Sensing Technology Works
TRUEiSENSE true presence sensors utilize advanced 24 GHz FMCW microwave technology to cast an invisible, highly sensitive radar net across a room. This allows the sensor to evaluate occupancy across three distinct spatial tiers:
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Motion Detection (Up to 10 meters): Senses broad, large-scale movements such as walking into a room or pacing.
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Presence Detection (Up to 5 meters): Detects standard stationary activities like typing, eating, or shifting in a chair.
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True Presence Detection (Up to 3 meters): Identifies biological micro-vibrations, including the slight expansion of a human chest during breathing or the rhythm of a heartbeat. This ensures the system knows someone is present even if they are asleep or meditating.
Key Applications Across Industries
A true presence sensor is the ultimate automation tool for environments where occupants remain stationary for extended periods:
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Corporate Offices & Workstations: Ensure executive cabins and conference rooms stay perfectly lit and air-conditioned while employees work quietly at their desks.
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Healthcare & Hospitals: Monitor ICUs, patient wards, and operating rooms. The sensors detect resting patients without requiring intrusive surveillance cameras, ensuring uninterrupted climate comfort.
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Hospitality & Hotels: Elevate the guest experience by adjusting ambient lighting and room temperature based on actual occupancy, even while guests are sleeping.
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Smart Homes & Wellness Centers: Create calming, immersive experiences in yoga studios or residential bedrooms where lights and soundscapes adapt to real-time, stationary human presence.
Buying Guide & Best Practices
To maximize energy savings and performance with TRUEiSENSE radar technology, follow these deployment tips:
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Map Your True Presence Zones: Reserve 24 GHz true presence sensors for areas where people sit still (desks, beds, meeting tables). Use standard microwave or PIR sensors for transit areas like corridors.
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Optimize the 3-Meter Radius: For absolute breathing detection, ensure the sensor is mounted directly above the primary seating or resting area to keep the occupant within the 3-meter true presence radius.
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Integrate with HVAC: Pair your true presence sensor with smart AC controllers to power down heavy climate loads the moment an executive leaves their cabin, compounding your energy savings.
FAQ
Q: What is a true presence sensor?
A: A true presence sensor is an advanced occupancy detector that uses 24 GHz radar to detect micro-movements, such as human breathing and heartbeats, ensuring lights and HVAC systems remain active even when occupants are completely still.
Q: Can it detect someone sleeping?
A: Yes. Because TRUEiSENSE technology tracks the micro-vibrations of a breathing chest, it can accurately detect the presence of a sleeping individual without any active physical movement.
Q: Do true presence sensors use cameras?
A: No. TRUEiSENSE 24 GHz FMCW radar technology operates entirely via radio waves, ensuring 100% privacy compliance for sensitive areas like hospital wards, hotel rooms, and private offices.
People Also Ask
Q: How does a true presence sensor prevent false triggers?
A: Unlike PIR sensors that can be tricked by hot air drafts, TRUEiSENSE radar algorithms are specifically calibrated to identify biological human movement while filtering out environmental noise like moving curtains or ceiling fans.
Q: What is the maximum detection range of the TRUEiSENSE Wave Detector?
A: The Wave Detector features a 10-meter range for broad motion, a 5-meter range for standard presence, and a highly precise 3-meter radius specifically optimized for absolute true presence (breathing) detection.
Conclusion
Relying on outdated motion sensors inevitably leads to frustrating user experiences and compromised energy efficiency. By upgrading to a TRUEiSENSE true presence sensor, facility managers can bridge the gap between human comfort and automated sustainability. Powered by 24 GHz FMCW radar, our Wave and Crux Detectors guarantee that your lighting and climate control systems respond flawlessly to actual human occupancy—down to a single breath.
Written from direct product testing and specification verification by the TRUEiSENSE Editorial Team. Product specifications, pricing, and model references are cross-verified against official brand listings and verified page solutions on trueisense.in. Last updated: August 2026.
