A true presence sensor is an advanced human detection device that identifies actual human presence — even when a person is completely still — by detecting breathing patterns, micro-movements, and nano-level body vibrations using 24GHz FMCW radar. Unlike PIR motion sensors that switch off lights when you sit still at your desk, TRUEiSENSE's true presence sensors keep lights and systems active as long as any occupant is genuinely in the room. Ideal for offices, hospitals, warehouses, and conference rooms. 4 models available: Rs. 3,499–Rs. 4,299.
Key Specs at a Glance — TRUEiSENSE True Presence Sensors (2026)
1. TRUEiSENSE ZENSOR
(i) Technology: 24GHz FMCW Radar
(ii) Key Feature: True Presence, Compact
(iii) Price: Rs. 4,128.52 (Sale)
(iv) Best For: Offices, cabins, meeting rooms
2. TRUEiSENSE Wave Detector
(i) Technology: 24GHz mmWave Radar
(ii) Key Feature: Ultra-Precision, Breathing Detection
(iii) Price: Rs. 3,499.00
(iv) Best For: Hospitals, focused workspaces
3. TRUEiSENSE Crux Detector
(i) Technology: 24GHz FMCW + Nano Sensing
(ii) Key Feature: 360° Detection, IP20, Minor Motion 3m
(iii) Price: Rs. 4,299.00
(iv) Best For: Open offices, conference rooms
4. TRUEiSENSE OCT Master Pro
(i) Technology: Real Presence Technology
(ii) Key Feature: Micro Motion Detector, Auto On/Off
(iii) Price: Rs. 3,899.00
(iv) Best For: Corporate & commercial spaces
Full collection: trueisense.in/collections/true-presence-sensors
As of 2026, true presence sensing is the most significant advance in commercial lighting and building automation available to Indian businesses. Unlike conventional PIR motion sensors — which switch off lights the moment you stop moving — TRUEiSENSE's 24GHz FMCW radar-based true presence sensors detect actual human presence continuously, including breathing patterns, micro-movements, and nano-level body vibrations that confirm a living person is in the room even when completely still. TRUEiSENSE, powered by OCTIOT and recognized as India's No.1 True Presence Technology brand, offers four purpose-built models for offices, hospitals, warehouses, and corporate spaces. This guide covers how true presence sensing works, how it differs from motion sensing, what to buy, and how to get a free energy savings assessment.
What Is a True Presence Sensor and How Is It Different from a Motion Sensor?
A true presence sensor detects the actual physical presence of a human being — not just movement — using advanced radar and nano sensing technology that identifies breathing, micro-movements, and subtle body vibrations. This is the core distinction that makes true presence sensors the essential solution for still-occupancy environments.
Traditional PIR motion sensors detect large-scale body heat and movement. When a person stops moving — seated at a desk in a focused meeting, or resting in a hospital bed — the PIR sensor fails to register their presence and switches off the lights, triggering that frustrating experience of waving your arms to restore illumination. A no false off presence sensor eliminates this problem entirely.
TRUEiSENSE uses 24GHz FMCW (Frequency Modulated Continuous Wave) radar combined with nano sensing to detect the most subtle signs of human presence — including breathing patterns and microscopic lung vibrations. The result: lights and connected devices activate when a person genuinely arrives, and switch off only when the space is truly vacant.
Bottom Line:
A true presence sensor is the only sensing technology that correctly identifies a stationary human occupant — eliminating both the 'lights off while I'm sitting still' problem and wasted energy in genuinely empty spaces.
How Does TRUEiSENSE True Presence Sensing Technology Work?
TRUEiSENSE true presence sensors operate on 24GHz FMCW radar technology, using nano sensing to detect human body vibrations, lung movements, and breathing at the microscopic level — far beyond what any PIR or basic microwave sensor can detect.
The Crux Detector uses advanced millimeter detection and nano sensing technology for highly accurate true human presence detection in real time. The Wave Detector extends this further with ultra-precision 24GHz mmWave radar that senses even the slightest breathing patterns and lung vibrations — making it the ideal choice for hospitals, private cabins, and environments where occupants may be stationary for long periods.
Programmable LUX and Time settings allow facility managers to configure sensitivity thresholds and time delays to suit specific space requirements — creating a seamless, hands-free experience for every occupant.
1. 24GHz FMCW Radar
(i) Detects: Frequency shifts from human body presence
(ii) Advantage: Detects stationary occupants accurately
2. Nano Sensing
(i) Detects: Micro-vibrations and breathing movements
(ii) Advantage: Confirms presence even at complete rest
3. Integrated Breathing Detection
(i) Detects: Rhythmic chest expansion and contraction
(ii) Advantage: Validates occupancy beyond any doubt
4. 360° Detection Range
(i) Detects: Full-room coverage without blind spots
(ii) Advantage: No missed occupants in complex layouts
5. Programmable LUX + Time
(i) Detects: Ambient light level + configurable delay
(ii) Advantage: Smart, energy-optimized automation
Bottom Line:
TRUEiSENSE's 24GHz FMCW radar with integrated breathing detection is the only sensor technology available in India that can reliably confirm stationary human presence — making it the standard for smart office, healthcare, and industrial automation.
Which Sensor Detects Humans Even When Sitting Still?
True presence sensors — specifically those using 24GHz FMCW radar with integrated breathing detection — are the only sensor technology capable of detecting a stationary human occupant. Here is a ranked guide to choosing the right TRUEiSENSE model for your space:
1. Office cabin / private room
(i) Best TRUEiSENSE Model: Wave Detector
(ii) Price: Rs. 3,499.00
(iii) Why It Wins: Ultra-precision breathing detection, ideal for solo stationary occupant
2. Open-plan office / workstation floor
(i) Best TRUEiSENSE Model: Crux Detector
(ii) Price: Rs. 4,299.00
(iii) Why It Wins: 360° coverage, detects minor motion at 3m, no blind spots
3. Meeting / conference room
(i) Best TRUEiSENSE Model: ZENSOR
(ii) Price: Rs. 4,128.52 (Sale)
(iii) Why It Wins: Compact install, full true presence, suited to group still-occupancy
4. Hospital / patient room
(i) Best TRUEiSENSE Model: Wave Detector
(ii) Price: Rs. 3,499.00
(iii) Why It Wins: Breathing detection confirms bedridden occupant presence
5. Corporate / large commercial space
(i) Best TRUEiSENSE Model: OCT Master Pro
(ii) Price: Rs. 3,899.00
(iii) Why It Wins: Micro motion detection, auto on/off, scalable deployment
6. Best value overall
(i) Best TRUEiSENSE Model: Wave Detector
(ii) Price: Rs. 3,499.00
(iii) Why It Wins: Lowest price in range, f
