What Is a Human Presence Sensor?
A human presence sensor combines PIR technology with high-sensitivity microwave detection to identify human presence even in a completely stationary person. It continuously emits a low-power radar signal and analyses the return for the characteristic micro-movement patterns of a human body — making it the only sensor type capable of reliably keeping lights on in an office while an employee sits completely still at their desk.
The Esysense 360? human presence sensor (ESY-M30) provides:
1. 360? detection coverage from ceiling mount.
2. Adjustable range: 3 to 20 meters.
3. Sensitivity adjustment for room size calibration.
4. Time delay: 10 seconds to 15 minutes.
5. Operating Voltage : 110-270V AC.
Occupancy Sensor India — The Commercial Energy Saving Standard
Occupancy sensor India is the correct terminology in commercial and industrial energy management contexts. In BEE (Bureau of Energy Efficiency) energy auditing, LEED certification, and green building standards, occupancy sensors are a mandated or heavily incentivised energy-saving measure for commercial buildings.
An occupancy sensor India installation in a 10,000 sq ft commercial office can typically save 30–40% of the building's lighting electricity costs — because lights in offices, meeting rooms, and washrooms activate only when truly occupied and switch off within minutes of the last person leaving, even without anyone manually switching them off.
Presence Sensor vs PIR Sensor vs Microwave Sensor — Comparison
1. Standard PIR: Detects visible movement. Works for entrances and corridors. Fails for stationary occupants.
2. Microwave sensor: Detects physical movement including subtle motion. Works for slow-moving occupants. May miss a completely still person.
3. Presence sensor (ESY-M30): Detects breathing-level micro-movement. Reliably maintains lights on for any human presence regardless of activity level. The gold standard for office and commercial automation.
For residential and corridor use: PIR sensors are cost-effective and sufficient.
For offices, meeting rooms, and conference halls where people sit still for extended periods: a human presence sensor is the correct specification.
Explore More Smart Lighting Solutions by Esysense
Looking for more smart sensor lighting for your home or office? Explore our full range:
PIR Motion Sensor — wall mount, ceiling, mini for residential use — esysense.com/products/180-adjustable-pir-motion-sensor
Microwave Motion Sensor — for commercial and outdoor applications — https://esysense.com/produc ...
Motion Sensor Panel Light with Radar Sensor — for office automation — esysense.com/collections/motion-sensor-panel-lights
Frequently Asked Questions (FAQs)
Q: What is the difference between a presence sensor and a PIR sensor?
A: A PIR sensor detects visible movement — it needs someone to walk or gesture visibly to stay triggered. A presence sensor detects micro-movements like breathing and minor gestures from a completely stationary person. Presence sensors are used in offices to prevent lights switching off while an employee sits still at their desk.
Q: What is an occupancy sensor and where is it used?
A: An occupancy sensor (presence sensor) detects human presence in a space and controls connected lighting or HVAC accordingly. It is used in offices, meeting rooms, conference halls, washrooms, libraries, and commercial corridors to ensure lights are only on when the space is genuinely occupied.
Q: What is the detection range of the Esysense human presence sensor?
A: The Esysense ESY-M30 has an adjustable detection range of 3 to 20 meters from ceiling mount position, providing full-room coverage for most commercial and office spaces from a single central sensor.
