Quick Recommendation
(i) Best for residential corridors, stair landings & small washrooms (6m Range): 360° Ceiling PIR Motion Sensor Switch — Compact surface-mounted design delivering 6m diameter coverage and up to 300W load capacity for home automation.
(ii) Best for broad office bays, lobbies & commercial corridors (8m Range): 8M Surface-Mount 360° PIR Motion Sensor — Provides wide infrared coverage, adjustable Lux sensitivity (3–2000 Lux), and time delay settings for commercial interiors.
(iii) Best for high-precision occupancy & micro-motion in conference rooms (10m Range): 360° Human Presence Sensor — Advanced PIR and presence detection unit offering up to 10m coverage, DIP-switch programming, and ultra-low 0.5W power draw for smart workspaces.
(iv) Explore the complete 360° indoor motion sensor lineup: Compare detection ranges, load ratings, mounting styles, and order directly from the official Esysense 360° Human Presence Sensor.
Product Overview
Ceiling-mounted passive infrared (PIR) detectors combine pyroelectric thermal elements, multi-segment optical lenses, ambient Lux photocells, and adjustable timer relays inside compact geometric housings.
(i) What it is: An omnidirectional infrared motion detection switch engineered for overhead ceiling installation to automate AC lighting and ventilation circuits based on occupant thermal movement.
(ii) What it does: Continuously measures infrared heat differentials across its optical field of view, instantly closing an internal relay to power connected lights when human movement occurs in dark conditions.
(iii) Who it is intended for: Homeowners, electrical contractors, office administrators, facility directors, and interior lighting designers.
(iv) Primary features: 360° circular detection field, dual/quad pyroelectric PIR sensor element, adjustable Lux threshold (3 to 2000 Lux), customizable off-delay timer (10 sec to 15 min), and DIP-switch or dial-based adjustments.
(v) Key specifications: Operating Voltage: 110V–280V AC, 50/60Hz; Load Capacity: 300W to 500W (LED / Inductive loads); Detection Distance: 6m to 10m diameter; Mounting Height: 2.2m to 4.0m; Standby Consumption: < 0.5W; Ingress Rating: IP20 indoor protection.
(vi) Main use cases: Office conference rooms, open-plan work bays, residential hallways, washrooms, stairwells, storage rooms, and underground parking lobbies.
(vii) Important limitations: PIR technology relies on line-of-sight thermal movement and cannot detect motion through solid walls, glass partitions, or cubicle dividers.
Why This Matters
Unmonitored ceiling lights in commercial offices, common washrooms, and residential corridors account for a major portion of building energy waste. Installing an overhead 360-degree PIR motion sensor guarantees that lights remain active only when spaces are actively occupied, eliminating manual switch management while extending LED driver lifespans.
How 360-Degree PIR Motion Sensors Work
A ceiling PIR sensor converts human body heat into an automated electrical switching signal through a multi-stage optical and electronic process:
1. Dual-Element Pyroelectric Sensing & Fresnel Lens Cone
The optical dome of a 360 degree motion sensor consists of a multi-faceted Fresnel lens array. This lens breaks the surrounding 360° spatial field into dozens of distinct conical detection zones, focusing ambient infrared radiation onto two internal pyroelectric sensor elements.
2. Differential Thermal Detection Logic
When a person enters the room, their body heat (37° C) passes from one detection zone to another, creating a thermal voltage differential between the pyroelectric elements. The internal microcontroller processes this rapid voltage spike as motion, immediately triggering the internal relay.
3. Integrated Lux Suppression Logic
An integrated ambient photocell measures natural daylight in the room. If daylight exceeds the chosen Lux threshold (e.g., set to 30 Lux), the sensor keeps the light circuit open even if thermal motion is present, preventing daylight energy waste.
Main Decision Factors: Choosing a 360-Degree PIR Motion Sensor
1. Detection Diameter & Mounting Height
What to look for: Match the sensor's optical detection range with your ceiling height and floor area.
Why it matters: At a standard ceiling mounting height of 2.4 to 3 meters, a 6-meter model covers small washrooms and entry halls, an 8-meter model covers medium corridors, and a 10-meter human presence model covers large office bays and conference rooms.
Practical recommendation: Use 6m to 8m PIR sensors for residential rooms and small hallways; choose 10m human presence sensors for open-plan offices and large meeting rooms available at the official Esysense 360° Human Presence Sensor.
2. Mounting Style: Surface Mount vs. Concealed Recessed
What to look for: Assess your ceiling construction material prior to purchase.
Why it matters: Surface-mounted 360° PIR units attach directly onto flat concrete slabs or surface junction boxes without ceiling cutouts. Concealed recessed units clip flush into false POP ceilings, grid panels, or plasterboard ceilings for a sleek visual profile.
Practical recommendation: Select surface-mount models for concrete ceilings and industrial retrofits; select concealed recessed models for modern false ceilings and executive office spaces.
3. Time Delay & Ambient Lux Adjustability
What to look for: Look for wide control ranges on time delays and photocell thresholds.
Why it matters: Washrooms and walk-in pantries require short off-delays (e.g., 30 sec to 2 min), whereas office work bays benefit from longer delays (e.g., 5 to 15 min) to prevent premature shutoffs during quiet desk work.
Practical recommendation: Choose sensors offering broad time delay windows (10 sec to 15 min) and wide Lux sensitivity dials (3 to 2000 Lux).
Technical Specification Comparison
1. 6m Ceiling Surface PIR Motion Sensor Switch
Detection Angle & Range: 360° Circular Field / Max 6m Diameter.
Mounting Type: Surface Ceiling Mount.
Load Capacity: Up to 300W LED / Resistive Load.
Adjustability: Time Delay (10 sec – 7 min), Lux (3 – 2000 Lux).
Operating Voltage: 110V–270V AC, 50/60Hz.
Best Application: Residential stairwells, entry foyers, utility rooms, and small washrooms.
2. 8m Wide-Coverage Surface PIR Motion Sensor
Detection Angle & Range: 360° Field / Max 8m Diameter.
Mounting Type: Surface Ceiling Mount.
Load Capacity: Up to 300W LED / Resistive Load.
Adjustability: Time Delay (3 sec – 15 min), Lux (3 – 2000 Lux).
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