How Does a PIR Motion Sensor Work?
A PIR (Passive Infrared) sensor contains a pyroelectric element that detects changes in infrared radiation — heat emitted by human bodies. When a person enters the sensor's detection field, their body heat creates a detectable change in the infrared radiation pattern, and the sensor triggers its output.
Key PIR sensor parameters:
1. Detection range: 3–12 meters depending on model.
2. Detection angle: 90?, 120?, 180?, or 360? depending on mounting type.
3. Sensitivity: adjustable for fine-tuning to avoid false triggers.
4. Delay timer: how long the output stays active after the last detected movement (10 seconds to 10 minutes).
5. LUX threshold: day/night sensor override to prevent daytime activation.
Adjustable PIR Motion Sensor — 180? Wall Mount (ESY-P31)
The Esysense 180? adjustable PIR motion sensor (ESY-P31) is the most versatile wall-mount sensor in the range. All three key parameters are adjustable via dials on the sensor body:
1. Sensitivity: adjust detection range from 1 to 7 meters.
2. Time delay: 3 seconds to 12 minutes.
3. LUX threshold: day/night activation level.
The IP65-rated housing makes it suitable for both indoor and outdoor installation. It is the standard recommendation for building entrances, driveways, garden walls, corridor ends, and external stairwell entry points.
Ceiling Mount PIR Motion Sensor — 360? Coverage for Rooms
A ceiling mount PIR motion sensor is installed in the ceiling and looks downward, providing detection coverage of the entire room beneath. Unlike a wall-mounted PIR with a directional detection field, a ceiling sensor detects movement regardless of the direction of approach — making it ideal for:
1. Offices and meeting rooms where movement may come from any direction.
2. Toilet and washroom entry detection.
3. Lift lobby and reception area automation.
4. Rooms with multiple entry points.
The Esysense ceiling PIR provides an adjustable range from 3?3m to 6?6m coverage area, making it suitable for rooms up to 36 sq meters with a single sensor.
Mini PIR Motion Sensor — Compact Design for Tight Spaces
The Esysense 120? mini PIR motion sensor is a compact, low-profile sensor at just 30mm diameter. It is designed for:
1. Under-cabinet motion detection triggering cabinet LED strips.
2. Wardrobe and almirah interior sensing where a full-size sensor is too large.
3. Narrow corridor detection at close range.
4. Embedded in furniture or cabinetry for invisible sensor integration.
Despite its small size, the mini PIR sensor delivers the same core functionality — adjustable delay, sensitivity adjustment, and 12V/240V output options — as full-size sensors.
PIR Presence Sensor with Remote — Flexible Mode Control
The Esysense PIR presence sensor with remote adds a level of convenience that standalone sensors cannot provide: the ability to override the sensor mode from anywhere in the room using a handheld remote. The remote allows switching between:
1. Auto mode: standard PIR activation.
2. Manual ON: always-on override for extended gatherings or cleaning.
3. Manual OFF: override for presentations, movie watching, or privacy.
4. Sensitivity adjustment: change detection range without accessing the sensor physically.
IR Motion Sensor — Infrared Beam Detection
An IR motion sensor uses an active infrared beam — an emitter and a receiver placed facing each other. When the beam is broken by a person passing through, it triggers the sensor output. Unlike PIR sensors that detect heat, IR beam sensors detect physical presence in a defined beam line — making them more precise for doorway detection, gate entry, and counter traffic counting. Esysense IR motion sensors are used extensively in staircase controllers, cabinet sensors, and access control lighting systems.
PIR Sensor Light Price India — 2026 Guide
Esysense PIR sensor light price India 2026:
1. 180? Adjustable PIR Wall Sensor (ESY-P31): ₹385
2. Ceiling Mount PIR Sensor: available at esysense.com
3. Mini PIR Sensor (120?): available at esysense.com
4. PIR with Remote Control: available at esysense.com
All include free pan-India delivery. Buy PIR sensor online India at esysense.com/products/180-adjustable-pir-motion-sensor.
Explore More Smart Lighting Solutions by Esysense
Looking for more smart sensor lighting for your home or office? Explore our full range:
- Microwave Motion Sensor — for commercial, outdoor & through-wall detection — https://esysense.com/produc ...
- Human Presence Sensor — 360? for office and conference room use — esysense.com/products/human-presence-sensor-360
- Photocell / LDR Sensor — for dusk-to-dawn automatic control — esysense.com/products/photocell-sensor
Frequently Asked Questions (FAQs)
Q: What is the detection range of an adjustable PIR motion sensor?
A: The Esysense 180? adjustable PIR motion sensor (ESY-P31) has an adjustable detection range of 1 to 7 meters. The sensitivity dial allows you to fine-tune the range to avoid detecting movement outside your intended coverage zone.
Q: What is the difference between a wall mount and ceiling mount PIR sensor?
A: A wall mount PIR sensor has a directional detection field (typically 90?–180?) facing outward from the wall — ideal for doorways, entrances, and corridors. A ceiling mount sensor looks downward with 360? circular coverage — ideal for rooms with multiple entry points and open spaces where coverage from any direction is needed.
Q: Can I buy PIR motion sensors online in India?
A: Yes. You can buy PIR sensors online India at esysense.com — the full range including wall mount, ceiling mount, mini PIR, and adjustable models are available with free pan-India delivery.
