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PIR Infrared Sensor – wireless
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PIR Infrared Sensor – wireless

$129.90

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PIR Infrared Sensor – wireless

A wireless PIR (Passive Infrared) sensor is a type of motion detector that uses infrared technology to detect the presence and movement of people, animals, or other warm objects within its field of view, and then transmits this information wirelessly to a central control unit.

Here’s a breakdown of its key aspects:

PIR (Passive Infrared) Technology:

  • Passive: The “passive” in PIR means the sensor does not emit any energy (like radar or ultrasonic sensors do). Instead, it “passively” detects the infrared radiation (heat energy) naturally emitted by all objects with a temperature above absolute zero.
  • Infrared Detection: All living beings (humans, pets) and warm objects emit infrared radiation.
  • How it works: A PIR sensor typically has two sensing elements within its housing. When no motion is present, both elements detect the same amount of infrared radiation from the ambient environment. When a warm body moves across the sensor’s field of view, it first enters one sensing element’s range, causing a rapid change in the infrared energy detected by that element. As the body moves further, it then affects the second element. This differential change in infrared energy between the two elements is what the sensor interprets as motion.
  • Fresnel Lens: PIR sensors often have a specialized faceted lens (a Fresnel lens) on their front. This lens helps to focus the infrared radiation onto the sensing elements and creates multiple “detection zones” or “fingers” within the sensor’s field of view, which increases its coverage and sensitivity.

Wireless Functionality:

  • No Wires for Communication: The “wireless” aspect means the sensor communicates with the alarm system’s control panel (or receiver) using radio frequencies (RF) rather than physical wires.
  • Battery Powered: Wireless PIR sensors are usually battery-powered, making them easy to install anywhere without needing to run electrical wiring. The batteries typically last for a significant period (months to years) before needing replacement.
  • Transmitter: Each sensor has a small radio transmitter that sends a signal to the central alarm panel when motion is detected.
  • Receiver: The alarm control panel has a built-in or external wireless receiver that listens for signals from the PIR sensors (and other wireless sensors like door/window contacts).

Key Features and Benefits of Wireless PIR Infrared Sensors:

  • Easy Installation: No need for complex wiring, making DIY installation simpler and reducing labor costs for professional installers. This is a significant advantage in existing structures where running wires might be difficult or aesthetically unappealing.
  • Flexible Placement: Can be mounted virtually anywhere within their effective range of the control panel, providing versatile coverage.
  • Reduced False Alarms (Compared to Simple Motion Detectors): Because PIR sensors detect heat signatures, they are less likely to be triggered by non-living things like swaying curtains, blowing leaves, or shadows (though extreme drafts or sudden temperature changes can still be an issue if not properly installed).
  • Pet Immunity: Many wireless PIR sensors offer “pet immunity” features. These sensors are designed to ignore the infrared signatures of smaller animals (below a certain weight, e.g., 40 lbs or 80 lbs), helping to prevent false alarms in homes with pets. This is achieved by adjusting the sensor’s lens and internal logic to focus on specific infrared patterns that are indicative of human-sized targets.
  • Energy Efficiency: As passive devices, they consume very little power, contributing to long battery life.
  • Comprehensive Coverage: Ideal for protecting large areas or rooms, as a single sensor can cover a significant space.
  • Integration: Seamlessly integrate with smart home security systems, allowing for remote monitoring, alerts via smartphone apps, and sometimes even integration with other smart devices (e.g., turning on lights when motion is detected).

Common Applications:

  • Home Security Systems: Widely used indoors to detect intruders in living rooms, hallways, bedrooms, and basements. Outdoor-rated versions are also available for perimeter protection.
  • Commercial Security Systems: Protecting offices, warehouses, retail spaces, and other commercial properties.
  • Automated Lighting: Activating lights in rooms, hallways, or outdoor areas when someone enters.
  • Smart Home Automation: Triggering various smart home routines based on occupancy (e.g., adjusting thermostat, playing music).
  • Access Control: Monitoring movement in restricted areas.

Considerations for Installation in Surrey, BC:

  • Placement: Proper placement is crucial to avoid false alarms. Avoid aiming them directly at heat sources (vents, radiators, direct sunlight, fireplaces), areas with strong drafts, or windows (especially those exposed to direct sun or busy outdoor activity).
  • Pet Immunity Settings: If you have pets, ensure the sensor has pet immunity and that it’s set correctly for your pet’s size and the sensor’s mounting height.
  • Signal Range: Ensure the sensor is within the wireless range of your alarm panel, considering walls and other obstructions that might weaken the signal.
  • Battery Life: Be mindful of battery replacement schedules to ensure continuous operation.

In essence, a wireless PIR infrared sensor is an intelligent, easy-to-install motion detector that forms a crucial part of modern, flexible security and automation systems, detecting movement based on heat signatures and communicating wirelessly.

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Category: Accessories Tags: alarm, Infrared, pir, sensor, Wireless
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Description

PIR Infrared Sensor – wireless

*DC 12 V

*NC/NO

A wireless PIR (Passive Infrared) sensor is a motion detector that uses infrared technology to sense movement without needing physical wires. It detects infrared radiation emitted by objects, such as humans or animals, and triggers an alert when a change in the infrared field is detected. These sensors are commonly used in security systems, automatic lighting, and other applications where wireless motion detection is needed. 

Here’s a more detailed breakdown:
PIR Technology:
  • Passive Infrared (PIR):

    PIR sensors detect infrared radiation, which is emitted by all objects with a temperature above absolute zero. 

  • Pyroelectric Sensor:

    PIR sensors utilize a pyroelectric sensor that can detect changes in infrared radiation levels. 

  • Motion Detection:

    When a person or animal moves within the sensor’s field of view, the infrared radiation emitted by their body causes a change in the infrared levels detected by the sensor. 

  • No Active Emission:

    PIR sensors do not emit any radiation themselves; they passively detect the infrared radiation emitted by other objects. 

Wireless PIR Sensors:
  • No Wiring Required:

    Wireless PIR sensors communicate with a receiver or other connected device wirelessly, eliminating the need for physical wiring. 

  • Easy Installation:

    This makes them easy to install in various locations, especially where running wires is inconvenient or impossible. 

  • Battery Powered:

    Many wireless PIR sensors are battery-powered, further simplifying installation and maintenance. 

  • Typical Applications:

    Wireless PIR sensors are often used in:

    • Home security systems: Triggering alarms or notifications when motion is detected. 
    • Automatic lighting: Turning lights on when someone enters a room or area. 
    • Industrial settings: Monitoring for movement in warehouses or other large spaces. 
    • Smart home automation: Triggering other smart devices based on motion detection. 
In summary, wireless PIR sensors offer a convenient and versatile way to detect motion without the need for complex wiring, making them a popular choice for a wide range of applications. 
Additional information
Weight 0.15 kg
Dimensions 20 × 15 × 8 cm
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• Sales Dep.: (778)384-2800
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