INDUSTRY COMPONENT

PIR Sensor Element

PIR sensor element detects motion by measuring infrared radiation changes in its field of view.

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Component Specifications

Definition
A passive infrared sensor element is a pyroelectric component that detects motion by sensing changes in infrared radiation emitted by objects within its detection range. It consists of a pyroelectric material that generates electrical signals when exposed to varying thermal radiation, typically configured with dual or quad sensing elements to differentiate between ambient temperature changes and moving heat sources.
Working Principle
The PIR sensor element operates on the pyroelectric effect, where certain crystalline materials generate a temporary voltage when their temperature changes. When a warm object (like a human) moves across the sensor's field of view, it creates a differential infrared radiation pattern between paired sensing elements, producing a measurable electrical signal that indicates motion.
Materials
Lithium tantalate (LiTaO3) or lead zirconate titanate (PZT) pyroelectric crystals, silicon window with Fresnel lens array, ceramic substrate, gold or aluminum electrodes, epoxy encapsulation
Technical Parameters
  • Field of View 110° x 70°
  • Output Signal Digital pulse or analog voltage
  • Response Time <2 seconds
  • Supply Voltage 2.7-6V DC
  • Detection Range Up to 12 meters
  • Spectral Response 8-14 μm
  • Operating Temperature -20°C to +70°C
Standards
ISO 13849-1, IEC 60947-5-2, UL 60730

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for PIR Sensor Element.

PIR sensor motion detection infrared sensor pyroelectric sensor industrial automation machine safety presence detection PIR Sensor Element PIR Sensor Element in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Motion Sensor

Electronic device that detects movement within its detection range

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Engineering Analysis

Risks & Mitigation
  • False triggering from HVAC airflow
  • Reduced sensitivity in high ambient temperatures
  • Lens contamination reducing detection range
  • Electrical interference in industrial environments
FMEA Triads
Trigger: Pyroelectric crystal degradation
Failure: Reduced sensitivity or complete detection failure
Mitigation: Regular calibration checks, environmental sealing, using industrial-grade components with extended temperature ratings
Trigger: Fresnel lens contamination
Failure: Decreased detection range and false negatives
Mitigation: Install protective covers, implement regular cleaning schedules, use anti-static coatings

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±10% detection range variation, ±5°C temperature compensation accuracy
Test Method
ISO 13849-1 performance level testing, IEC 60947-5-2 electrical safety testing, environmental stress screening (ESS)

Buyer Feedback

★★★★☆ 4.9 / 5.0 (24 reviews)

"Great transparency on the PIR Sensor Element components. Essential for our Machinery and Equipment Manufacturing supply chain."

"The PIR Sensor Element we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."

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Frequently Asked Questions

What is the difference between PIR and microwave motion sensors?

PIR sensors detect infrared radiation from moving heat sources, while microwave sensors emit and detect reflected radio waves. PIR is more energy-efficient and less prone to false triggers from non-living objects, but microwave sensors can detect through non-metallic materials.

How does ambient temperature affect PIR sensor performance?

Extreme temperatures can reduce sensitivity. Most industrial PIR sensors include temperature compensation circuits and operate effectively between -20°C to +70°C. Sudden temperature changes may cause false triggers until the sensor stabilizes.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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