Optex “Pet Immune” PIR Motion Sensors up to 18Kg– Intelligent Detection Without False Alarms
Optex Pet Immune PIR (Passive Infrared) sensors are advanced motion detectors specifically designed to ignore pets such as cats and dogs while accurately detecting human intruders. By combining intelligent detection technologies, these sensors significantly reduce false alarms caused by animal movement, environmental changes, or external interference.
Trusted by professional installers worldwide, Optex sensors deliver reliable performance in both residential and commercial security systems, making them ideal for homes with pets.
How Pet Immune Technology Works
Dual-Technology Detection (PIR + Microwave)
Selected Optex models combine PIR sensing with microwave detection, requiring both technologies to confirm movement before triggering an alarm. This dual-tech approach greatly improves accuracy and reduces false alarms.
Dual-Zone Detection Logic
The detection area is divided into upper and lower zones. Human movement activates both zones, while pets typically move only within the lower zone, preventing unnecessary alarms.
Advanced Pyroelectric Elements
Specially engineered pyroelectric sensors are designed to distinguish between human body heat patterns and smaller pet movement.
Adjustable Sensitivity & Masking Options
Installers can fine-tune sensitivity levels and apply masking plates to block unwanted detection areas, such as moving plants, vehicles, or reflective surfaces.
Conductive Shielding
Built-in shielding filters out light interference and radio frequency interference (RFI), improving reliability in challenging environments.
Key Optex Models & Capabilities
Optex HX-40 Series
Outdoor dual-technology sensors with anti-masking protection and adjustable detection settings.
Optex FlipX Series
Indoor and outdoor models featuring rotatable lenses, dual-tech options, and high pet tolerance for flexible installations.
Optex RX / MX-40 Series
Wide-coverage sensors (up to 40 × 40 ft) with pet immunity, available in PIR-only or PIR + microwave versions.
Important Installation Considerations
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Pet Weight Tolerance
While not exact, most models are designed to ignore pets up to a specified weight range. Larger pets may require careful placement and sensitivity adjustment. -
Mounting Height
Correct installation height is critical, especially for outdoor models (typically 2.5–3 m), to maintain effective pet immunity.
Ideal Applications
Suitable for:
- Homes with pets
- Residential alarm systems
- Small to medium commercial properties
- Indoor and outdoor protected areas
Designed for environments where reliable intrusion detection is required without nuisance alarms.







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