Modern selective-entry pet doors combine infrared motion sensors with identification systems such as RFID collar tags, implantable microchip readers (ISO 11784/11785), or BLE tags to allow only registered pets to enter. They improve security and reduce unwanted animals but require attention to compatibility, power, and training.

How selective-entry pet doors work

Modern pet doors use a mix of sensors and identification to let only authorized animals enter. A common setup combines a proximity or motion sensor (often infrared) with an electronic reader that recognizes a collar tag or a pet microchip. When the reader verifies a known ID, the flap unlocks and the pet can come in.

Identification methods

  • RFID/collar tags: Passive or active RFID tags on the pet's collar transmit a unique code when the animal approaches. The door reads that code and opens only for recognized tags.
  • Microchip readers: Some doors read implanted ISO standard microchips (ISO 11784/11785, 134.2 kHz). This removes the need for a collar tag but requires a compatible reader.
  • Bluetooth/Smart tags: Newer models can use Bluetooth Low Energy (BLE) tags or smartphone apps for additional control, logging, or remote locking.
Infrared sensors are still used, but primarily as motion detectors to trigger the reader or as a safety sensor to prevent the flap from closing on the animal.

Security and benefits

Selective-entry doors reduce unwanted visitors like neighborhood strays, wildlife, and pests. They also limit foot traffic for homes in rural areas and lower the chance of an unknown animal entering when children are present.

Because access requires a registered ID, these doors improve home security compared with an always-open flap. Yet no system is perfectly foolproof: a lost collar tag or a cloned/borrowed tag could allow entry, and very small animals might bypass size-based barriers.

Practical considerations

  • Compatibility: If you want to use a pet's implanted microchip, confirm the door reads the same microchip standard used by your vet (many use the ISO 11784/11785 134.2 kHz standard).
  • Power and reliability: Electronic doors run on batteries or mains power with battery backup. Expect periodic battery changes and test the fail-safe settings for power outages.
  • Installation and weatherproofing: Choose a model with a good seal and appropriate insulation for exterior doors or walls. Professional installation can help with fit and security.
  • Training: Pets usually adapt quickly but benefit from short training sessions where you guide them through the door while it opens.

Bottom line

Selective-entry pet doors that pair identification (RFID, microchip, or BLE) with sensors give targeted access to your pet while keeping out most unwanted animals. They add convenience and a measurable security improvement for households that need controlled outdoor access.

FAQs about Infrared Pet Door

How does an infrared pet door differ from an RFID or microchip door?
Infrared is typically used as a motion or safety sensor, while RFID and microchip systems perform the actual identification. Together they detect approach and verify identity before unlocking the flap.
Can a door read my pet's implanted microchip?
Some pet doors include microchip readers compatible with common standards (ISO 11784/11785, 134.2 kHz). Check the door's specifications to confirm it supports your pet's microchip.
Will other animals be able to get in?
Selective-entry systems greatly reduce access for stray animals and wildlife, but no system is completely foolproof - lost or borrowed tags, small animals slipping through, or determined intruders remain possible risks.
What about power outages and batteries?
Many electronic pet doors run on batteries or mains power with battery backup. Regular battery checks and testing of fail-safe settings are important to maintain reliable access.
Is installation difficult?
Installation varies by model and location. Wall- or door-through installations can be DIY for handy owners, but professional installation ensures proper sealing, security, and alignment.

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