Bosch TriTech Motion Detector Pet-Immune 40x40 ft

The Bosch BDL2-WP12G TriTech Motion Detector is a pet-friendly motion sensor that blends passive infrared and microwave detection to reliably spot human movement across a 40 ft by 40 ft area while ignoring animals up to 100 lb.

This compact Bosch motion detector pairs three sensing methods to reduce false alarms and improve target recognition indoors. Designed for professional alarm systems, it uses signal amplitude, slope and timing analysis to distinguish human motion from environmental noise, and the optical elements are shielded from dust and insects to keep detection consistent. The unit is built with a robust plastic enclosure, an LED status indicator, and is flexible for mounting between about 7.5 and 9 feet high.

How does the TriTech system tell people apart from pets?

The detector fuses passive infrared (PIR) and microwave sensors with a pattern-recognition algorithm that evaluates signal strength, rate of change and timing to classify movement. This multi-parameter approach reduces the chance of pets triggering alarms while maintaining sensitivity to a walking adult.

• Dual-technology sensing: PIR plus microwave for cross-verification.
• Signal analysis checks amplitude, slope and timing for human signatures.
• Pet immunity up to 100 lb to minimize household false alarms.
• Optical shield prevents insect and dust intrusion that can distort readings.

What coverage area and mounting options does it offer?

The Bosch BDL2-WP12G provides a roughly 40-foot by 40-foot detection field when mounted at the recommended height. Its design supports installation at common interior ceiling heights and allows installers to optimize coverage for hallways, rooms and open areas.

• Recommended mounting height: 7.5–9 feet for standard coverage.
• Wide-angle coverage approximating a 40 ft x 40 ft pattern.
• Low-profile plastic housing suitable for indoor placement.
• LED indicator gives visual confirmation of sensor status during setup and operation.

How does the detector avoid false alarms from the environment?

In addition to dual sensing and signal analysis, the detector’s optical elements are protected against dust and insects — two common causes of spurious triggers. The housing and electronics are engineered to maintain consistent performance in typical indoor environments used for security systems.

• Optical shield prevents insects and dust from interfering with PIR elements.
• Algorithmic filtering reduces responses to slow-moving or oscillatory sources.
• Durable enclosure resists typical indoor wear and maintains sensor alignment.
• LED feedback helps during commissioning to confirm correct positioning and behavior.

What installation and system considerations should I know?

The detector is intended for integration with compatible alarm control panels and should be positioned to avoid facing HVAC vents, direct sunlight or vibrating surfaces. For best results, have a qualified installer configure sensor orientation and sensitivity settings according to the space layout and expected traffic patterns.

• Integrates with professional security panels—verify compatibility before purchase.
• Avoid mounting near HVAC outlets, windows with direct sun, or fans to prevent disturbances.
• Mount at recommended height and use LED indicator during alignment and walk tests.
• Consult installation guide or professional installer for optimal placement and wiring.

Who is this for? The Bosch BDL2-WP12G is aimed at homeowners, property managers and security professionals who need dependable indoor motion detection that reduces nuisance alarms from household pets. It’s well suited for residences with animals, small offices and commercial interiors where robust false-alarm mitigation and clean optical protection are priorities.