How many PIR sensors do I need for a room?

A standard wall-mounted PIR covers roughly 50 m² after real-world derating (110° wedge × 10 m range, minus 20% for dead zones near walls). Rooms up to 50 m² typically need one sensor — but always add one extra per entrance after the first. Ceiling-mounted 360° sensors cover ~105 m² each. Use the calculator above for room-specific numbers.

Should I use wall-mount or ceiling-mount PIR sensors?

Wall mount is best for corridors, entries, and long approaches — the wedge pattern catches motion crossing the room. Ceiling mount gives more uniform coverage in open spaces (showrooms, lobbies) but needs more sensors per m² in narrow rooms because the circle pattern wastes area along walls.

What's the difference between standard PIR and dual-tech sensors?

Standard PIR detects heat changes from moving bodies. Dual-tech (PIR + microwave) requires both signals to trigger, drastically reducing false alarms from pets, heating vents, or sunlight. Dual-tech costs ~2× more but is required for high-value environments and Grade 3 (EN 50131) installations.

Where should I NOT place a PIR sensor?

Avoid placement above HVAC vents, near windows in direct sunlight, above radiators or fireplaces, and facing reflective surfaces (mirrors, polished metal). Aim the sensor across the room rather than at entry points — intruders crossing the wedge horizontally trigger the sensor more reliably than someone walking directly toward it.

Do I need a curtain PIR sensor?

Curtain PIRs project a narrow vertical 'curtain' of detection (typically 15 m × 2 m). They're ideal for windows, sliding doors, and balconies — protecting the boundary without triggering on indoor movement. Use them in addition to standard wide-angle PIRs, not as a replacement.

PIR 센서 계산기

방 전체를 제대로 감지하는 경보 기능을 갖추려면 동작 감지기가 몇 개나 필요할까요?

✓ 이 계산기는 무료로 사용할 수 있습니다 - 신용카드 불필요

방 길이: 8 m

방 너비: 6 m

총 면적: 48 m²

마운트 유형

센서 기술

객실 입구: 2

권장 PIR 설정

센서 필요

센서 하나당 약 50 m²의 면적을 커버하여 48 m²의 바닥 면적을 커버합니다. 유효 중첩: 108 % (양수 = 신뢰할 수 있는 감지를 위한 중복성).

장비 및 케이블 견적

€90

ZAX IR YJYVZ0ZAX IR YJYVZ × €ZAX IR YJYVZ1ZAX IR YJYVZ 센서 + ~€15/센서 케이블 및 드롭 = €ZAX IR YJYVZ2ZAX IR YJYVZ 센서만 해당

이 센서들을 평면도에 배치하세요.

동일한 프로젝트 캔버스에서 카메라 FOV ) 옆에 PIR 센서를 배치하면 감지 겹침 및 간격을 한눈에 확인할 수 있습니다.

PIR 센서 계산기

권장 PIR 설정

관련 기사

이 센서들을 평면도에 배치하세요.