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Table 1 Specification of PIR sensors

From: Design and implementation of a distributed fall detection system based on wireless sensor networks

PIR index Mask Sector angle ϕ Cone angle β
1 Type I -45°to 90° 45°
2 Type I 45°-180° 45°
3 Type I 135°-270° 45°
4 Type I -135°to 0° 45°
5 Type II 0°-360° 10°
6 Type II 0°-360° 25°
7 Type II 0°-360° 45°