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Learning Pyramid compares Passive to Participatory teaching methods in regards to average retention rates. My concern is the research used to determine the percentages reported.

Based on the constructivist approach, Exploriments encourage the learners to actively participate in the learning process, instead of being passive recipients. 

Ceiling mount PIR motion sensor and wall mount ultrasonic motion sensor light for toilets, bathrooms, WC, washrooms and restroom

Steinel German quality fine movement PIR occupancy sensor and presence detector for Classroom, Staff room and Study hall

Ceiling mount 360° ultrasonic motion detector and PIR motion sensor for car parking area and garage lighting control

Steinel German quality 230v 50Hz PIR occupancy sensor and presence detector for Laboratory and R&D centre

PIR motion sensor, occupancy sensor, presence detector, 230v PIR motion detector for energy saving and lighting automation in indoor and outdoor areas of hotel, school, warehouse, office building, car parking areas. Pammvi is dealer of german quality steinel brand PIR motion sensor, occupancy sensor, presence detector, LED lights in India.

Motion sensor Suppliers for 230v PIR based motion detector with 360° and 180° angle of coverage, area of detection and reach upto 20 metres. These PIR movement sensors for lighting can either be ceiling or wall mounted and is available in Passive Infrared (PIR) and ultrasonic / microwave technologies.