Table of Contents
What is the difference between a vacancy sensor and an occupancy sensor?
Occupancy sensors may offer an option selection to switch the occupancy sensor from automatically turning the lighting on to A vacancy sensor requires manual activation of the lighting by the occupant then turns the lights OFF automatically soon after an area is vacated.
What does an occupancy sensor do?
An occupancy sensor detects the presence of movement within its given range. The sensor detects motion and transmits the signal to the control unit. If no movement is detected after a period of time set by the user, the controller determines the space is unoccupied and switches off the light.
What is a Dual Technology occupancy sensor?
Echo Dual Tech Occupancy Sensors use passive infrared (PIR) and acoustic detection to provide reliable occupancy and vacancy sensing for lighting control. These sensors provide both automatic on and automatic off functionality working in conjunction with commands from local stations.
What is ultrasonic occupancy sensor?
Ultrasonic occupancy sensors generate high frequency sound waves beyond the capacity of human hearing. Movement in the sound wave field causes a change in wave frequency and the sensor responds by switching on area lights.
Where are vacancy sensors used?
Requires use of occupancy or vacancy sensors in classrooms, conference/meeting rooms, break rooms, private offices, restrooms, storage rooms, janitorial closets and all spaces 300 sq. ft. or less.
Where are vacancy sensors required?
A vacancy sensor must be installed to control lights in bathrooms, garages, laundry rooms, and utility rooms. Outdoor lighting connected to a building must be controlled with a manual on/off switch plus an astronomical timeclock, or photocell and motion sensor, or photocell and time switch.
What is a microphonic sensor?
Microphonics Technology Microphonics utilizes a microphone inside of the sensor to literally hear sounds that indicate occupancy. Microphonics technology is especially useful in rooms with obstructions such as bathrooms with stalls or open office environments with cubicles partitions.
Do occupancy sensors need a neutral?
Information: Leviton multi- technology occupancy sensors employ heavy duty switching relays. A neutral wire is typically required for operation of the relay circuit.
Do occupancy sensors need a power pack?
Multiple occupancy sensors can be connected to a single power pack in order to fully cover an area. The power packs include zero cross switching circuitry to minimize inrush current associated with incandescent and electronic ballasts. This reduces wear and tear on the relay contacts making the power pack last longer.
What is difference between PIR and ultrasonic sensor?
PIR sensors detect occupants’ presence by sensing the difference between heat emitted by moving people and background heat. Ultrasonic sensors detect the presence of people by sending out ultrasonic sound waves into a space and measuring the speed at which they return.
What are the three 3 types occupant detection system sensors?
Occupancy sensor types include:
- PIR sensors, which work on heat difference detection, measuring infrared radiation.
- Environmental sensors, such as temperature, humidity and CO2 sensors, which detect the change in the environment due to the presence of a human.
- Ultrasonic sensors, similar to radar.
- Microwave sensors.
How many occupancy sensors do I need?
Only one sensor is required to turn the lights ON and keep them ON. Note a minimum 20% overlap in coverage area is recommended to ensure reliability of detection. Most commercial building energy codes require lighting be turned OFF or reduced when it is not being used.
What is walk through mode on occupancy sensor?
Walk-Through Mode maximizes energy savings by not leaving the lights ON after a momentary occupancy. The sensor will switch the. lights ON when it detects a person entering the area.
Who invented occupancy sensor?
The first motion sensor was invented in the 1940s by Samuel Bagno using technology that was developed during World War II. Using his military knowledge of radar, Bagno developed a device that used ultrasonic waves and the Doppler effect to detect motion in a room.