What is a vacancy switch?

Occupancy & vacancy sensors are an easy and affordable way to automatically turn on and off the lights and save money! A vacancy sensor requires someone to manually turn ON the lights when they enter the room. Vacancy sensors help you maximize your energy savings since the lights will never automatically turn ON.

Occupancy and vacancy sensors are devices that detect when a space is unoccupied and accordingly automatically turn OFF (or dim) the lights, thereby saving energy. The device may also turn the lights ON automatically upon detecting the presence of people, providing convenience and a potential security aid.

Beside above, what is the difference between occupancy and vacancy sensor? An occupancy sensor turn lights ON automatically upon the detection of motion then turns the lights OFF automatically soon after an area is vacated. A vacancy sensor does not offer an option of automatically turning lighting on requiring a manual button press from the occupant (manual/vacancy mode).

Additionally, how does a vacancy sensor work?

Vacancy sensors assume that a user will turn the lights on manually, typically via a wall switch. The vacancy sensor will then monitor the space to turn lights off if the space is then vacant for a specified length of time. But for spaces with daylight, the “automatic-off” of vacancy sensors is typically preferable.

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 the best occupancy sensor?

The Best Motion Sensor Light Switch in 2019 Lutron Maestro Sensor Light Switch MS-OPS2. Leviton Decora OSSMD-GDW. Enerlites MWOS-W Motion Sensor Switch. Jasco GE Z-Wave Plus Smart Lighting Control Motion Sensor Switch. ecobee Switch+ Smart Light Switch.

Are occupancy sensors required?

Occupancy sensors per C405. 2.2. 2 are required in all classrooms, conference/meeting rooms, employee lunch and break rooms, private offices, restrooms, storage rooms, janitorial closets, and other spaces 300 sq ft or smaller enclosed by ceiling height partitions.

Are occupancy sensors required by code?

Occupancy sensor-based shutoff provides economical distributed control, or ability to control a localized space, and also directly reacts when a space is unoccupied. Codes require the occupancy sensor turn the lights off within 30 minutes of the occupant leaving the space, ensuring energy savings.

What is PIR occupancy sensor?

PIR Occupancy Sensor. One type of occupancy sensor uses passive infrared, or PIR, technology to detect motion. Motion is detected when an infrared source with one temperature, such as an occupant, passes in front of an infrared source with another temperature, such as a wall.

How do you turn off occupancy sensor light switch?

Most manufacturers make it a fairly easy process to disable this main feature of the lights. A switch on the fixture should read “on time,” usually found directly under the motion sensor. Set it to any position, aside from the test position, and flip off the switch that the light is connected to.

How many Occupancy sensors does a power pack have?

The relay in the power pack is controlled by the occupancy sensors connected via the 22 Gauge Blue “occupancy” wire. Multiple occupancy sensors can be connected to a single power pack in order to fully cover an area.

How does ultrasonic occupancy sensor work?

Occupancy sensors use different technologies — including passive infrared (PIR), ultrasonic and dual-technology — to detect the presence or absence of occupants in a space. Ultrasonic sensors detect the presence of people by sending out ultrasonic sound waves into a space and measuring the speed at which they return.

How do you wire multiple occupancy sensors?

To wire multiple low voltage occupancy sensors to a single or multiple power packs, complete the following: Tie all sensor red wires together to the red on the power pack. Tie all sensor black wires together with the black on the power pack. Tie all white wires on all sensors together.

How do passive infrared sensors work?

A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors. They work entirely by detecting infrared radiation (radiant heat) emitted by or reflected from objects.

Do occupancy sensors need a neutral?

Occupancy sensors require standby power to operate the sensor when the load is “off”. To do that it needs a path to Neutral; some models require Neutral, others require Ground (which is used to draw power, but the current is less than 1ma is considered harmless).