answersLogoWhite

0

they have movement sensors on them

User Avatar

Wiki User

12y ago

What else can I help you with?

Related Questions

7 How do the automatic doors at a supermarket know when to open and close?

The doors have a black thing at the top of them. Inside that thing is a sencer and when you walk in to the sencer the doors open.


When did the El Rancho Supermarket open its doors?

The El Rancho Supermarket has been dedicated to serving and making the Hispanic community of the entire US feel "At Home" since it first opened its doors to America in 1988.


How hard is it to manually open supermarket sliding doors?

It is not that hard to manually open supermarket sliding doors. All of the doors should have sensors which can automatically open the door if the sensor is connected to a computer. If the door is stuck, just use the computer to open it. If it is not connected to a computer, then it is also very easy to open it manually with your hands. Just grab the middle and pull, I have tried it before, its not that hard to open. It's very light. If you still can't open it then use a thin wedge, the way you use a credit card to open a locked door. Stick it between the two doors, and then try to pull. Very simple.


Why freezers are kept open in the supermarket?

to airate the freezer to avoid smell to acure The "open freezers" are not freezers; those are COOLERS. They are very efficient because the cooled ari is directed/recirculated within the confined cooler section. Leaving them "open" allows customer to chose product without opening/closing doors.


What is an open e string?

An open E is when you pluck your E string only, without touching the frets.


How open doors without battery of 1998 model BMW 325 i car?

Use you key to unlock the doors.


When was Doors Open created?

Doors Open was created in 2008.


How do you open doors on mineblocks?

how do you open doors on mine blocks


What is the ISBN of Doors Open?

The ISBN of Doors Open is 0752890700.


How many pages does Doors Open have?

Doors Open has 272 pages.


Can you drive with van doors open?

can i drive with rear doors open on a van


What has the author Todd M Davis written?

Todd M. Davis has written: 'Open Doors 2003' 'Open Doors 1996-97' 'Open Doors 2004: Report on International Educational Exchange (Open Doors: Institute of International Education) (Open Doors//Institute of International Education)'