The reasons those systems go off is because when your using them on multiple floors you have RFID bleed-through. You need a system that has the capability to stagger-tune between floors or certain zones on one floor are going to cause alarms on a different floor (either up or down). Here's a couple of good articles that were just published in a hospital security magazine about infant protection systems: http://www.campussafetymagazine.com/Channel/Hospital-Security/Articles/2010/07/New-Hampshire-Hospital-Deploys-RFID-Tags-for-Infant-Security.aspx http://www.campussafetymagazine.com/Channel/Hospital-Security/Articles/2010/07/Infant-Security-Basics.aspx The system they're talking about in the article is an accutech cuddles system that utilizes a soft band which wont fall off and cause alarm due to post birth weight loss, and also wont cut or chaffe a new-borns skin. I believe their systems also have a stagger tuning capability which wont cause alarms from different floors. I hope all this helps...