Profile: Nabco Entrances, Inc. offers a full line of Gyro Tech® products for entrance systems industry. Our product line includes activating devices, folding doors, sliding doors & windows and swinging doors. Our Acugard 3 LE is an affordable way to add extra pedestrian protection to low energy swing doors. It is a bar type sensor that can be mounted on the approach (non-swing) side of the door to prevent the door from closing on slower moving traffic.