Union DoorSense Acoustic Release Hold Open Unit (UNI-J-8755A-BLACK) Hikvision Intercom Systems the Union DoorSense releases an

the Union DoorSense releases an open door when the fire alarm sounds

Just press the button and everything is done automatically

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Union DoorSense Acoustic Release Hold Open Unit (UNI-J-8755A-BLACK) Hikvision Intercom Systems the Union DoorSense releases anThe UNION DoorSense is designed to hold your fire doors open, improving access around your building. If the fire alarm sounds, DoorSense automatically releases to let the door close, when used in conjunction with a standard door closer. Unlike a door wedge, the Union DoorSense releases an open door when the fire alarm sounds, allowing it to be closed. They are ideal for any large or small applications where fire doors are installed including care