UNION DoorSense Fire Door Retainer

The UNION DoorSense Wireless Door Holder

When fire safety meets convenience, the UNION DoorSense magnet ensures your fire doors remain compliant without compromising ease of use. This acoustic fire door holder is designed to safely hold fire doors open and works in conjunction with a fire door closer to ensure your fire door closes in the event of fire alarm activation or when the batteries run out. 

With its adjustable sensitivity and fail safe technology, the DoorSense is perfect for noisy environments like schools, offices, and public buildings. 

It’s a completely wireless solution making it a straightforward, reliable door hold open device that can be easily installed or retrofitted.

Key Product Features:

• Suitable for 120 minute fire doors
• For use in conjunction with a door closing device
• Maximum door width: 1600mm
• Maximum leaf weight: 160kg
• Black or white finish*
• Easy installation
• Supplied complete with floor plate
• Completely wireless
• UKCA marked
• CE marked to EN 1155 
• EMC tested 
• Power: 2 x Size C alkaline batteries (supplied)
• Low battery indicator
• Fail safe
• Automatically releases the door upon hearing the fire alarm
• Adjustable release sensitivity
• Foot operated – setting and manual release
• Timer feature
• Suitable for internal use only
• Main casing dimensions: 152mm x 194mm x 43mm
• Overall height: 207mm

*The UNION DoorSense wireless door holder is available in red as a special order so contact our team today to enquire.

The UNION DoorSense with Acoustic Release Technology

The DoorSense is designed to hold open fire doors in facilities, such as schools, offices, care homes, and public buildings. The door is held open during day to day use and is released upon detecting a fire alarm above 80 dB for 15 seconds or longer. 

Magnetic door holders should be used in conjunction with a door closer to close the door when this device is not active and holding the door open. 

This device can be tailored to your environment. The release sensitivity is adjustable, allowing it to function effectively even in noisy environments. You can also set the timer manually or automatically to control when the DoorSense releases the door.

UNION DoorSense: Fire Door Magnetic Hold Open Device

This magnetic fire door holder is engineered with safety at its core. Suitable for smoke and fire protection doors up to FD120, this device ensures compliance allowing you to hold doors open in a safe, controlled manner while maintaining peace of mind that they’ll release automatically when a fire alarm is triggered.

Its fail safe design guarantees that, even in the event of a battery failure or fault, the hold open will release allowing the door closer to close the door—crucial for preventing the spread of fire and smoke. Meanwhile, the low battery indicator provides plenty of warning to replace the batteries, keeping the system operating smoothly without unexpected downtime.

When installing this sound activated fire door holder, it’s essential to update the mandatory fire door signs to “Automatic Fire Door Keep Clear” signs. Be sure to check our selection of finishes, designed to complement the existing hardware on your doors.

Wireless Convenience for Simplified Installation

One of the standout features of this battery powered fire door hold open device is the ease of installation. Being completely wireless, it doesn’t require complex wiring into the building’s power supply or fire alarm system. This makes it particularly suitable for retrofitting or locations where wiring may be difficult or disruptive. 

The included floor plate simplifies installation even further, saving time and reducing costs. You’ll need a minimum gap of 5mm between the bottom of the door and the floor to allow for smooth door operation over the floor plate.

The installation template included with the product ensures a hassle free setup, and the device is supplied with two size C alkaline batteries for immediate use. The installation instructions are available in the product document section as a downloadable PDF.

Stay Compliant and Safe

For those looking for a safe, reliable, and easy to install fire door hold open solution, the UNION DoorSense fire door retainer delivers on all fronts. Its acoustic release technology and low battery warning make it a must have for environments where fire safety cannot be compromised. With its simple, wireless design and ability to replace older models, it’s the perfect choice for both new installations and retrofitting projects.

Stay compliant, enhance convenience, and keep your fire doors operating exactly as they should with the UNION DoorSense.