Union DoorSense Acoustic Fire Door Hold Open Device

Union DoorSense Acoustic Fire Door Hold Open Device

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Union DoorSense Acoustic Fire Door Hold Open Device

£96.00 Excl. VAT £115.20 Incl. VAT £115.20 Incl. VAT £96.00 Excl. VAT
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Product Description

Application uses

Preventing a fire door from closing can put your insurance at risk - and land you in court if a fire takes hold. But you still need a way to hold a fire door open for ease of access. DoorSense is the new way for you to keep a fire door open - and have it close if the alarm sounds, or at a set time.

DoorSense is a standalone unit which can be fixed to a fire door in seconds to provide a reliable way to keep it open - but will automatically release if the fire alarm sounds. DoorSense is incredibly easy to install, needing no wiring or special skills - it can even use the same footprint as some older units.

Once fitted, DoorSense is powered by two Alkaline C batteries for long working life, and has a Low Battery indicator to help you keep the unit in excellent working order.

Once in place you can have it working manually or automatically via a timer to set a night release time, and then leave DoorSense to get on with the job of giving easy access while keep your staff safe.

DoorSense is designed to be robust and practical. A curved, fire-retardent casing helps to deflect impacts and stay looking smart even when subjected to extreme treatment, while the unit footprint allows it to be a direct retro fit for older fire door hold open devices. 


Suitable for use with fire rated doors using door closers with power rating between 3-7

Width: 194mm
Height: 207mm
Depth: 43mm

Power Requirements: 2 x 1.5V DC LR14 Size C Batteries


  • Acoustic release door hold open device 
  • Suitable for use in conjunction with size 3 to size 7 door closers 
  • Suitable for doors up to 160Kg and 1600mm width  
  • Fire rated for timber (FD120) fire doors 
  • 2 year guarantee for peace of mind 
  • Powered by 2xC alkaline batteries which are included
  • Low battery indicator 
  • Timer can be set to automatically release DoorSense 
  • Release sensitivity can be adjusted to suit your environment 
  • Automatically releases with sounds greater than 80dB and longer than 15 seconds 
  • Fail safe mode automatically releases DoorSense 
  • Curved shape to deflect impacts and help prolong working life


  • CE Marked
  • Compliant with BS EN 1155 
  • EMC Tested and rated for timber doors (FD120)

Not sure if this Door Closer is right for your requirements? 

If you are not sure if this door closer is right for your requirements please contact our friendly team today.

Additional Union DoorSense Acoustic Fire Door Hold Open Device Information

Manufacturer Union
Finish Black
Guarantee 2 Year