WisuAlarm DHI-HY-SA40A-R8 | Wireless Interlinked Smoke Alarm | 10-Year Battery, Split-Spectrum Sensor
£20.42 (inc VAT: £24.50)
Summary
The WisuAlarm Wireless Interlinked Battery Smoke Alarm delivers reliable, long-term fire protection without the need for mains wiring or regular battery changes. Powered by a sealed 10-year lithium battery, this alarm is ideal for domestic homes, holiday lets, and rental properties where simplicity and low maintenance are essential.
At the heart of this alarm is an advanced split-spectrum photoelectric sensor, which is designed to detect real fires quickly while significantly reducing nuisance alarms caused by cooking fumes or steam from bathrooms. When smoke is detected, the alarm triggers an 85 dB(A) siren and simultaneously activates all interlinked WisuAlarm devices throughout the property, ensuring every occupant is alerted regardless of their location.
Installation is straightforward with a simple ceiling-mount design, and the alarm can be linked wirelessly with up to 24 compatible WisuAlarm units operating at 868 MHz. A standout convenience feature is the remote hush function, which allows the alarm to be silenced using any standard infrared TV remote — no ladders required. For remote monitoring, the alarm is compatible with the optional WisuAlarm Internet Gateway, enabling push notifications via the free mobile app when you are away from the property.
Features
- 10-year sealed 3V CR123A lithium battery for maintenance-free operation
- Split-spectrum photoelectric smoke sensor for accurate, fast detection
- Wirelessly interlinks with up to 24 compatible WisuAlarm devices
- 85 dB(A) alarm volume at 3 metres for effective alerting
- Visual and audible alarm mode
- Remote hush function compatible with any standard infrared TV remote
- Combined test and hush button for easy testing
- 9-minute silence duration to manage nuisance alarms
- Audible low battery warning signal
- Grade F1 compliant for domestic installation
- 868 MHz radio frequency with up to 1000 m open-air range
- Compatible with optional Internet Gateway for remote app notifications
- Simple ceiling surface-mount installation
- Compact design: Ø81.5 mm × 51.6 mm, 110 g
- Certified to EN 14604:2005+AC:2008 and TÜV & CE marked
FAQ
How many alarms can be interlinked together?
The WisuAlarm can be wirelessly interlinked with up to 24 compatible WisuAlarm devices. When any one alarm detects smoke, all linked units will sound simultaneously, ensuring occupants throughout the property are alerted.
Does this alarm require mains wiring?
No. This alarm is entirely battery powered using a sealed 10-year 3V CR123A lithium battery. No mains wiring is required, making it straightforward to install in any property without the need for an electrician.
How does the split-spectrum sensor reduce false alarms?
The split-spectrum photoelectric sensor uses multiple wavelengths of light to better distinguish between real fire smoke and common sources of nuisance alarms such as cooking fumes and steam from bathrooms or showers. This makes it particularly well suited to kitchens and areas prone to false activations.
How do I silence the alarm if it activates accidentally?
The alarm features a combined test and hush button located on the unit itself. Additionally, a unique remote hush function allows you to silence the alarm using any standard infrared TV remote control, removing the need to climb a ladder to reach the unit. The alarm will remain silenced for up to 9 minutes.
Can I monitor this alarm remotely when I am away from the property?
Yes. The alarm is compatible with the optional WisuAlarm Internet Gateway, which connects to your home network. Once paired, you can receive instant push notifications via the free WisuAlarm mobile app whenever the alarm is triggered, allowing remote monitoring of the property.
What regulations does this alarm comply with?
The WisuAlarm is Grade F1 compliant, making it suitable for domestic installation in line with BS 5839-6. It also meets EN 14604:2005+AC:2008 for smoke alarms, along with additional radio and EMC standards including EN 62479:2010 and EN 50130-4:2011+A1. The alarm carries TÜV and CE certification.
Specifications
- Model: DHI-HY-SA40A-R8
- Working Principle: Photoelectric (split-spectrum)
- Collection Type: Smoke
- Sampling Period: 9 seconds
- Pre-Set Alarm Value: 0.2 dB/m – 0.3 dB/m
- Alarm Volume: 85 dB(A) at 3m
- Alarm Mode: Visual and audible
- Silence Function: Yes
- Silence Duration: 9 minutes
- Infrared Silence: Yes
- Operating Frequency: 868 MHz
- Radio Range: Up to 1000m (open air)
- Max Interconnected Units: 24
- Coverage Area: 20–40m² (ceiling height <8m)
- Battery Life: 10 years
- Power Source: 3V CR123A lithium (sealed)
- Monitoring Current: ≤15µA (average)
- Alarm Current: ≤35mA (average)
- Operating Temperature: -10°C to +55°C
- Operating Humidity: ≤95% RH (non-condensing)
- Dimensions: Ø81.5mm × 51.6mm
- Weight: 110g
- Installation: Ceiling mount
- Casing: PC+ABS
- Colour: White
- Certifications: TÜV & CE
- Compliance Standards: EN 14604:2005+AC:2008, EN 62479:2010, EN 50130-4:2011+A1, EN 301489-1 V2.2.3:2019, EN 301489-3 V2.1.1:2019
Downloads
- Datasheet (Adobe PDF)
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