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Sona Wi-Safe 2 WSM-SN-1 Mains Powered Wireless Smoke Alarm - Discontinued

Product Code: WSM-SN-1

Customer Rating: 0 stars

Sona Wi-Safe 2 WSM-SN-1 Mains Powered Wireless Smoke Alarm - Discontinued Key Features

This product has now been discontinued

  • Provides Class A1 smoke detection
  • Suitable for Grade D systems
  • Kitemarked to BS EN 14604:2005
  • 5 year manufacturer warranty
  • Mixed system compatibility, suitable for hard-wired and wireless linking
  • Provides a fast reaction to both fast flaming and slow smouldering fires
  • Incorporates signature smoke sensing technology used by 92% of the UK Fire & Rescue Services
  • Mains powered, with tamper-proof sealed for life battery back-up
  • Low energy usage (approximately 10% less than the average AC fire alarm)
  • The only smoke alarm currently on the market with a proven carbon footprint
  • 85dB sounder
  • Designed to prevent dust ingress and draughts into the back of the device
  • Easy to install with an integrated ultra-slim mounting base
  • Combined test/silence/locate button
  • Intelligent locate feature for quick identification of triggered devices
  • Silence function for low battery chirp and known false alarms
  • Memory function - when a device has previously gone into alarm, an indicator on the unit will flash every 10 seconds
  • Tamper-resistant hinge lock secures the detector to the base and ensures that it can only be removed by using a tool
  • Unique alarm tone to interlinked carbon monoxide detectors makes it easy to differentiate between a fire and a carbon monoxide event

Product Information

This product has been discontinued and is for information purposes only.

The SONA WSM-SN-1 is a 230V mains powered smoke detector, with tamper-proof sealed for life battery back-up and both wireless and hard-wired interlinking capabilities. Under typical usage conditions, it uses approximately 10% less power than the average AC fire alarm, making it the only smoke detector currently on the market with a proven carbon footprint. The back-up battery boasts a lifespan of 10 years.

Its integrated ultra-slim mounting base ensures easy installation, and its tamper-resistant hinge prevents the detector unit being removed without a suitable tool.

'Sleep Easy' functionality enables the low battery chirp to be silenced for an 8 hour period (this function can be used up to a maximum of 10 times). The alarm can be temporarily silenced for up to 10 minutes in the case of a known false activation, however if the level of smoke detected is very high, this feature will be overridden for your safety and the alarm will continue to sound. When the combined test/silence/locate button is pressed on any device on the network, all connected devices except the device that was triggered will be silenced, offering easy identification of the unit in alarm.

This product provides Class A1 smoke detection, and is appropriate for use in Grade D systems. It is approved to
BS EN 14604:2005, ETSI EN 300 220-2 V2.3.2 (2010-02), EN300489-1 &-3 and EN300220-2 - Radio. The manufacturer warranty period is 5 years.


This versatile alarm is ideal for use in mixed systems, which means that it can be linked wirelessly with up to 50 compatible devices, as well as up to 30 units via hard-wiring with 3 core and earth cable. When any device on the system is activated, the 85dB sounders will sound on every other interlinked unit.

Thermoptek Technology

Designed to respond quickly to both fast flaming and slow smouldering fires, this product employs Thermoptek technology, which constantly monitors for temperature change and provides an early response if the temperature is predicted to rise above a predetermined threshold.

Pack Contents

  • Wall Fixings
  • Instruction Manual

Compatible Devices

The below devices are compatible with the SONA WSM-SN-1 Wireless Smoke Alarm:

Model Number  Model Type Interconnection Type 
SONA WTSL-SN-1 Control Unit
SONA WCOB-SN-1 Wireless Carbon Monoxide Alarm
SONA WHM-SN-1 Wireless Heat Alarm
Wireless, hard-wired
SONA HM-SN-1 Heat Alarm
SONA SM-SN-1 Smoke Alarm

Technical Details

Manufacturer: SONA
Product Code: WSM-SN-1
Supply Voltage: 230V AC, 50Hz
Battery Back-Up: 10 year lithium battery
Technology: Thermoptek and Wi-Safe 2
Alarm Sound Level: 85dB (A) at 3m (minimum)
Installation Positions: Ceiling, wall
Operating Temperature: +4℃ to +38℃
Operating Humidity: Up to 90% RH non-condensing
Storage Temperature: -20℃ to +60℃
Storage Humidity: Up to 93% RH non condensing
Plastic Material: ABS - UL94 V0 flame retardant
Warranty: 5 years
Approvals: BS EN 14604:2005/CE
ETSI EN 300 220-2 V2.3.2
EN300489-1 &-3
EN300220-2 - Radio
Operating Frequency: 868MHz
Max No. of Connected Units: 50 units
Networking: Multi-directional communication
Range: 35m (over 200m in clear air)
Dimensions: 141.5mm x 43mm

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