YA50
Multi-tone audible warning with two alarm stages.
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Clifford & Snell
Sound the Alarm.Make It Visible.
Sounders and beacons for industrial, fire and marine applications.
About Clifford & Snell
Sound and Light, Working Together
Clifford & Snell offers audible and visual warning devices for demanding sites. Part of Moflash since 2019, the range includes Yodalarm sounders, Yodalight combined alarms and visual signals.
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Our products
The Clifford & Snell range
YL50
A sounder and beacon in one housing.
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FD40
LED flashing indication for visual warnings.
Explore FD40 Ask about this rangeChoose the Warning for the Workplace
01
Noisy Work Areas
Match the tone and output to background noise and the distance to listeners.
02
Visual Warning
Add a beacon where the alarm also needs to be seen. Check sightlines and ambient light.
03
Marine Installations
Select the exact variant with the approval required for the vessel.
Product guide
Sound, Light or Both?
Compare the role of each device before choosing a model.
01
Audible Warning
YA sounders provide alarm tones. Select the tone and output for the background noise and listening positions, then check the supply and alarm-stage wiring.
02
Combined Warning
YL units combine a sounder and beacon. Match both the audible coverage and the visual signal to the area; the beacon colour alone does not confirm fire-alarm suitability.
03
Visual Indication
FD flashing devices provide visual signals. Check viewing positions, lens colour and ambient light, along with any required fire or marine approval.
Certifications
Approvals, at a glance
Approvals apply to the specified model, supply and configuration. IP66 weather protection is not an explosion-protection approval.
Applications
Where And How To Use The Range
Specialist Applications
Intrinsically Safe Beacons
FD40IS and SD40IS beacons have ATEX and IECEx certification for specified hazardous-area installations.
Manufacturer DetailsPlan delivery and supportSolution designTesting and commissioningStatutory system testing and maintenanceTraining
More From Clifford & Snell
Other Fire Safety Products
Ask us about availability and the model requirements for your project.
Technical resources
Product documents and downloads
Frequently asked questions
Quick answers
What is the difference between Yodalarm and Yodalight?
Yodalarm covers audible warning devices such as YA50. Yodalight combined devices such as YL50 add a beacon, giving sound and light from one unit.
Is Clifford & Snell part of Moflash?
Moflash acquired the Clifford & Snell brand in 2019. Current product data, installation instructions and certificates are available through Moflash.
How do I choose between YA50 and YL50?
Choose YA50 when an audible signal is required, or YL50 when the design also needs a visual warning. Check the exact voltage, tone, output and approval for the installation.
Does the maximum dB rating tell me how far the alarm will reach?
No. Distance, background noise, barriers and the selected tone affect audibility. Use the model’s tone data and assess the sound level where people need to hear the alarm.
Can any Clifford & Snell unit be installed in a hazardous area?
No. Use a specifically approved hazardous-area model and check its certificate against the area classification. Intrinsically safe variants also need the specified system and barrier arrangement.
Are all lens colours approved for fire alarm use?
Do not assume so. Check the approval and coverage for the exact model, lens colour and supply voltage. General signalling and certified fire alarm variants can differ.
What do I need to order a replacement?
Send the complete part number, voltage and nameplate photo. Include the tone, lens colour, installation environment and any marine or hazardous-area approval required.
Can I use different tones for different alarm stages?
Models such as YA50 and YL50 provide selectable tones and a second alarm stage. Follow the model’s wiring and tone table so each stage gives the intended signal.
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Find Your Sounder or Beacon
Send the part number, voltage, required signal and installation location. We can help identify a suitable variant.