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Exceder LED3 low frequency sounders and sounder strobes

Eaton designed the Wheelock Exceder LED3 low frequency sounder strobes (LFHSK3/LFHSH3) and sounders (LFHNK3) to meet dual sleeping room codes - NFPA 72 for fire alarm and NFPA 720 for Carbon Monoxide (CO) alarm in a single device. The low frequency sounders and sounder  strobes can replace a facility’s existing appliances, utilizing the same single pair of wires that are currently installed, offering a simple retrofit to meet new codes for sleeping rooms. 

Wheelock Exceder LED3 low-frequency sounders and sounder strobes center view
Strobe Candela
110 or 177
4 Settings in 1 Device
T3, T4, Continuous, T3/T4

110 & 177 Candela Models

Low frequency sounder strobe models are available for both low (110) and high (177) candela settings to meet NFPA sleeping room requirements for hotels, motels, dormitories, and apartment buildings.

Meets NFPA 72’s 20 ms light pulse duration requirements

By meeting this latest requirement, Wheelock xenon and Exceder LED3 devices can now be in the same field of view. With the Exceder LED3 line, Eaton now offers a full range of products with low and high candela settings ideal for both retrofits and new construction.

Low profile design

One of the smallest footprints in the industry with an aesthetically pleasing, modern design that does not distract from building decor. Profile extends less than 2" from the wall.

Customer success story

Apartments upgraded with Exceder LED low frequency sounders to meet sleeping room code requirements
Approvals & Compliance

Want to learn more about low frequency sounder codes and solutions?

Wheelock Exceder LED3 Product Video

Introduction to the Exceder LED3 product line by Eaton

View the rest of the Exceder LED3 product line

How to buy from Eaton
Contact us

Customer Support


Phone: 1-800-631-2148, Option 2

Fax: 1-800-232-6066 

Questions before you buy

Technical Support


Phone: 1-800-631-2148, Option 3

Fax: 941-487-2397