Potter LFH-24W Low Frequency Horn, 520 Hz Temporal 3, Off-White
The Potter LFH-24W is a 520 Hz low frequency sounder with an off-white faceplate. NFPA 72 calls for 520 Hz low frequency signaling in sleeping rooms, because this square-wave tone wakes sleeping occupants much more reliably than a standard high-pitched horn. The LFH sounds it in a temporal 3 pattern.
SKU: LFH-24W
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Product details
The Potter LFH-24W is a 520 Hz low frequency sounder with an off-white faceplate. NFPA 72 calls for 520 Hz low frequency signaling in sleeping rooms, because this square-wave tone wakes sleeping occupants much more reliably than a standard high-pitched horn. The LFH sounds it in a temporal 3 pattern.
Key features
- 520 Hz square wave, temporal 3; temporal 4 available only with a Potter GTSM module
- Normal and loud output settings
- Runs on direct current or full-wave rectified power
- Super-Slide bracket mounts to 4 in. square and gang boxes
- Listed to ANSI/UL 464 and CAN/ULC S525
Ordering note
The LFH-24R is the same sounder in red, and the LFHS-24 series adds a strobe. The 88.3 dBA figure that appears in Potter specification wording is the CAN/ULC anechoic rating at 3 m on the loud setting (per the installation manual), not the UL 464 value listed above.
Specifications
| Model | LFH-24W |
| Color | Off-white |
| Frequency | 520 Hz square wave |
| Patterns | Temporal 3; temporal 4 with GTSM module |
| Output (UL 464, 10 ft, reverberant, temporal 3) | 77.8 dBA normal, 79.8 dBA loud |
| Voltage | 24 VDC nominal, 16 to 33 V range, DC or full-wave rectified |
| Max current (regulated 24 VDC, temporal 3) | 99.4 mA normal, 155.8 mA loud |
| Operating temperature | 32 to 120 °F |
| Wire size | 18 to 12 AWG |
| Dimensions | 6-1/8 x 5-1/2 x 1-5/8 in. |
| Mounting | Super-Slide bracket; 4 in. square and gang boxes |
| Listings | ANSI/UL 464, CAN/ULC S525 |