HOME - Low pitch fire alarm for deep sleepers and high frequency loss Loud, Low Frequency Smoke Alarms    
For High Frequency Loss and Deep Sleepers
"When 9 volt battery alarms aren't enough."




Specifications




The Loudenlow Model NPN (Loudenlow Original):

Low frequency smoke alarm

~Frequency: 240-260 Hz (Middle C is 262 Hz) [Device has multiple frequencies at various ranges including approx. 500Hz and 1000Hz.]

~Sound output: 87dB @ 6" (standard dBA weighing).   This low frequency carries better than standard alarms.

~Meets NFPA 72 National Fire Alarm Code [72,6-3] sound decibel levels

~Detection method: Uses U.L. listed ionization chamber and detection circuitry (industry standard)

~Dimensions: Chassis: 6.5" x 8" x 2" deep, disc alarm: 4" diameter, 1.5" deep

~Weight: 3 lbs

~Mounting: #6 screw (included)

~Power source: Six alkaline AA batteries (not included)

~Audio source: POWER F.E.T. and six-inch dynamic speaker.

~Power consumption: 1000 milliamps in alarm mode (9 watts)

~Battery life: Recommend replacing every 12 months

~Low Battery Alert: Sounds low-frequency chirp every 30 seconds.





The Loudenlow Model 520:

Low frequency smoke alarm

~Frequency: 520 Hz Square Wave [Falls within 505 Hz to 525 Hz range.]

~Sound output: 85dB @ 6" (standard dBA weighing).   This low frequency carries better than standard alarms.

~Meets NFPA 72 National Fire Alarm Code [72,6-3] sound decibel levels

~Detection method: Uses U.L. listed ionization chamber and detection circuitry (industry standard)

~Dimensions: Chassis: 6.5" x 8" x 2" deep, disc alarm: 4" diameter, 1.5" deep

~Weight: 3 lbs

~Mounting: #6 screw (included)

~Power source: Six alkaline AA batteries (not included)

~Audio source: POWER F.E.T. and six-inch dynamic speaker.

~Power consumption: 1000 milliamps in alarm mode (9 watts)

~Battery life: Recommend replacing every 12 months

~Low Battery Alert: Sounds low-frequency chirp every 30 seconds.


This device complies with FCC regulations for electronic consumer devices.







=== 360 DEGREE IMAGES ===

360 degree GIF image (260k download)    

Same, seen as AVI video (360k download).




OUR SMOKE ALARMS:
Frequency Friendly
About 250Hz - around "Middle C".   Easier to hear than store-bought alarms.  Listen now
Powerful
Considerably louder than regular alarms.   Uses 6 inch speaker.
Easy To Install
Mounts to any wall with one screw.
No Wiring
    Fully battery powered.   6 "AA"s generate over 1,000 milliamps
Reasonably priced
Less than many comparable products.   See the order page for current specials.
Easy to order
Order online or via mail by check, money order or credit card.


30 day return policy.
3 year limited warranty.





Attention researchers and students: If you are interested in a Loudenlow to use in a sleep study, hearing study, or other research project please don't hesitate to let us know.   We are happy to provide you with Loudenlows (as available) to utilize.