About Sound Levels
To choose an alarm or speaker that’s loud enough, first determine the decibel (dB) rating of background noise.
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Air Horns
This horn has a disposable canister that can be replaced when the propellant is gone.
Air horn storage cabinet includes a tamperproof safety-lock rod.These horns have disposable canisters that can be replaced when the propellant is gone.
Rechargeable Air Horns

When this horn runs out of air, recharge it with the included pump.
Volume | Sound Pattern | Power Source | No. of Uses | Dia. | Lg. | Ht. | Includes | Each | |
120 dBA @ 1 m 115 dBA @ 2 m 107 dBA @ 5 m 103 dBA @ 10 m | Continuous | Air | 30 | 2" | 6 1/2" | 9 1/2" | Recharge Pump | 0000000 | 000000 |
Disposable Air Horns

Toss this pocket-size air horn when it runs out of air.
Volume | Sound Pattern | Power Source | No. of Uses | Dia. | Lg. | Ht. | Each | |
115 dBA @ 3.3 ft. | Continuous | Air | 150 | 1 3/8" | 4 1/4" | 5 3/8" | 0000000 | 000000 |
Trumpet-Style Horns
Air-powered horns operate without electricity.

Mounting Holes | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Volume | Sound Pattern | Lg. | Wd. | Ht. | Material | Air Consumption | Operating Pressure | Conduit Size | Thread Type | Gender | Fasteners Included | No. of | Dia. | Each | |
139 dBA @ 1 m | Continuous | 10 1/8" | 6 3/4" | 8 5/8" | Aluminum | 0.5 cfs @ 100 psi | 50-150 psi | 1/2 | NPT | Female | No | 4 | 9/16" | 0000000 | 0000000 |
131 dBA @ 1 m | Continuous | 17 1/8" | 6 3/4" | 6 7/8" | Brass/Bronze | 0.2 cfs @ 100 psi | 50-200 psi | 1/8 | NPT | Female | No | 2 | 5/16" | 0000000 | 000000 |
Dual Trumpet-Style Horns
Air-powered horns operate without electricity.

Mounting Holes | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Volume | Lg. | Wd. | Ht. | Material | Air Consumption | Operating Pressure | Conduit Size | Thread Type | Gender | Fasteners Included | No. of | Dia. | Each | |
133 dBA @ 3.3 ft. | 22 3/4" | 11 5/8" | 7 1/4" | Brass/Bronze | 0.3 cfs @ 100 psi | 50-200 psi | 1/8 | NPT | Female | No | 4 | 5/16" | 0000000 | 0000000 |
Long-Distance Whistles

Apply air or steam pressure to produce a shrill tone and alert workers. Signal continues as long as pressure is applied.
Volume | Environment | Sound Pattern | Dia. | Ht. | Material | Air Consumption | Operating Pressure | Max. Input Pressure | Conduit Size | Thread Type | Gender | Each | |
Air or Steam Powered | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
132 dBA @ 1 m | Outdoor | Continuous | 1" | 4 1/2" | Brass/Bronze | 0.9 cfs @ 100 psi | 50-200 psi | 200 psi @ 550° F | 1/4 | NPT | Female | 0000000 | 0000000 |
132 dBA @ 1 m | Outdoor | Continuous | 3" | 13" | Brass/Bronze | 4.6 cfs @ 100 psi | 50-200 psi | 200 psi @ 550° F | 3/4 | NPT | Female | 0000000 | 000000 |
124 dBA @ 1 m | Outdoor | Continuous | 1 1/2" | 9" | Brass/Bronze | 1.4 cfs @ 100 psi | 50-200 psi | 200 psi @ 550° F | 3/8 | NPT | Female | 0000000 | 000000 |
142 dBA @ 1 m | Outdoor | Continuous | 6" | 25" | Brass/Bronze/Stainless Steel | 14 cfs @ 100 psi | 50-200 psi | 200 psi @ 550° F | 1 1/2 | NPT | Female | 0000000 | 00000000 |
122 dBA @ 1 m | Outdoor | Continuous | 2" | 11 1/4" | Brass/Bronze | 3.7 cfs @ 100 psi | 50-200 psi | 200 psi @ 550° F | 1/2 | NPT | Female | 0000000 | 000000 |
Long-Distance Whistles with Valve

The quick-opening valve on these whistles allows manual operation—pull the valve while air or steam pressure is being applied to produce a shrill tone and alert workers. The valve has a hole for attaching chain.
Volume | Environment | Sound Pattern | Dia. | Ht. | Material | Air Consumption | Operating Pressure | Max. Input Pressure | Conduit Size | Thread Type | Gender | Each | |
Air Powered | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
132 dBA @ 1 m | Outdoor | Continuous | 1" | 7" | Brass/Bronze | 0.9 cfs @ 100 psi | 50-200 psi | 200 psi @ 550° F | 1/4 | NPT | Female | 0000000 | 0000000 |
132 dBA @ 1 m | Outdoor | Continuous | 3" | 17 3/4" | Brass/Bronze | 4.6 cfs @ 100 psi | 50-200 psi | 200 psi @ 550° F | 3/4 | NPT | Female | 0000000 | 000000 |
124 dBA @ 1 m | Outdoor | Continuous | 1 1/2" | 12" | Brass/Bronze | 1.4 cfs @ 100 psi | 50-200 psi | 200 psi @ 550° F | 3/8 | NPT | Female | 0000000 | 000000 |
122 dBA @ 1 m | Outdoor | Continuous | 2" | 15 1/2" | Brass/Bronze | 3.7 cfs @ 100 psi | 50-200 psi | 200 psi @ 550° F | 1/2 | NPT | Female | 0000000 | 000000 |