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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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 |
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 |
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 |
Steam 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 | 000000 |
| 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 |
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 |
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.
