Siren Signals | McMaster-Carr

Choose a Category

	Voltage Voltage

24V AC

120V AC

	Audible Signal Type Audible Signal Type


Buzzer	Horn

	Sound Pattern Sound Pattern

Continuous

Pulse

	Volume Control Volume Control

Adjustable

Fixed

	Volume Volume

	Power Source Power Source

Electric

Air

	Mount Type Mount Type

Screw

Panel

Portable

	Environment Environment

Outdoor

Corrosive

Damp

Dusty

Oily

Washdown

Hazardous

	Electrical Connection Type Electrical Connection Type

Screw Terminals

Wire Leads

	Current Current

	Material Material

	Specifications Met Specifications Met

CFM

CSA

	Width Width

	Height Height

	Depth Depth

	Length Length

	Fasteners Included Fasteners Included

Yes

	Environmental Rating Environmental Rating

NEMA 4X

NEMA 12

NEC Class I Division 2
Groups A, B, C, D

NEC Class II Division 2
Groups F, G

NEC Class III Division 2

NEMA 3R

IP44

	Number of Wire Leads Number of Wire Leads

	Conduit Size Conduit Size

1/2

3/4

	Mounting Hole Diameter Mounting Hole Diameter

	Number of Mounting Holes Number of Mounting Holes

	Pipe Size Pipe Size

1/8

1/2

View catalog pages (3)

Forward

How can we improve?

39 Products

About Sound Levels

To choose an alarm or speaker that’s loud enough, first determine the decibel (dB) rating of background noise.

Surface mount using an outlet box (sold separately).

With Screw Terminals
Voltage	Current	Volume	Sound Pattern	Ht.	Wd.	Dp.	Material	Fasteners Included	Includes	Specifications Met		Each
24V AC	0.63 A @ 24 V AC	78-101 dB @ 10 ft. 62-81 dB @ 100 ft.	Continuous	5"	5"	2 1/8"	Zinc	Yes	Mounting Plate	UL Listed	0000000	0000000
24V DC	0.16 A @ 24 V DC	78-101 dB @ 10 ft. 62-81 dB @ 100 ft.	Continuous	5"	5"	2 1/8"	Zinc	Yes	Mounting Plate	UL Listed	0000000	000000
120V AC	0.13 A @ 120 V AC	78-101 dB @ 10 ft. 62-81 dB @ 100 ft.	Continuous	5"	5"	2 1/8"	Zinc	Yes	Mounting Plate	UL Listed	0000000	000000

Outlet Box

00000000

Each

00000

Washdown Buzzers

Buzzers meet NEMA 4X and NEMA 12.

Panel Mount

With 3 Wire Leads
Style	Voltage	Current	Volume	Sound Pattern	Ht.	Wd.	Dp.	Material	For Panel Cutout Ht.	For Panel Cutout Wd.	Fasteners Included	Environmental Rating		Each
A	24V AC	0.63 A @ 24 V AC	78-101 dB @ 10 ft. 62-81 dB @ 100 ft.	Continuous	4 5/8"	4 5/8"	1 7/8"	Zinc	3 3/4"	2 1/2"	Yes	NEMA 12, NEMA 4X	0000000	0000000
A	24V DC	0.16 A @ 24 V DC	78-101 dB @ 10 ft. 62-81 dB @ 100 ft.	Continuous	4 5/8"	4 5/8"	1 7/8"	Zinc	3 3/4"	2 1/2"	Yes	NEMA 12, NEMA 4X	0000000	000000
A	120V AC	0.13 A @ 120 V AC	78-101 dB @ 10 ft. 62-81 dB @ 100 ft.	Continuous	4 5/8"	4 5/8"	1 7/8"	Zinc	3 3/4"	2 1/2"	Yes	NEMA 12, NEMA 4X	0000000	000000

Surface Mount

With Screw Terminals
Style	Voltage	Current	Volume	Sound Pattern	Ht.	Wd.	Dp.	Material	Conduit Size	Thread Type	Fasteners Included	Includes	Environmental Rating		Each
B	24V AC	0.63 A @ 24 V AC	78-101 dB @ 10 ft. 62-81 dB @ 100 ft.	Continuous	4 7/8"	4 7/8"	3 3/8"	Zinc	3/4	NPT	Yes	Outlet Box	NEMA 12, NEMA 4X	0000000	0000000
B	24V DC	0.16 A @ 24 V DC	78-101 dB @ 10 ft. 62-81 dB @ 100 ft.	Continuous	4 7/8"	4 7/8"	3 3/8"	Zinc	3/4	NPT	Yes	Outlet Box	NEMA 12, NEMA 4X	0000000	000000
B	120V AC	0.13 A @ 120 V AC	78-101 dB @ 10 ft. 62-81 dB @ 100 ft.	Continuous	4 7/8"	4 7/8"	3 3/8"	Zinc	3/4	NPT	Yes	Outlet Box	NEMA 12, NEMA 4X	0000000	000000

Trumpet-Style Horns

Electric horns produce a continuous signal; for a noncontinuous signal interrupt the voltage from the power supply.

The 304 stainless steel horns have excellent corrosion resistance.

Air-powered horns operate without electricity.

Electric Powered Horns for Outdoor Use

Electric (304 Stainless Steel)

Electric (Aluminum/Brass)

											Mounting Holes
Voltage	Current	Volume	Lg.	Wd.	Ht.	Material	Conduit Size	Thread Type	Gender	Fasteners Included	No. of	Dia.	Specifications Met		Each
With 2 Wire Leads
12V DC	4 A @ 12 V DC	108 dB @ 10 ft. 87 dB @ 100 ft.	16 1/2"	4"	4 3/4"	304 Stainless Steel	__	__	__	No	4	1/4"	__	0000000	0000000
24V DC	2 A @ 24 V DC	108 dB @ 10 ft. 87 dB @ 100 ft.	16 1/2"	4"	4 3/4"	304 Stainless Steel	__	__	__	No	4	1/4"	__	0000000	000000
24V DC	3 A @ 24 V DC	106 dB @ 10 ft. 86 dB @ 100 ft.	19 3/4"	8"	8"	Aluminum/Brass	1/2	NPT	Female	No	2	3/8"	FM Approved	0000000	000000
With 3 Wire Leads
120V AC	0.75 A @ 120 V AC	105 dB @ 10 ft. 85 dB @ 100 ft.	19 3/4"	8"	8"	Aluminum/Brass	1/2	NPT	Female	No	2	3/8"	CSA Certified, FM Approved, UL Listed	0000000	000000

Air Powered Horns for Outdoor Use

Air Powered

												Mounting Holes
Volume	Sound Pattern	Lg.	Wd.	Ht.	Material	Air Consumption	Operating Pressure	Conduit Size	Thread Type	Gender	Fasteners Included	No. of	Dia.		Each
120 dB @ 10 ft. 100 dB @ 100 ft.	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	0000000
133 dB @ 10 ft. 113 dB @ 100 ft.	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	000000

Dual Trumpet-Style Horns

Electric horns produce a continuous signal; for a noncontinuous signal interrupt the voltage from the power supply. They are 304 stainless steel and have excellent corrosion resistance.

Air-powered horns operate without electricity.

Electric Powered Horns for Outdoor Use

Electric

								Mounting Holes
Voltage	Current	Volume	Lg.	Wd.	Ht.	Material	Fasteners Included	No. of	Dia.		Each
With 4 Wire Leads
12V DC	8 A @ 12 V DC	112 dB @ 10 ft. 92 dB @ 100 ft.	18 1/2"	8"	5"	304 Stainless Steel	No	3	1/4"	0000000	0000000
24V DC	4 A @ 24 V DC	112 dB @ 10 ft. 92 dB @ 100 ft.	18 1/2"	8"	5"	304 Stainless Steel	No	3	1/4"	0000000	000000

Air Powered Horns for Outdoor Use

Air Powered

											Mounting Holes
Volume	Lg.	Wd.	Ht.	Material	Air Consumption	Operating Pressure	Conduit Size	Thread Type	Gender	Fasteners Included	No. of	Dia.		Each
123 dB @ 10 ft. 103 dB @ 100 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

Multiple-Tone Horns

With Screw Terminals
Voltage	Current	Volume	Environment	Sound Pattern	Ht.	Wd.	Dp.	Material	Fasteners Included	Specifications Met		Each
24V DC 120V AC 240V AC	0.6 A @ 24 V DC 0.21 A @ 120 V AC 0.12 A @ 240 V AC	107-111 dB @ 10 ft. 86-90 @ 100 ft.	Outdoor	Continuous	9"	12 1/8"	14 1/2"	Plastic	Yes	C-UL Listed, UL Listed	0000000	0000000

Outdoor Outlet Box	00000000	Each	000000
Outlet Box	00000000	Each	0000

Hazardous Location Multiple-Tone Horns

Horns are UL and C-UL listed for indoor and outdoor use in Class I, Division 2, Groups A, B, C, and D; Class II, Division 2, Groups F and G, and Class III, Division 2 hazardous locations.

Horn with four programmable tones lets you select up to four tones, each corresponding to a different warning. If multiple signals are triggered at once, only the highest priority signal will sound.

												Mounting Holes
No. of Programmable Tones	Voltage	Current	Volume	Sound Pattern	Ht.	Wd.	Dp.	Material	No. of Knockouts	Knockout Trade Size	Fasteners Included	No. of	Dia.		Each
With 3 Wire Leads
1	120V AC 240V AC 120V DC 240V DC	0.31 A @ 120 V AC 0.2 A @ 240 V AC 0.2 A @ 120 V DC 0.1 A @ 240 V DC	95-110 dB @ 10 ft. 85-89 dB @ 100 ft.	Continuous, Pulse	13 3/4"	8"	8 3/4"	Zinc	3	1/2	No	4	3/16"	0000000	000000000
4	120V AC 240V AC 120V DC 240V DC	0.31 A @ 120 V AC 0.2 A @ 240 V AC 0.2 A @ 120 V DC 0.1 A @ 240 V DC	95-110 dB @ 10 ft. 85-89 dB @ 100 ft.	Continuous, Pulse	13 3/4"	8"	8 3/4"	Zinc	3	1/2	No	4	3/16"	0000000	00000000

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.

Air Horns

Volume	Sound Pattern	Power Source	No. of Uses	Dia.	Lg.	Ht.		Each
125 dB @ 10 ft. 105 dB @ 100 ft.	Continuous	Air	150	2 3/4"	4 1/2"	7 1/2"	0000000	000000

Replacement Projector	0000000	Each	00000
Replacement Propellant Canister	0000000	Each	00000

Air Horn Storage Cabinets

Cabinet										Replacement Cover		Replacement Rod
Ht.	Wd.	Dp.	Material Thick.	Material	Color	Fasteners Included	Includes		Each		Each		Each
10 1/4"	5 1/2"	4 1/2"	0.04"	Steel	Yellow	Yes	Padlock, Two Keys	0000000	000000	0000000	000000	0000000	00000

Fire Alarms

Surface mount using an outlet box (sold separately).

With Screw Terminals
Style	Voltage	Current	Volume	Environment	Ht.	Wd.	Dp.	Material	Color	Fasteners Included	Specifications Met		Each
A	12V DC 24V DC	0.11 A @ 24 V DC 0.18 A @ 12 V DC	76-94 dB @ 10 ft.	Outdoor	5 1/8"	5 1/8"	2 1/8"	Plastic	Red	Yes	UL Listed, California Fire Marshal Approved	00000000	000000
A	12V DC 24V DC	0.11 A @ 24 V DC 0.18 A @ 12 V DC	76-94 dB @ 10 ft.	Outdoor	5 1/8"	5 1/8"	2 1/8"	Plastic	White	Yes	UL Listed, California Fire Marshal Approved	00000000	00000
B	120V AC	0.05 A @ 120 V AC	75-88 dB @ 10 ft.	Outdoor	4 1/8"	4 1/8"	2 1/8"	Plastic	Gray	Yes	UL Listed, California Fire Marshal Approved	00000000	00000
B	120V AC	0.05 A @ 120 V AC	75-88 dB @ 10 ft.	Outdoor	4 1/8"	4 1/8"	2 1/8"	Plastic	Red	Yes	UL Listed, California Fire Marshal Approved	00000000	00000

Steel Outlet Box	00000000	Each
White Plastic Outlet Box	000000000	Each
Red Plastic Outlet Box	000000000	Each
Gray Aluminum Outlet Box	00000000	Each
Red Aluminum Outlet Box	00000000	Each

Terms and Conditions and Privacy Policy