Siren Signals | McMaster-Carr

	Voltage Voltage

	Volume Volume

	Audible Signal Type Audible Signal Type

Buzzer

Horn

Siren

	Signal Type Signal Type

Audible Alarm

Signal Light with Audible
Alarm

	Power Source Power Source

Electric

Air

	Current Current

	Environment Environment

	Mount Type Mount Type

Screw

Panel

Portable

	Volume Control Volume Control

Fixed

Adjustable

	Sound Pattern Sound Pattern

Continuous

Pulse

	Electrical Connection Type Electrical Connection Type

Wire Leads

Screw Terminals

	Material Material

	Height Height

	Fasteners Included Fasteners Included

Yes

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Width Width

	Depth Depth

	Specifications Met Specifications Met

CFM

CSA

ADA

	Environmental Rating Environmental Rating

IP44

IP54

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

NEC Class I Divisions 1, 2
Groups B, C, D

NEC Class II Division 2
Groups F, G

NEC Class II Divisions 1, 2
Groups E, F, G

NEC Class III Division 2

NEC Class III Divisions
1, 2

NEMA 3R

NEMA 4X

NEMA 12

	Number of Wire Leads Number of Wire Leads

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	Light Color Light Color

	White		Amber
	Blue		Red

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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64 Products

About Sound Levels

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

Mount Style A and B buzzers using outlet boxes (sold separately).

With 2 Wire Leads
	Voltage	Current	Volume	Sound Pattern	Ht.	Wd.	Dp.	Material	Fasteners Included	Includes	For Panel Cutout Height	For Panel Cutout Width	UL File Number		Each
A	24V AC	0.63 A @ 24 V AC	78-103 dBA @ 10 ft.	Continuous	6 1/2"	6 1/2"	1 1/4"	Zinc	Yes	Mounting Plate	4 3/16"	4 3/16"	E4186	0000000	0000000
A	120V AC	0.13 A @ 120 V AC	78-103 dBA @ 10 ft.	Continuous	6 1/2"	6 1/2"	1 1/4"	Zinc	Yes	Mounting Plate	4 3/16"	4 3/16"	E4186	0000000	000000
B	120V AC	0.18 A @ 120 V AC	100 dBA @ 10 ft.	Continuous	4 1/16"	4 1/16"	2 1/8"	Zinc	Yes	__	__	__	__	0000000	000000
With 4 Wire Leads
C	24V DC	0.22 A @ 24 V DC	99 dBA @ 10 ft.	Continuous	4 1/8"	4 1/8"	2 7/8"	Polycarbonate	Yes	Mounting Plate	__	__	__	0000000	000000
With Screw Terminals
B	24V AC	0.63 A @ 24 V AC	78-103 dBA @ 10 ft.	Continuous	5"	5"	2 1/8"	Zinc	Yes	Mounting Plate	__	__	E4186	0000000	000000

Outlet Box for Style B	00000000	Each	00000
Outlet Box for Style A	0000000	Each	00000

Washdown Buzzers

Buzzers meet NEMA 4X for protection and corrosion resistance in washdown environments.

Panel Mount

With 2 Wire Leads
Voltage	Current	Volume	Sound Pattern	Ht.	Wd.	Dp.	Material	For Panel Cutout Ht.	For Panel Cutout Wd.	Fasteners Included	Environmental Rating		Each
24V AC	0.9 A @ 24 V AC	64-80 dB @ 100 ft. 94-100 dB @ 10 ft.	Continuous	5 5/8"	5 5/8"	2 3/8"	Zinc	3 1/8"	3 1/8"	Yes	NEMA 12, NEMA 4X	0000000	0000000
120V AC	0.18 A @ 120 V AC	64-80 dB @ 100 ft. 94-100 dB @ 10 ft.	Continuous	5 5/8"	5 5/8"	2 3/8"	Zinc	3 1/8"	3 1/8"	Yes	NEMA 12, NEMA 4X	0000000	000000
With 4 Wire Leads
24V DC	0.22 A @ 24 V DC	79 dB @ 100 ft. 99 dB @ 10 ft.	Continuous	4 1/8"	4 1/8"	2 7/8"	Polycarbonate	3 1/8"	3 1/8"	Yes	NEMA 4X	0000000	000000

Surface Mount

With Screw Terminals
Voltage	Current	Volume	Sound Pattern	Ht.	Wd.	Dp.	Material	Conduit Size	Thread Type	Fasteners Included	Includes	Environmental Rating		Each
120V AC	0.18 A @ 120 V	100 dB @ 10 ft. 80 dB @ 100 ft.	Continuous	4 1/2"	4 1/2"	3 3/8"	Aluminum	3/4	NPT	Yes	Outlet Box	NEMA 4X	0000000	0000000
With 2 Wire Leads
24V AC	0.9 A @ 24 V AC	74-80 dB @ 100 ft. 94-100 dB @ 10 ft.	Continuous	5 5/8"	5 5/8"	2 3/8"	Zinc	3/4	NPT	Yes	Outlet Box	NEMA 12, NEMA 4X	0000000	000000
With 4 Wire Leads
24V DC	0.22 A @ 24 V DC	79 dB @ 100 ft. 99 dB @ 10 ft.	Continuous	4 3/8"	5"	3 7/8"	Polycarbonate	3/4	NPT	Yes	Outlet Box	NEMA 4X	0000000	000000

Multiple-Tone Buzzers

With 2 Wire Leads
Voltage	Current	Volume	Environment	Sound Pattern	Ht.	Wd.	Dp.	Material	Fasteners Included	Specifications Met		Each
24V AC 24V DC	0.07 A @ 24 V DC 0.22 A @ 24 V AC	0-88 dB @ 10 ft. 0-72 dB @ 100 ft.	Outdoor	Continuous	4 1/2"	4 1/2"	3 1/2"	Plastic	Yes	C-UL Listed, California Fire Marshal Approved, UL Listed	0000000	0000000
120V AC	0.04 A @ 120 V AC	0-88 dB @ 10 ft. 0-72 dB @ 100 ft.	Outdoor	Continuous	4 1/2"	4 1/2"	3 1/2"	Plastic	Yes	C-UL Listed, California Fire Marshal Approved, UL Listed	0000000	000000

Outdoor Outlet Box	00000000	Each	000000
Outlet Box	00000000	Each	0000

Hazardous Location Buzzers

Buzzers are UL Listed for Class I, Divisions 1 and 2, Groups B, C, and D; Class II, Divisions 1 and 2, Groups E, F, and G; and Class III, Divisions 1 and 2 environments where flammable gases, combustible dust, and combustible fibers may be present.

											Mounting Holes
Voltage	Current	Volume	Sound Pattern	Ht.	Wd.	Dp.	Material	Conduit Size	Thread Type	Fasteners Included	No. of	Dia.	Includes		Each
With 3 Wire Leads
24V DC	0.16 A @ 24 V DC	97 dB @ 10 ft. 83 dB @ 100 ft.	Continuous	7 5/8"	7 3/8"	4 1/4"	Zinc	3/4	NPT	No	2	3/8"	Two Mounting Brackets	0000000	000000000
120V AC	0.13 A @ 120 V AC	97 dB @ 10 ft. 83 dB @ 100 ft.	Continuous	7 5/8"	7 3/8"	4 1/4"	Zinc	3/4	NPT	No	2	3/8"	Two Mounting Brackets	0000000	00000000

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	125 dB @ 3.3 ft.	18 1/2"	8"	5"	304 Stainless Steel	No	3	1/4"	0000000	0000000
24V DC	4 A @ 24 V DC	125 dB @ 3.3 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
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

Adjustable-Volume Multiple-Tone Horns

												Mounting Holes
Voltage	Current	Volume	Sound Pattern	Ht.	Wd.	Dp.	Material	Conduit Size	Thread Type	Gender	Fasteners Included	No. of	Dia.		Each
With Screw Terminals
24V AC 24V DC	1.1 A @ 24 V AC 1.1 A @ 24 V DC	0-110 dBA @ 10 ft.	Continuous Pulse	12 1/2"	8"	8 1/2"	Aluminum	1/2	NPT	Female	No	2	3/16"	0000000	0000000
120V AC	0.3 A @ 120 V AC	0-110 dBA @ 10 ft.	Continuous Pulse	12 1/2"	8"	8 1/2"	Aluminum	1/2	NPT	Female	No	2	3/16"	0000000	000000

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

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 dB @ 10 ft. 100 dB @ 100 ft.	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.

Air Horns

Volume	Sound Pattern	Power Source	No. of Uses	Dia.	Lg.	Ht.		Each
95 dBA @ 100 ft. 115 dBA @ 10 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

Multiple-Tone Sirens

Sirens can emit both continuous and pulse tones—pulse tones alternate on/off to draw greater attention than continuous tones.

										Mounting Holes
Voltage	Current	Volume	Environment	Dia.	Dp.	Material	No. of Knockouts	Knockout Trade Size	Fasteners Included	No. of	Dia.	Includes		Each
With Screw Terminals
120V AC, 240V AC	0.01 A @ 240 V AC 0.02 A @ 120 V AC	64-113 dB @ 10 ft. 55-89 dB @ 100 ft.	Outdoor	3 5/8"	2 7/8"	Plastic	3	3/4	No	4	1/4"	Outlet Box	000000000	0000000
9-30V DC	0.03 A @ 24 V DC 0.06 A @ 12 V DC	64-113 dB @ 10 ft. 55-89 dB @ 100 ft.	Outdoor	3 5/8"	2 7/8"	Plastic	3	3/4	No	4	1/4"	Outlet Box	000000000	000000

Motor-Driven Sirens

The built-in motor-driven fan in these sirens generates a shrill tone that's audible over long distances. Sirens emit a continuous tone. They have a shock- and corrosion-resistant housing, so they're approved for use on U.S. Navy ships.

										Mounting Holes
Voltage	Current	Volume	Dia.	Lg.	Material	Conduit Size	Thread Type	Gender	Fasteners Included	No. of	Dia.	Includes	Specifications Met		Each
With 2 Wire Leads
120V DC 120V AC	2.5 A @ 120 V DC 2.5 A @ 120 V AC	113 dB @ 10 ft. 89 dB @ 100 ft.	8 1/2"	15 3/8"	Powder-Coated Aluminum	1/2	NPT	Female	No	2	5/16"	1/2 NPT Threaded Male Conduit Fitting, Mounting Bracket	UL Listed	0000000	0000000
240V DC 240V AC	1.7 A @ 240 V DC 1.7 A @ 240 V AC	113 dB @ 10 ft. 89 dB @ 100 ft.	8 1/2"	15 3/8"	Powder-Coated Aluminum	1/2	NPT	Female	No	2	5/16"	1/2 NPT Threaded Male Conduit Fitting, Mounting Bracket	__	0000000	000000

Sirens

Surface mount using included hardware or an outlet box (sold separately).

For technical drawings and 3-D models, click on a part number.

With Screw Terminals
Voltage	Current	Volume	Environment	Sound Pattern	Ht.	Wd.	Dp.	Material	Fasteners Included		Each
12V DC	0.56 A @ 12 V DC	100 dB @ 10 ft. 81 dB @ 100 ft.	Outdoor	Continuous	5"	5 3/4"	4 3/8"	Plastic	Yes	00000000	000000

Outdoor Outlet Box	00000000	Each	000000
Outlet Box	00000000	Each	0000

Strobe Lights with Siren

For technical drawings and 3-D models, click on a part number.

With Screw Terminals
Voltage	Current	Volume	Environment	Sound Pattern	Ht.	Wd.	Dp.	Material	Fasteners Included	Choose a Light Color		Each
12V DC	0.67 A @ 12 V DC	100 dB @ 10 ft. 80 dB @ 100 ft.	Outdoor	Continuous	7 3/32"	5 3/4"	4 3/8"	Plastic	Yes	Amber, Blue, Red, White	00000000	0000000

Outdoor Outlet Box	00000000	Each	000000
Outlet Box	00000000	Each	0000

Fire Alarms with Strobe Light

In addition to an audible signal, these alarms flash a high-intensity strobe to draw attention during fire emergencies.

Styles E and F have a strobe that helps comply with ADA standards for photosensitivity when properly installed.

Surface mount using an outlet box (sold separately for Styles A-E).

Fire Alarms

With Screw Terminals
	Voltage	Current	Volume	Light Intensity, cp	Ht.	Wd.	Dp.	Material	Fasteners Included	Features	Specifications Met	Choose a Color		Each
A	12V DC	0.43 A @ 12 V DC	76-94 dB @ 10 ft.	15/75	5 1/8"	5 1/8"	4 3/8"	Plastic	Yes	Eight Tones	UL Listed, California Fire Marshal Approved	White	00000000	0000000
B	24V DC	0.33 A @ 24 V DC	76-94 dB @ 10 ft.	15/30/75/110	5 1/8"	5 1/8"	4 3/8"	Plastic	Yes	Eight Tones	UL Listed, California Fire Marshal Approved	Red	00000000	00000
E	24V DC	0.33 A @ 24 V DC	91 dB @ 10 ft.	15/30/75/110	5 1/8"	5 1/8"	4 3/8"	Plastic	Yes	Two Tones	UL Listed, California Fire Marshal Approved, ADA Compliant	Red, White	0000000	000000

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

Fire Alarms for Outdoor Use

With Screw Terminals
	Voltage	Current	Volume	Light Intensity, cp	Ht.	Wd.	Dp.	Material	Knockout Trade Size	Fasteners Included	Features	Specifications Met	Choose a Color		Each
C	120V AC	0.05 A @ 120 V AC	73-85 dB @ 10 ft.	15	4 1/8"	4 1/8"	3 1/2"	Plastic	__	Yes	Eight Tones	UL Listed, California Fire Marshal Approved	Gray	00000000	000000
D	120V AC	0.05 A @ 120 V AC	73-85 dB @ 10 ft.	15	4 1/8"	4 1/8"	3 1/2"	Plastic	__	Yes	Eight Tones	UL Listed, California Fire Marshal Approved	Red	00000000	00000
F	24V DC	0.19 A @ 24 V DC	100 dB @ 10 ft.	75	5 3/4"	4 3/4"	4 3/16"	Plastic	1/2	Yes	Two Tones	UL Listed, California Fire Marshal Approved, ADA Compliant	Red, White	000000	00000

Steel Outlet Box	00000000	Each	00000
Gray Aluminum Outlet Box	00000000	Each	00000
Red Aluminum Outlet Box	00000000	Each	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