Buzzer Alarms | McMaster-Carr

	Voltage Voltage

12V AC

24V AC

30 to 120V AC

	Signal Type Signal Type

Audible Alarm

Signal Light with Audible
Alarm

	Sound Pattern Sound Pattern

Continuous

Pulse

Fast Pulse

	Mount Type Mount Type

Panel

Screw

Portable

	Volume Control Volume Control

Fixed

Adjustable

	Electrical Connection Type Electrical Connection Type

	Power Source Power Source

Electric

Battery

	Volume Volume

	Material Material

	Current Current

	Environment Environment

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

DFARS Specialty Metals
COTS-Exempt

	Depth Depth

	Diameter Diameter

	Height Height

	Width Width

	Number of Wire Leads Number of Wire Leads

	For Panel Cutout Diameter For Panel Cutout Diameter

3/4"

1 1/8"

1 1/4"

	Fasteners Included Fasteners Included

Yes

	Specifications Met Specifications Met

CFM

	Number of Mounting Holes Number of Mounting Holes

	Environmental Rating Environmental Rating

NEMA 4X

NEMA 12

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

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

NEC Class III Divisions
1, 2

IP44

	Mounting Hole Thread Size Mounting Hole Thread Size

6-32

8-32

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56 Products

About Sound Levels

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

Styles A and C are also known as piezo buzzers.

For Styles B and C, the volume increases as voltage increases.

Buzzers with a pulse tone alternate on/off to draw greater attention than buzzers with a continuous tone.

Buzzers with both a continuous and pulse tone can be wired to trigger two alerts, each corresponding to a different warning. If the continuous and pulse tone are both triggered at the same time, only the continuous tone will sound.

										Mounting Holes
Style	Voltage	Current	Volume	Sound Pattern	For Panel Cutout Dia.	Dia.	Dp.	Material	Fasteners Included	No. of	Dia.	Specifications Met		Each
With Screw Terminals
A	1-28V DC	0.015 A @ 24 V DC	78 dB @ 10 ft.	Continuous	1 1/8"	1 3/4"	1 3/4"	Plastic	__	__	__	__	00000000	000000
A	3-15V DC	0.02 A @ 12 V DC	70 dB @ 10 ft.	Pulse	1 1/8"	1 3/4"	1 3/4"	Plastic	__	__	__	__	00000000	00000
A	3-28V DC	0.04 A @ 24 V DC	75 dB @ 10 ft.	Continuous	1 1/8"	1 3/4"	1 3/4"	Plastic	__	__	__	__	00000000	00000
A	4-16V DC	0.02 A @ 12 V DC	70 dB @ 10 ft.	Fast Pulse	1 1/8"	1 3/4"	1 3/4"	Plastic	__	__	__	__	00000000	00000
A	4-28V DC	0.022 A @ 24 V DC	60 dB @ 10 ft.	Fast Pulse	1 1/8"	1 3/4"	1 3/4"	Plastic	__	__	__	__	00000000	00000
A	4-28V DC	0.022 A @ 24 V DC	60 dB @ 10 ft.	Pulse	1 1/8"	1 3/4"	1 3/4"	Plastic	__	__	__	__	00000000	00000
A	4-28V DC	0.03 A @ 24 V DC 0.04 A @ 24 V DC	65 dB @ 10 ft.	Continuous, Pulse	1 1/8"	1 3/4"	1 3/4"	Plastic	__	__	__	__	00000000	00000
A	30-120V AC	0.03 A @ 110 V AC	60 dB @ 10 ft.	Pulse	1 1/8"	1 3/4"	2 3/8"	Plastic	__	__	__	__	00000000	00000
A	30-120V AC	0.03 A @ 120 V AC	70 dB @ 10 ft.	Continuous	1 1/8"	1 3/4"	2 3/8"	Plastic	__	__	__	__	00000000	00000
A	60-250V AC	0.03 A @ 240 V AC	60 dB @ 10 ft.	Pulse	1 1/8"	1 3/4"	2 3/8"	Plastic	__	__	__	__	00000000	00000
A	60-250V AC	0.03 A @ 240 V AC	70 dB @ 10 ft.	Continuous	1 1/8"	1 3/4"	2 3/8"	Plastic	__	__	__	__	00000000	00000
B	6-28V DC	0.018 A @ 24 V DC 0.01 A @ 12 V DC	53-71 dB @ 10 ft.	Continuous	1 1/8"	1 1/2"	1 3/4"	Plastic	__	__	__	__	0000000	00000
B	6-28V DC	0.018 A @ 24 V DC 0.01 A @ 12 V DC	53-71 dB @ 10 ft.	Pulse	1 1/8"	1 1/2"	1 3/4"	Plastic	__	__	__	__	0000000	00000
With 2 Wire Leads
C	3-28V DC	0.02 A @ 28 V DC	48-80 dB @ 10 ft.	Continuous	3/4"	1"	3/4"	Plastic	No	2	0.13"	UL Recognized Component	0000000	00000
C	5-28V DC	0.02 A @ 24 V DC	62-84 dB @ 10 ft.	Continuous	1 1/4"	1 1/2"	1"	Plastic	No	2	0.13"	__	0000000	00000
With 3 Wire Leads
C	5-28V DC	0.02 A @ 24 V DC	62-84 dB @ 10 ft.	Continuous, Pulse	1 1/4"	1 1/2"	1"	Plastic	No	2	0.13"	__	0000000	00000

Surface-Mount Miniature Buzzers

											Mounting Holes
Style	Voltage	Current	Volume	Sound Pattern	Dia.	Ht.	Wd.	Dp.	Material	Fasteners Included	No. of	Dia.	Thread Size	Includes		Each
With Lug Terminals
A	12V AC	0.6 A @ 12 V AC	64 dB @ 10 ft.	Continuous	__	1 1/4"	1"	7/8"	Plastic	No	1	__	6-32	Mounting Bracket	00000000	000000
A	24V AC	0.6 A @ 24 V AC	64 dB @ 10 ft.	Continuous	__	1 1/4"	1"	7/8"	Plastic	No	1	__	6-32	Mounting Bracket	00000000	00000
A	120V AC	0.6 A @ 120 V AC	64 dB @ 10 ft.	Continuous	__	1 1/4"	1"	7/8"	Plastic	No	1	__	6-32	Mounting Bracket	00000000	00000
A	240V AC	0.6 A @ 240 V AC	64 dB @ 10 ft.	Continuous	__	1 1/4"	1"	7/8"	Plastic	No	1	__	6-32	Mounting Bracket	00000000	00000
With 2 Wire Leads
B	3-15V DC	0.01 A @ 12 V DC	71 dB @ 10 ft.	Continuous	__	1 3/4"	1 1/8"	7/8"	Plastic	No	2	0.14"	__	__	00000000	0000
C	9-15V DC	0.025 A @ 12 V DC	55 dB @ 10 ft.	Continuous	__	1 1/4"	5/8"	5/8"	Plastic	No	2	0.1"	__	__	00000000	0000
C	15-27V DC	0.03 A @ 24 V DC	55 dB @ 10 ft.	Continuous	__	1 1/4"	5/8"	5/8"	Plastic	No	2	0.1"	__	__	00000000	0000
D	24V AC	0.2 A @ 24 V AC	86 dB @ 10 ft.	Continuous	2 1/8"	__	__	1 1/4"	Steel	No	1	__	8-32	Mounting Bracket	0000000	00000
D	120V AC	0.04 A @ 120 V AC	86 dB @ 10 ft.	Continuous	2 1/8"	__	__	1 1/4"	Steel	No	1	__	8-32	Mounting Bracket	0000000	00000
With 1 Wire Leads
D	12V DC	0.07 A @ 12 V DC	86 dB @ 10 ft.	Continuous	2 1/8"	__	__	1 1/4"	Steel	No	1	__	8-32	Mounting Bracket	0000000	00000

Surface-Mount Buzzers

Surface mount using an outlet box (sold separately).

With Screw Terminals
Voltage	Current	Volume	Sound Pattern	Dia.	Dp.	Material	Fasteners Included	Includes	Specifications Met		Each
24V AC	0.25 A @ 24 V AC	70 dB @ 10 ft.	Continuous	5 1/8"	2 1/4"	Epoxy-Coated Steel	Yes	Mounting Plate	FM Approved, UL Listed	000000000	0000000
24V DC	0.15 A @ 24 V DC	62 dB @ 10 ft.	Continuous	5 1/8"	2 1/4"	Epoxy-Coated Steel	Yes	Mounting Plate	__	00000000	000000
120V AC	0.05 A @ 120 V AC	70 dB @ 10 ft.	Continuous	5 1/8"	2 1/4"	Epoxy-Coated Steel	Yes	Mounting Plate	FM Approved, UL Listed	000000000	000000

Outlet Box

00000000

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

Buzzers

Surface mount Style A buzzers using an outlet box (sold separately).

With Screw Terminals
	Voltage	Current	Volume	Sound Pattern	Ht.	Wd.	Dp.	Material	Fasteners Included	Includes	Specifications Met		Each
A	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
With 2 Wire Leads
A	120V AC	0.18 A @ 120 V	100 dB @ 10 ft. 80 dB @ 100 ft.	Continuous	4 1/16"	4 1/16"	2 1/8"	Zinc	Yes	__	UL Listed	0000000	000000
With 4 Wire Leads
B	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	Yes	Mounting Plate	UL Listed	0000000	000000

Outlet Box

00000000

Each

00000

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

Water Overflow Buzzers

When water contacts the sensor, it triggers a buzzer to alert personnel to a leak or overflow hazard. Frequently used to monitor sinks, pipe lines, tubs, and sump pumps.

Volume	Sound Pattern	Ht.	Wd.	Dp.	Cord Lg., ft.	Material	Batteries Included	No. of Batteries Required	Battery Size	Includes		Each
83 dB @ 10 ft. 62 dB @ 100 ft.	Pulse	3 1/4"	2 1/4"	7/8"	5	Plastic	No	3	AAA	Hook and Loop Mounting Tape	0000000	000000

Wi-Fi Enabled Water Overflow and Freeze Detectors

Keep an eye on leaks, overflow, and temperature changes near your equipment, even when you’re offsite. These detectors connect to your Wi-Fi to send alerts about moisture, temperature, and humidity to your smartphone or tablet. Place them near tanks and tubs to watch for overflow, or near sump pumps and pipe lines to monitor temperatures and prevent frozen pipes. When water touches one of the sensors on the detector, a buzzer also goes off, alerting anyone nearby. Rated IP44, these detectors are protected from objects larger than 1mm, such as wires, and from water splashing in any direction.

Download an app onto your smart device to program temperature and humidity ranges and set up alerts. You can also create reports that show changes in temperature and humidity over time.

To extend the area they monitor, these detectors come with a detachable cable sensor that senses moisture along its entire surface. Swap in replacement cable sensors for worn sensors, or link several together to wrap around large equipment or trace the path of a pipe. Extend them up to 500 feet from detectors.

Detectors

Detector

Detector (Bottom)

Each

Volume	Sound Pattern	Wd.	Ht.	Dp.	Cord Lg., ft.	Material	Batteries Included	Sensor Location	Operating System Compatibility	Includes		Each
100 dB @ 1 ft.	Continuous	3"	3"	1 1/4"	5	Plastic	Yes	Bottom	Android 4.3 or Later, iOS 8 or Later	Detachable Cable Sensor, Mounting Screws	0000000	000000

Package

Volume	Sound Pattern	Wd.	Ht.	Dp.	Cord Lg., ft.	Material	Batteries Included	Sensor Location	Operating System Compatibility	Includes	Pkg. Qty.		Pkg.
100 dB @ 1 ft.	Continuous	3"	3"	1 1/4"	5	Plastic	Yes	Bottom	Android 4.3 or Later, iOS 8 or Later	Detachable Cable Sensor, Mounting Screws	4	0000000	0000000

Replacement Cable Sensors

Replacement Cable Sensor

Lg., ft.		Each
5	0000000	000000

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	000000

Miniature Flashing Lights with Buzzer

Volume increases as voltage increases.

The light with a pulse tone alternates on/off to draw greater attention than the light with a continuous tone.

With Screw Terminals
Voltage	Current	Volume	Sound Pattern	For Panel Cutout Dia.	Dia.	Dp.	Material	Light Color	Fasteners Included		Each
6-28V DC	0.016 A @ 12 V DC 0.03 A @ 24 V DC	53-71 dB @ 10 ft.	Continuous	1 1/8"	1 1/2"	1 3/4"	Plastic	Red	No	0000000	000000
6-28V DC	0.016 A @ 12 V DC 0.03 A @ 24 V DC	53-71 dB @ 10 ft.	Pulse	1 1/8"	1 1/2"	1 3/4"	Plastic	Red	No	0000000	00000

Scheduling Timers

Program this timer to trigger an audible signal for events throughout the week such as lunch and break times. It has a keypad for scheduling events and adjusting the signal duration. Keypad has a user-defined security code to restrict access. The backup battery saves programmed data and lasts for 10 years. It does not power the timers.

Timer

Max. No. of Events per Week	For Max. No. of Alarms	Alarm Duration	Ht.	Wd.	Dp.	Material	Color	Time Convention	Electrical Connection Type	Current, A	Voltage	Backup Battery Life		Each
9,999	9,999	1-9 Seconds, Continuous	8 1/2"	11"	6 1/2"	Polycarbonate Plastic	Gray	12 Hour, 24 Hour	Hardwire	2.5	120V AC	10 yrs.	0000000	000000000

Replacement Backup Battery (1 per Pkg.)

0000000

Pkg.

00000

Bell

Dia.	Volume	Current, A	Voltage	For Use Outdoors	Mounting Hardware Included		Each
6"	86 dB @ 10 ft.	0.085	120V AC	Yes	Yes	0000000	000000

Buzzer

Wd.	Ht.	Volume	Current, A	Voltage	For Use Outdoors	Mounting Hardware Included		Each
4"	4"	95 dB @ 10 ft.	0.16	120V AC	Yes	Yes	0000000	000000

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About Sound Levels

Panel-Mount Miniature Buzzers

Surface-Mount Miniature Buzzers

Surface-Mount Buzzers

Washdown Buzzers

Buzzers

Multiple-Tone Buzzers

Water Overflow Buzzers

Wi-Fi Enabled Water Overflow and Freeze Detectors

Hazardous Location Buzzers

Miniature Flashing Lights with Buzzer

Scheduling Timers