Alarms | McMaster-Carr

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System of Measurement

Voltage

Power Source

Audible Signal Type

Volume (Sound) @ Distance

70 dBA to 80 dBA @ 3.3 ft.

Environment

High-Pressure Washdown

Electrical Connection

3.5 mm Audio

8-Pin Humidity Probe

F-Type

Flat-Pin Mini Thermocouple Connector

Light Color

Amber/Blue/Green/Red/White

Blue/Green/Red/White/Yellow

Blue/Green/Red/Yellow

Diameter

Sound Pattern

Current @ Voltage

Material

Mount Type

Volume Control

Color

Amber/Blue/Green/Red/White

Blue/Green/Red/White/Yellow

Blue/Green/Red/Yellow

RoHS

Compliant with Exemptions

REACH

Height

Number of Wire Leads

DFARS Specialty Metals

Alert Type

Mobile App Notification

Signal Light

Signal Light with Audible Alarm

Sound

Strobe Light with Audible Alarm

Vibrating Alarm

Warning Light

Export Control Classification Number (ECCN)

Enclosure Rating

Certification

C-UL Recognized Component

California Fire Marshal Approved

UL Recognized Component

ULC Listed

Light Pattern Setting

Number of Lights

912 Products

Communication

Audible Alarms

Everything from bells and whistles to horns and sirens

149 products

Audible Alarm Guards

Protect alarm bells from damage

1 product

Audible Alarms/Indicator Lights

Alert people with both light and sound

64 products

Indicator Lights

Call attention to hazards and changes in status with flashing, strobe, and other lights

235 products

Sump Pump Alarms

Warn you when water levels in your sump pump rise too high

1 product

Traffic Lights

Signal and direct traffic

11 products

Aircraft Signal Lights

Mount to the top of towers to warn low-flying aircraft

2 products

Scheduling Timers

Program to signal routine events throughout the week, such as lunch and breaks

1 product

Measuring and Inspecting

Wristwatches

Display the time, date, and smart functions on your wrist and keep your hands free

2 products

Timers

Count up or down to measure a period of time

26 products

Stopwatches

Track time or record an event from start to finish

8 products

Temperature and Humidity Meters

Simultaneously measure temperature and relative humidity

1 product

Thermometers

Monitor temperature in tanks, pipes, control panels, and other equipment

4 products

Vibration Meters

Spot-check vibration to gauge the health of your machine

1 product

Vibration Monitors

Mount to your machine to continuously monitor vibration and ensure it stays within the proper range

10 products

Static Charge Meters

Locate and accurately measure static charges in environments with sensitive electronic equipment

2 products

Radiation Detectors

Test for radiation, even in low amounts or from microwave ovens

5 products

Gas Leak Detectors

Find gas leaks in pipes, tubes, fittings, tanks, cylinders, and valves

6 products

Leak-Detecting Pipe Flange Covers

Wrap around pipe flanges to show when there's a leak and contain it

39 products

Sound Level Meters

Measure noise levels to determine if an area requires hearing protection

9 products

Barometers

Measure atmospheric pressure changes

6 products

Thickness Gauges

Move the thumb lever to quickly check the thickness of flat stock, pipe, or tubing

6 products

Data Recorders

Log temperature, humidity, or pressure levels to track changes and troubleshoot your system

18 products

Force Gauges

Test objects to see how much tension and compression force they can bear

7 products

Safety Equipment

Smoke Detectors

Warn people when there's smoke in your facility

6 products

Smoke Detector Test Stations

Test hard-to-reach HVAC smoke detectors from a convenient location

1 product

Smoke Detector Guards

Protect smoke detectors from damage and tampering

1 product

Smoke Detector Testers

Simulate fire conditions with spray smoke to ensure smoke detectors are working

2 products

Fire Alarms

Alert people to fires with loud warnings

10 products

Fire Extinguisher Alarms

Discourage theft and vandalism by sounding an alarm if anyone moves your fire extinguisher

1 product

Fire Alarm Pull Stations

Activate to send a signal to your control panel if there's a fire

3 products

Fire Alarm Station Covers

Shield your fire alarm pull stations from damage and tampering

4 products

Heat Detectors

Signal your control panel when the temperature rises above a set level

5 products

Carbon Dioxide Meters

Measure and display real-time carbon dioxide levels for indoor ventilation quality

1 product

Methane Detectors

Alarms and lights alert you to the presence of methane instantly or after a set exposure time

1 product

Propane Detectors

Alarms and lights alert you to the presence of propane instantly or after a set exposure time

1 product

Carbon Monoxide Detectors

Alarms, lights, or color changes alert you to the presence of carbon monoxide

8 products

Multi-Gas Detectors

Monitor air for carbon monoxide and combustible gases including methane, hydrogen, and propane

3 products

Oxygen Detectors

Too much or too little oxygen triggers alarms and warning lights

3 products

Heat Stress Monitors

Measure temperature, humidity, and radiant heat to keep people safe from heat-related hazards

4 products

Sound Level Monitors

Continuously measure ambient sound levels to confirm they fall within your programmed thresholds

5 products

Hydrogen Sulfide Detectors

Alarms and lights alert you to high levels of hydrogen sulfide

6 products

Hydrogen Detectors

Alarms and lights alert you to the presence of hydrogen

2 products

Fall-Arrest Lanyards

Clip to your harness and an anchor to stop you from hitting the ground if you fall

1 product

Electrical

Control Panels

Connect and monitor your fire alarm system

1 product

Magnetic Switches

Actuate when a magnet comes within sensing distance; often used to detect when doors or windows open

16 products

Vibration Switches

Monitor vibration in machinery and shut it down or sound an alarm if levels rise

4 products

Outlet Strips

Plug in multiple devices to power them from a single outlet

1 product

Power Receptacles

Install in a wall or panel to transmit power to plugs or sockets

5 products

Facility and Grounds Maintenance

Faucet Timers

Count down to encourage effective handwashing that helps prevent the spread of illness

1 product

Heating, Ventilation, and Air Conditioning

HVAC Flame Detectors

Replace flame detectors in HVAC equipment such as furnaces, ovens, water heaters, and boilers

1 product

Thermostats

Connect to heaters, fans, and air conditioners to control the temperature

3 products

Air Filters

Trap dust and debris in HVAC, exhaust, and electronics systems to improve efficiency and air quality

2 products

Fluid Handling

Pressure Transmitter Displays

Remotely view pressure readings sent from a transmitter

1 product

Differential Pressure and Vacuum Gauges

Show changes in pressure and vacuum to monitor fans, blowers, and filters

6 products

Water Detectors

Place near tanks, sump pumps, and pipe lines to alert you to water leaks

1 product

Drain Valves

Vent air or discharge liquids to remove excess fluid from your system

2 products

Building and Machinery Hardware

Push Bars

Open doors with a push; often found on emergency exits

8 products