LED Indicators | McMaster-Carr

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Blue/Green/Magenta/Red/Turquoise/White/Yellow

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Straight Mitutoyo Connector

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DFARS Specialty Metals

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Digital Display Type

555 Products

Communication

Indicator Lights

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

164 products

Audible Alarms/Indicator Lights

Alert people with both light and sound

26 products

Traffic Lights

Signal and direct traffic

4 products

Barricade Lights

Mount to barricades so they're easier to see in low-light conditions

3 products

Vehicle Lights

Illuminate your way, mark your vehicle's clearance, or send signals to people and drivers

2 products

Aircraft Signal Lights

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

2 products

Display Screens

Display text, numbers, symbols, and other information from your electronics

19 products

Measuring and Inspecting

Electrical Resistance Meters

Prevent damage to electronics by checking that surfaces won't discharge static electricity

4 products

Electrical Panel Meters

See the amount of electricity used to run motors, generators, and other equipment

11 products

Electronic-Component Testers

Test, identify, and troubleshoot components such as circuit boards and diodes

3 products

Multimeters

Take current, voltage, resistance, and other electrical measurements

10 products

Tachometers

Measure the speed of rotating parts on machines such as shafts, gears, and belts

11 products

Stroboscopes

Shine a bright flashing light at moving belts and pulleys to measure speed and detect wear

6 products

Inspection Indicators

Mount to your equipment for a signal when it's time for maintenance or inspection

4 products

Load Cell Displays

Connect to load cells to view weight measurements

1 product

Torque Gauges

Test the accuracy of torque wrenches and screwdrivers

8 products

Force Gauges

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

7 products

Temperature and Humidity Meters

Simultaneously measure temperature and relative humidity

1 product

Thermometers

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

12 products

Light Meters

Measure light quality and intensity

6 products

Color Meters

Ensure consistent coloring on products such as labels and packaging

1 product

Bore Gauges

Insert into a hole and expand the contacts to measure diameter

3 products

Scales

Bench-top, hanging, floor, and conveyor scales

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

9 products

Compression Testers

Check engine compression to maintain top performance

1 product

Thickness Gauges

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

1 product

Gas Leak Detectors

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

2 products

Optical Comparators

Magnify your part to check for dimensional accuracy and surface defects

2 products

Lighting

Light Bulbs

Standard household, miniature, compact, tubular, ultraviolet, infrared, and blacklight bulbs

54 products

Light Pipes

Concentrate and direct light from the bulb on a circuit board to a display

16 products

Fluid Handling

Humidity Controllers

Monitor humidity and control it by automatically turning equipment on and off

1 product

Noncontact Temperature Sensors

Monitor the temperature of hazardous, sensitive, and hard-to-reach materials without touching them

11 products

Flow Switches

Turn equipment on or off when flow rate reaches a set point

6 products

Electrical

Multifunction Chemistry Controllers

Use pH or oxidation reduction potential (ORP) levels to turn equipment on or off

1 product

Building and Machinery Hardware

Cam Latches

Secure drawers, cabinets, mailboxes, and other enclosures

1 product

Safety Equipment

Fire Alarms

Alert people to fires with loud warnings

1 product