Comparators | McMaster-Carr

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611 Products

Variance Indicators

Dial Plunger Variance Indicators with Magnetic-Base Holder

Economy Dial Plunger Variance Indicators with Jointed-Arm Magnetic-Base Holder

Position the arm by adjusting joints at the top, middle, and bottom

1 product

Economy Dial Plunger Variance Indicators with Rigid-Arm Magnetic-Base Holder

Twist the fine adjustment knob to precisely position the holder's arm

1 product

Mitutoyo Dial Plunger Variance Indicators with Magnetic-Base Holder

Stick the magnetic base onto flat and curved metal surfaces

1 product

Dial Plunger Variance Indicators with Magnetic-Base Holder

Stick the magnetic base onto flat metal surfaces while measuring

1 product

Economy Dial Plunger Variance Indicators with Magnetic-Base Holder for Uneven Surfaces Variance

Magnetic pins conform to any shape for mounting on uneven surfaces

1 product

Economy Dial Plunger Variance Indicators with Flexible-Arm Magnetic-Base Holder

Bend and flex the ball-and-socket arm of the base to position your indicator

1 product

Dial Plunger Variance Indicators

Economy Dial Plunger Variance Indicators

The dial moves clockwise as the plunger extends and retracts

16 products

Starrett Plus/Minus Dial Plunger Variance Indicators with Calibration Certificate

Determine variance from a baseline without doing any math

3 products

Mitutoyo Continuous Dial Plunger Variance Indicators

The dial moves clockwise as the plunger extends and retracts

14 products

Starrett Plus/Minus Dial Plunger Variance Indicators

Determine variance from a baseline without doing any math

2 products

Starrett Continuous Dial Plunger Variance Indicators with Calibration Certificate

The dial moves clockwise as the plunger extends and retracts

10 products

Mitutoyo Continuous Dial Plunger Variance Indicators with Calibration Certificate

The dial moves clockwise as the plunger extends and retracts

14 products

Mitutoyo Plus/Minus Dial Plunger Variance Indicators

Determine variance from a baseline without doing any math

5 products

Starrett Continuous Dial Plunger Variance Indicators

The dial moves clockwise as the plunger extends and retracts

10 products

Continuous Dial Plunger Variance Indicators with Calibration Certificate

The dial moves clockwise as the plunger extends and retracts

24 products

Combination Dial Plunger Variance Indicators with Calibration Certificate

Take direct and comparative measurements with the same indicator

7 products

Mitutoyo Plus/Minus Dial Plunger Variance Indicators with Calibration Certificate

Determine variance from a baseline without doing any math

4 products

Coolant-Resistant Economy Continuous Dial Plunger Variance Indicators

Rated IP65 for protection from dust, spraying water, and coolant

2 products

Starrett Continuous Dial Back Plunger Variance Indicators with Calibration Certificate

The contact point on the back lets you read the dial from above

10 products

Starrett Continuous Dial Back Plunger Variance Indicators

The contact point on the back lets you read the dial from above

10 products

Plus/Minus Dial Plunger Variance Indicators with Calibration Certificate

Determine variance from a baseline without doing any math

16 products

Economy Continuous Dial Back Plunger Variance Indicators with Calibration Certificate

The dial moves clockwise as the plunger extends and retracts

1 product

Starrett Continuous Dial Back Plunger Variance Indicator Sets

Include clamps, adapters and other accessories

11 products

Antimagnetic Starrett Continuous Dial Back Plunger Variance Indicator Sets

Use near magnetic chucks and other equipment with a magnetic field

11 products

Electronic Plunger Variance Indicators

Mitutoyo Electronic Plunger Variance Indicators

Read measurements on an LCD instead of a dial

21 products

Economy Electronic Plunger Variance Indicators with Rigid-Arm Magnetic-Base Holder

Stick the magnetic base onto metal surfaces while measuring

6 products

Easy-Read Mitutoyo Electronic Plunger Variance Indicators with Calibration Certificate

The larger LCD is easier to read than other Mitutoyo indicators

29 products

Coolant-Resistant Economy Electronic Plunger Variance Indicators

IP67 rated to seal out dust, coolant, and water from temporary submersion

11 products

Mitutoyo Electronic Plunger Variance Indicators with Calibration Certificate

Read measurements on an LCD instead of a dial

17 products

Economy Electronic Plunger Variance Indicators with Jointed-Arm Magnetic-Base Holder

Position the arm by adjusting joints at the top, middle, and bottom

5 products

Economy Electronic Plunger Variance Indicators

Read measurements on an LCD instead of a dial

3 products

Starrett Electronic Plunger Variance Indicators with Calibration Certificate

Read measurements on an LCD instead of a dial

8 products

Economy Electronic Plunger Variance Indicators with Flexible-Arm Magnetic-Base Holder

Bend and flex the ball-and-socket arm of the base to position your indicator

5 products

Economy Electronic Plunger Variance Indicators with Magnetic-Base Holder for Uneven Surfaces

Magnetic pins conform to any shape for mounting on uneven surfaces

5 products

Quick-Read Mitutoyo Electronic Plunger Variance Indicators

The LCD backlighting changes colors when measurements are out of tolerance

6 products

Compact Mitutoyo Electronic Plunger Variance Indicators with Calibration Certificate

The slim design fits in tight spots

9 products

Easy-Read Mitutoyo Electronic Plunger Variance Indicators

The larger LCD is easier to read than other Mitutoyo indicators

19 products

Remote-Reading Compact Electronic Plunger Variance Indicators

Read measurements from up to 4 ft. away

7 products

Starrett Electronic Plunger Variance Indicators

Read measurements on an LCD instead of a dial

6 products

Quick-Read Mitutoyo Electronic Plunger Variance Indicators with Calibration Certificate

LCD backlighting changes colors when measurements are out of tolerance

6 products

Electronic Plunger Variance Indicators with Calibration Certificate

Read measurements on an LCD instead of a dial

4 products

Water-Resistant Mitutoyo Electronic Plunger Variance Indicators

IP53 rated for limited protection from dust and spraying water

10 products

Economy Electronic Quick-Read Plunger Variance Indicators with Calibration Certificate

The LCD backlighting changes colors when measurements are out of tolerance

5 products

Compact Mitutoyo Electronic Plunger Variance Indicators

The slim design fits in tight spots

9 products

Economy Electronic Plunger Variance Indicators with Fractional Display

Display readings in fractional and decimal increments

2 products

Electronic Back Plunger Variance Indicators with Calibration Certificate

Read measurements on the LCD from above

4 products

Water-Resistant Mitutoyo Electronic Plunger Variance Indicators with Calibration Certificate

IP53 rated for limited protection from dust and spraying water

10 products

Dial Lever Variance Indicators

Mitutoyo Dial Lever Variance Indicators

The lever-style contact point pivots as it comes into contact with a surface

20 products

Starrett Dial Lever Variance Indicators

The lever-style contact point pivots as it comes into contact with a surface

6 products

Mitutoyo Dial Lever Variance Indicator Sets

Include additional contact points and mounting accessories

19 products

Economy Dial Lever Variance Indicators with Rigid-Arm Magnetic-Base Holder

Stick the magnetic base onto metal surfaces while measuring

1 product

Interapid Dial Lever Variance Indicators

Measure larger ranges than with our other lever-style indicators

21 products

Economy Dial Lever Variance Indicators

The lever-style contact point pivots as it comes into contact with a surface

4 products

Economy Dial Lever Variance Indicators with Jointed-Arm Magnetic-Base Holder

Position the arm by adjusting joints at the top, middle, and bottom

2 products

Starrett Dial Lever Variance Indicator Sets

Include attachments for indicator mounting

6 products

Starrett Last Word Dial Lever Variance Indicators

Half the dial face is yellow for easy measurement reading

6 products

Compact Dial Lever Variance Indicators

The slim design lets you measure in tight spots

2 products

Universal-Shank Starrett Last Word Dial Lever Variance Indicators

Mount these indicators to a lathe tool post or a height gauge

6 products

Starrett Last Word Dial Lever Variance Indicator Sets

Half the dial face is yellow for easy reading; include mounting attachments

6 products

Dial Plunger Variance Indicators with Precision Weighted-Base

Dial Plunger Variance Indicators with Precision Weighted-Base Holder

A flat granite base creates an accurate, stable reference plane

4 products

Dial Plunger Variance Indicators with Clamp-On Holder

Economy Dial Plunger Variance Indicators with Clamp-On Holder

Clamp these indicators onto a machine when space is tight

2 products

Economy Continuous Dial Back Plunger Variance Indicators with Clamp-On Holder

Clamp these indicators onto a machine and read the dial from above

1 product

Electronic Lever Variance Indicators

Read measurements on an LCD instead of a dial

3 products

Other Products

Surface Finish Gauges

Compare your surface to the swatches to see if you’ve achieved the desired finish

4 products

Height Gauges

Measure an object's height and mark workpieces for machining

5 products

Optical Comparators

Magnify your part to check for dimensional accuracy and surface defects

4 products

Color Calibrators

Calibrate your color meter to identify colors with precision

1 product

Machine Tool Indicators

Find the exact edge of a workpiece without math or guesswork to quickly align your machining setup

6 products

Squareness Gauges

Check frames and machined parts to see if they are leaning or uneven

3 products

Socket Adapters

Make your socket more versatile, from converting the drive to limiting torque

2 products

Torque Gauges

Test the accuracy of torque wrenches and screwdrivers

80 products

Torque Wrenches

Avoid overtightening and damaging fasteners by applying a specific torque

80 products

Torque Screwdrivers

Apply precise torque as you fasten screws to prevent overtightening

27 products

Torque Sensors

Convert manually applied torque into an electrical signal that you can measure and record

16 products

Bit Adapters

Connect a variety of bits to drills, powered screwdrivers, ratchet wrenches, and other turning tools

3 products

Torque Gauge Connectors

Replace square-drive connectors on torque gauges

3 products