In. Gauges | McMaster-Carr

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66 Products

High-Accuracy Digital Contact Tachometers with Certificate of Calibration

Image of Product. Front orientation. Contains MultipleImages. Tachometers. High-Accuracy Digital Contact Tachometers with Certificate of Calibration.

Contact tachometers come in direct contact with the object measured and are an excellent choice for dirty and dusty environments.

±0.006% Accuracy—Accurate to within ±0.006% of reading, these tachometers come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

LCD Display—Choose tachometer with LCD for use in bright light.

LED Display—Choose tachometers with LED for use in dimly lit areas.

	Includes	Measurement Unit	Batteries Included		Each
0.1 rpm to 25,000 rpm Velocity Measured Range (±0.006% Accuracy)



	LCD	6" Speed Wheel, Measuring Tip for Flat-End Surfaces, 3 1/2" Extension Shaft, Carrying Case, Two Measuring Tips for Shafts with Center Hole	Centimeters, Feet, Feet per Hour, Feet per Minute, Inches, Inches per Minute, Meters, Meters per Hour, Meters per Minute, Miles per Hour, Revolutions per Hour, Revolutions per Minute, Total Revolutions, Yards, Yards per Hour, Yards per Minute	Yes	00000000	0000000


	LCD	12" Speed Wheel, Measuring Tip for Flat-End Surfaces, 3 1/2" Extension Shaft, Carrying Case, Two Measuring Tips for Shafts with Center Hole	Centimeters, Feet, Feet per Hour, Feet per Minute, Inches, Inches per Minute, Meters, Meters per Hour, Meters per Minute, Miles per Hour, Revolutions per Hour, Revolutions per Minute, Total Revolutions, Yards, Yards per Hour, Yards per Minute	Yes	00000000	000000
	LED	6" Speed Wheel, Measuring Tip for Flat-End Surfaces, 3 1/2" Extension Shaft, Carrying Case, Two Measuring Tips for Shafts with Center Hole	Centimeters, Feet, Feet per Hour, Feet per Minute, Inches, Inches per Minute, Meters, Meters per Hour, Meters per Minute, Miles per Hour, Revolutions per Hour, Revolutions per Minute, Total Revolutions, Yards, Yards per Hour, Yards per Minute	Yes	00000000	000000
	LED	12" Speed Wheel, Measuring Tip for Flat-End Surfaces, 3 1/2" Extension Shaft, Carrying Case, Two Measuring Tips for Shafts with Center Hole	Centimeters, Feet, Feet per Hour, Feet per Minute, Inches, Inches per Minute, Meters, Meters per Hour, Meters per Minute, Miles per Hour, Revolutions per Hour, Revolutions per Minute, Total Revolutions, Yards, Yards per Hour, Yards per Minute	Yes	00000000	000000

Accessories and Replacements for Tachometers

Note: Units are calibrated to work with either a 6" or 12" circumference speed wheel but not both.


Replacement AA Batteries	Pkg. of 4	00000
1/2" Dia. Measuring Tip for Flat-End Surfaces	Each	00000
1/2" Dia. Measuring Tip for Shafts with Center Hole	Each	0000
1 1/4" Dia. Measuring Tip for Shafts with Center Hole	Each	00000
3/4" Dia. Measuring Tip for Shafts with Center Hole	Each	00000
3/4" Dia. Measuring Tip for Flat-End Surfaces	Each	00000
6" Circumference Smooth Speed Wheel	Each	00000
12" Circumference Smooth Speed Wheel	Each	00000
6" Circumference Grooved Speed Wheel	Each	00000
12" Circumference Grooved Speed Wheel	Each	000000
Carrying Case	Each	00000
3 1/2" Extension Shaft	Each	00000

Laser Measurers

Point a laser to determine the distance to an object up to hundreds of feet away. These measurers show the distance on the LCD or viewfinder display.

LCD

Green Laser—Green lasers appear up to 10 times brighter than red lasers, so they’re easier to see outdoors, in bright lighting, and from far away.

Laser Targets—You’ll need a laser target (sold separately) to measure distances over 150 ft. or when shining the laser on an uneven, clear, or mirrored surface.

Measurers											Replacement Batteries			Cords		Laser Targets
Max. Distance Measured, ft.	Measurement Unit	No. of Values Stored	Lg. Accuracy Range	Measuring Functions	Laser Color	Batteries Included	Battery Rechargeable	Enclosure Rating		Each	Pkg. Qty.		Pkg.		Each		Each
100	Feet/Inches/Meters	2	-0.125" to 0.125"	—	Red	Yes	No	—	00000000	000000	4	00000000	00000	———	0	———	0
165	Feet/Inches/Millimeters	100	-0.0625" to 0.0625"	Add, Subtract, Calculate Square Feet, Calculate Cubic Feet, Bluetooth	Green	Yes	No	IP65	00000000	000000	—	———	0	0000000	000000	———	0
330	Feet/Inches/Meters	10	-0.06" to 0.06"	Add, Subtract, Calculate Square Feet, Calculate Cubic Feet, Bluetooth	Red	Yes	No	IP54	00000000	000000	4	00000000	0000	———	0	00000000	000000
500	Feet/Inches/Meters	20	-0.04" to 0.04"	Add, Subtract, Calculate Square Feet, Calculate Cubic Feet, Bluetooth	Red	Yes	No	IP65	00000000	000000	4	00000000	0000	———	0	00000000	00000

LCD with Backlight, Color Screen, and Touch Screen

Measurers with a color touch screen have a camera, so you can select your target on the screen. You can also magnify the image up to four times larger than its original size.

Cannot Be Sold To—Measurers that cannot be sold to the listed regions do not meet energy efficiency requirements.

Laser Targets—You’ll need a laser target (sold separately) to measure distances over 150 ft. or when shining the laser on an uneven, clear, or mirrored surface.

Measurers													Laser Targets
Max. Distance Measured, ft.	Measurement Unit	No. of Values Stored	Lg. Accuracy Range	Includes	Measuring Functions	Laser Color	Batteries Included	Battery Rechargeable	Enclosure Rating	Cannot Be Sold To		Each		Each
820	Feet/Inches/Meters/Millimeters/Yards	1,000	-0.039" to 0.039"	USB Cable	Add, Subtract, Calculate Square Feet, Calculate Cubic Feet, Bluetooth	Red	Yes	Yes	IP65	California	00000000	0000000	00000000	000000

Measuring Wheels


Style C	Style D	Style E	Style F

Style G	Style H	Style J

Roll these wheels along a surface to measure long distances. Choose a wheel diameter of 11.5” or larger for uneven surfaces. Wheels with a diameter less than 11.5” are good for smooth, hard surfaces.

Analog Display—Wheels with an analog display don't rely on a power source to count, so they won't lose power while you're measuring. However, you can't change the display to different units of measure.

Digital Display—Wheels with a digital display give you the option to show measurements in inch or metric units. Because they run on batteries, they can lose power while measuring.

Steel Wheel—Steel wheels are the most durable wheels in our offering, so they stand up to rough terrain. Their added weight gives them stability, so they’re good at staying accurate on uneven surfaces.

Aluminum Wheel—Aluminum wheels are lightweight yet durable and can be used on rough terrain.

Plastic Wheel—Plastic wheels are lightweight and work best on smooth, hard surfaces.

Handle Display—Wheels with a display on the handle give you easy access to the digital counter and its controls to let you change the settings while you measure.

Wheel Display—Those with a display on the wheel keep both the wheel and counter in your line of sight, so you can guide and stop the wheel for an accurate measurement.

Folding Handle—Wheels with a folding handle can be folded up for portability and storage in small spaces.

Telescoping Handle—Wheels with a telescoping handle let you change the length of the handle. When set to shorter lengths, you can use them on elevated surfaces such as countertops.

	Measuring Wheels														Batteries
						Tread
	Style	Wheel Dia.	Display Location	Max. Distance Measured, ft.	Measurement Unit	Pattern	Texture	Handle Type	Ht.	Folded Ht.	Measuring Functions	Batteries Included		Each	Pkg. Qty.		Pkg.
Analog Display







				Aluminum Wheel with Rubber Tread

				C	12"	Wheel	9,999	Feet/Inches	Solid	—	Telescoping	24" to 42 1/2"	—	Add Zero Reset	No	0000000	000000	—	———	0




						Plastic Wheel with Rubber Tread

						D	12 1/2"	Wheel	9,999	Feet/Inches	Solid	—	Telescoping	24" to 40"	—	Subtract Zero Reset	No	00000000	00000	—	———	0


						E	12"	Wheel	9,999	Feet/Inches	Solid	—	Folding	39"	20"	Subtract Zero Reset	No	00000000	000000	—	———	0
						F	4"	Wheel	9,999	Feet/Inches	Solid	—	Telescoping	18" to 36 1/2"	—	Add Zero Reset	No	0000000	00000	—	———	0
						G	4"	Wheel	9,999	Feet/Inches	Solid	—	Telescoping	18" to 36 1/2"	—	Add Zero Reset	No	0000000	00000	—	———	0


						Digital Display







										Steel Wheel with Rubber Tread

										H	15 1/2"	Wheel	99,999	Feet/Inches/Meters	Solid	—	Folding	43"	22"	Calculate Area Permanent Memory Zero Reset	No	0000000	000000	4	00000000	00000




												Plastic Wheel with Rubber Tread

												J	12"	Handle	99,999	Feet/Inches/Centimeters/Meters	—	Textured	Telescoping	24 1/4" to 38 3/16"	—	Data Hold Permanent Memory	Yes	00000000	000000	4	00000000	0000

Measuring Wheel Cases

		Each
Fabric Carrying Case for Styles A, B, C & D	000000	000000

Digital Flat-Material Measuring Wheels for Saws

Accurately cut 2×4s, boards, and other materials without the hassle of a tape measure or creating jigs as a stop. As you slide material along your saw fence, the digital counter measures its length, so you know what length you’re cutting. These measurers clamp onto most saw fences. Program the blade offset, including its angle, to account for the distance between the measurer and the blade, so you get an accurate measurement.

	Measuring Wheels														Batteries
				Max.					Overall
	No. of Wheels	Material Travel Direction	Accuracy	Lg. Measured, ft.	Speed, fpm	Clamping Clearance	Wheel Circumference	Tread Wd.	Lg.	Wd.	Ht.	Batteries Included		Each	Pkg. Qty.		Pkg.
Feet/Inches/Millimeters/Centimeters/Meters







				Plastic Wheel with Rubber Tread

				1	Side to Side	±0.029", ±0.75 mm	99	780	3/8"	6"	1/2"	6"	3"	4 1/2"	No	0000000	0000000	4	00000000	00000

Saw Fence Extensions

Saw fence extensions are required for saw fences shorter than 95 mm high. There must be at least two holes in the fence on each side of the saw blade to install these adapters.

Lg.	Ht.	Thk.		Each
23"	3 11/16"	1/4"	0000000	000000

High-Accuracy Contact/Noncontact Tachometers

Switch these tachometers from contact to noncontact mode by attaching the included adapter. They come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

±0.006% Accuracy—Accurate to within ±0.006% of reading.

LCD Display—Choose tachometer with LCD for use in bright light.

LED Display—Choose tachometers with LED for use in dimly lit areas.

1/4"-20 Female Threaded Bushing—All have a _1/4”-20 female threaded bushing for tripod mounting.

	Includes	Max. Measuring Distance, ft.	Measurement Unit	Batteries Included		Each
6 rpm to 99,999 rpm Velocity Measured Range (±0.006% Accuracy)



	LCD	6" Speed Wheel, 1/4"-20 Female Threaded Bushing, 7" Reflective Tape, Contact to Noncontact Mode Adapter, Measuring Tip for Flat-End Surfaces, Measuring Tip for Shafts with Center Hole	20	Feet, Feet per Minute, Inches, Inches per Minute, Meters, Meters per Minute, Revolutions per Minute, Yards, Yards per Minute	Yes	00000000	0000000


	LCD	12" Speed Wheel, 1/4"-20 Female Threaded Bushing, 7" Reflective Tape, Contact to Noncontact Mode Adapter, Measuring Tip for Flat-End Surfaces, Measuring Tip for Shafts with Center Hole	20	Feet, Feet per Minute, Inches, Inches per Minute, Meters, Meters per Minute, Revolutions per Minute, Yards, Yards per Minute	Yes	00000000	000000
	LED	6" Speed Wheel, 1/4"-20 Female Threaded Bushing, 7" Reflective Tape, Contact to Noncontact Mode Adapter, Measuring Tip for Flat-End Surfaces, Measuring Tip for Shafts with Center Hole	20	Feet, Feet per Minute, Inches, Inches per Minute, Meters, Meters per Minute, Revolutions per Minute, Yards, Yards per Minute	Yes	00000000	000000
	LED	12" Speed Wheel, 1/4"-20 Female Threaded Bushing, 7" Reflective Tape, Contact to Noncontact Mode Adapter, Measuring Tip for Flat-End Surfaces, Measuring Tip for Shafts with Center Hole	20	Feet, Feet per Minute, Inches, Inches per Minute, Meters, Meters per Minute, Revolutions per Minute, Yards, Yards per Minute	Yes	00000000	000000

Accessories and Replacements for Tachometers

Tips measure the rotational speed of shafts and other spinning objects.

Tips for flat-end surfaces are often used with pulleys and circular saws. They have a concave surface to fit flush over bumps, such as screw heads.

Tips for shafts with center hole are cone-shaped, so they’ll fit the inner diameter of different hole sizes.

Speed wheels measure the length and speed of conveyor belts, bolts of fabric, and material on spools. They have a grooved edge to fit over wire, cable, and cords.


Replacement AA Batteries	00000000	Pkg. of 4	00000
1/2" Dia. Measuring Tip for Flat-End Surfaces	00000000	Each	00000
1/2" Dia. Measuring Tip for Shafts with Center Hole	00000000	Each	0000
1 1/4" Dia. Measuring Tip for Shafts with Center Hole	00000000	Each	00000
3/4" Dia. Measuring Tip for Shafts with Center Hole	00000000	Each	00000
3/4" Dia. Measuring Tip for Flat-End Surfaces	00000000	Each	00000
6" Circumference Smooth Speed Wheel	00000000	Each	00000
12" Circumference Smooth Speed Wheel	00000000	Each	00000
6" Circumference Grooved Speed Wheel	00000000	Each	00000
Carrying Case	00000000	Each	00000
Reflective 1/2" Sq. Tape Tabs (Sheet of 35)	00000000	Each	0000
Reflective Tape Roll (5 ft. Lg. × 1/2 Wd.)	0000000	Each	00000
Replacement Contact Mode Adapter	00000000	Each	00000
3 1/2" Extension Shaft	00000000	Each	00000

Build-Your-Own Wire, Rope, and Cord Length Measurers

Combine a counter, feeder reel, coiler reel, and stand to create a wire, rope, and cord length measurer.

Counters


Counter for Cords and Rope	Counter for Wire, Cable, and Hose	Counter for Wire	Counter for Wire with Cutter

Counters measure material as you thread it through the internal wheels. These counters add and subtract. Mount them on a pedestal or floor stand (sold separately).

Polyurethane-Coated Steel Wheel—Polyurethane-coated wheels are for PTFE-coated wire and fiber-optic cable.

	Material OD		Each
Feet/Inches







	Steel Wheel

	Cords, Rope	9,999	—	1/4" to 3/4"	00000000	0000000


	Wire	9,999	—	1/64" to 7/8"	00000000	000000
	Wire	9,999	Cutter	1/64" to 7/8"	00000000	000000
	Wire, Cable, Hose	99,999	—	1/8" to 2"	00000000	00000000




			Polyurethane-Coated Steel Wheel

			Wire	9,999	—	1/64" to 7/8"	00000000	00000000


			Wire	9,999	Cutter	1/64" to 7/8"	00000000	00000000
			Wire, Cable, Hose	99,999	—	1/8" to 2"	00000000	00000000

Personnel Floor Scales

Measure a person’s weight.

Scales for Measuring Weight (Pounds and Kilograms) and Height (Inches and Feet)

Style C—Style C scales are our most rugged personnel scale. Originally designed for the healthcare industry, they can handle frequent use throughout the day. An antislip platform keeps your footing secure when you step on or off the scale. These scales also have wheels, so you can easily move them around your facility. Because they are digital, they are more precise and easier to read than dial scales. They operate on the included battery or AC adapter. Connect these scales to a computer with a DB9 RS-232 data cord (not included) to print and store measurements.

						Platform						Wheel
	Style	Wt. Cap.	Accuracy	Graduations	For Ht. Measurement	Wd.	Dp.	Material	Surface	Overall Ht.	Voltage, V AC	Material	No. of	Signal Type	Features		Each
Digital Display



		C	660 lb. (300 kg)	±0.2 lb. (±0.1 kg)	0.1 lb. (0.05 kg)	27" to 83"	10 3/4"	14 3/4"	Plastic	Textured	51 5/8"	240	Rubber	2	Data	BMI (body mass index) Tare Function	0000000	0000000

Legal-for-Trade Dimensional Scales

Quickly measure package dimensions to calculate shipping costs with these NTEP-approved scales. Simply place an item within the scan zone and they’ll give a readout in one-fifth of a second. They measure not only standard boxes and flat packages, but also irregularly shaped containers such as polybags. To transfer data to a printer or computer, connect an RS-232 cord (not included) via the DB9 port. These scales are compatible with UPS Worldship and other common shipping software. To calculate both weight and dimensions, use them with a weighing scale (sold separately).

	Max.				Overall									Electrical
	Lg. Measured	Ht. Measured	Wd. Measured	Lg. Accuracy Range	Ht.	Wd.	Dp.	Frame Material	Power, W	Voltage, V AC	Current, amp	Signal Type	Serial Port Interface	Connection	No. of Blades		Each
Inches, Millimeters, Centimeters



		40"	24"	24"	0.2" to 0.5"	51 1/2"	14 3/8"	25"	Steel	60	120 240	2.5	Data	RS-232	Straight Blade	3	0000000	000000000

Wire, Rope, and Cord Length Measurers


Bench Mount	Floor Mount

Feed wire through the wheels inside the included counter to take measurements. The counter adds and subtracts. Wind your wire around adjustable pins on the feeder reel, or place spooled wire on the _1/2" diameter spindle. Gather it on the coiler reel once it has passed through the counter. Coiler reels have a hand crank and collapse for storage.

Polyurethane-Coated Steel Wheel—Polyurethane-coated wheels are for PTFE-coated wire and fiber-optic cable.

						Feeder Reel			Coiler Reel
	For Use With	Mounting Location	Max. Lg. Measured, ft.	Includes	Material OD	Max. Coil OD	Coil ID	Wt. Cap., lb.	Coil ID	Coil Cap.	Wt. Cap., lb.	Pedestal Ht.	Floor Stand Ht.		Each
Feet/Inches







				Steel Wheel

				Wire	Bench	9,999	Counter, Feeder Reel, Coiler Reel, Floor Stand, Two Pedestals	1/64" to 7/8"	25"	6 1/2" to 18 1/2"	120	12"	270 ft. @ 1/2"	75	14"	—	00000000	000000000


				Wire	Floor	9,999	Counter, Feeder Reel, Coiler Reel, Floor Stand, Two Pedestals	1/64" to 7/8"	25"	6 1/2" to 18 1/2"	120	12"	270 ft. @ 1/2"	75	14"	24"	00000000	00000000




						Polyurethane-Coated Steel Wheel

						Wire	Bench	9,999	Counter, Feeder Reel, Coiler Reel, Floor Stand, Two Pedestals	1/64" to 7/8"	25"	6 1/2" to 18 1/2"	120	12"	270 ft. @ 1/2"	75	14"	—	00000000	00000000


						Wire	Floor	9,999	Counter, Feeder Reel, Coiler Reel, Floor Stand, Two Pedestals	1/64" to 7/8"	25"	6 1/2" to 18 1/2"	120	12"	270 ft. @ 1/2"	75	14"	24"	00000000	00000000

Flat-Material Measuring Wheels


1 Wheel	Backward	Forward

Measure sheets, rolls, and strips using these wheels and their attached counters.

Aluminum Wheel—Aluminum wheels are for high temperature processes and coarse materials such as sandpaper. The surface is knurled for good contact.

Plastic Wheel—Plastic wheels are for smooth materials such as paper and cloth.

	Measuring Wheels															Replacement Measuring Wheel Counters		Replacement Wheels
			Max.				Overall			Mounting Hole
	No. of Wheels	Material Travel Direction	Lg. Measured, ft.	Speed, fpm	Wheel Circumference	Tread Wd.	Lg.	Wd.	Ht.	No. of	Dia.	Ctr.-to-Ctr. Lg.	Measuring Functions		Each		Each		Each
Feet/Inches







				Aluminum Wheel

				1	Backward	999,999	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	0000000	0000000	0000000	0000000	0000000	0000000


				1	Forward	999,999	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	0000000	000000	0000000	000000	0000000	000000




						Plastic Wheel with Rubber Tread

						1	Backward	999,999	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	0000000	000000	0000000	000000	0000000	00000


						1	Forward	999,999	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	0000000	000000	0000000	000000	0000000	00000

Accessories and Replacements for Measuring Wheels