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Used test instruments in USA

  • Trusted Seller
    Lot of 25 Texas Instruments

    Lot of 25 Texas Instruments LM139JB Quad Differential Comparator NIB (YY0624-8)

    • Manufacturer: Texas Instruments

    Texas Instruments MPN: LM139JB NEW Lot of 25 Quad Differential Comparator New in Package 30 day warranty on all purchases. Your purchase will include what is pictured and described above ONLY.

    $39 USD
    Chattanooga, TN
  • Trusted Seller
    Auction
    Keyence IM-8030T Digital Microscope

    Keyence IM-8030T Digital Microscope

    • Manufacturer: Keyence
    • Model: IM-8030

    Keyence IM-8030T Digital Microscope, telecentric optical system, approx. 25x to 150x magnification range, 2 Megapixels camera resolution, LED illumination, USB, Ethernet, HDMI connectivity, AC 100-240V power supp...

    Blossburg, PA
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  • Trusted Seller
    Starrett 657AA Magnetic Base Indicator

    Starrett 657AA Magnetic Base Indicator Holder

    • Manufacturer: Starrett

    Used Starrett 657AA Magnetic Base Indicator Holder.

    $105 USD
    Millis, MA
  • Trusted Seller
    OSG TAP AND DIE 4310

    OSG TAP AND DIE 4310 OPTICAL COMPARATOR

    • Manufacturer: OSG TAP AND DIE

    OSG TAP AND DIE Model 4310 Optical Comparator, used condition. High-quality instrument for precise measurements. Ideal for any workshop requiring reliable optical inspection equipment.

    $300 USD
    Detroit, MI
  • Trusted Seller
    Starrett RS.020A1

    Starrett RS.020A1

    • Manufacturer: Starrett

    The STARRETT RS.020A1 Gage Block is a precision instrument designed for accurate measurements in industrial and scientific applications. This individual gage block has a dimension of 0.020 inches, making it suita...

    Cary, NC
  • Trusted Seller
    TECLOCK A1-51D

    TECLOCK A1-51D

    • Manufacturer: TECLOCK

    The TECLOCK A1-51D Dial Indicator is a precision measuring instrument known for its accuracy and reliability in various industrial and mechanical applications. With a measurement range of 0-1 inch, this dial indi...

    Cary, NC
  • Trusted Seller
    Starrett 81-228

    Starrett 81-228

    • Manufacturer: Starrett

    The STARRETT 81-228 Dial Indicator is a precision instrument designed for accurate measurements in industrial and mechanical applications. With a measuring range of 0-0.03 inches and 0.0005-inch graduations, this...

    Cary, NC
  • Trusted Seller
    Jones & Lamson FC-30, 5X

    Jones & Lamson FC-30, 5X LENS, QUADRA-CHEK 2000 DRO

    • Manufacturer: Jones & Lamson

    30" JONES & LAMSON MODEL: FC-30 OPTICAL COMPARATOR WITH QC 2000 DRO ****** 5X LENS ****** S/N: E-23094 SCREEN DIAMETER ................ 30" SIZE OF WORKTABLE .............. 6" X 30" TRAVEL OF WORK TABLE: LONGIT...

    Harrison, NJ
  • Trusted Seller
    Federal 130B-16 R5 Gage Block

    Federal 130B-16 R5 Gage Block Comparator

    • Manufacturer: Federal

    Federal 130B-16 R5 Gage Block Comparator This Federal 130B-16 R5 Gage Block Comparator is in great working condition. The manual adjustments function properly. The cable is clean and in good condition. The 130B-1...

    $9,995 USD

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    Est. $196/mo

    Converse, TX
  • Trusted Seller
    Nikon V-12B Optical Comparator/Profile Projector

    Nikon V-12B Optical Comparator/Profile Projector 12” Display with 50x, 100x lens

    • Manufacturer: Nikon
    • Model: V-12

    $4,000 USD
    Suwanee, GA
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    Ametek Talyvel 5

    • Manufacturer: AMETEK Powervar

    Universally accepted as the best in their field, Taylor Hobson’s Talyvel Electronic Level systems provide versatile and precise measurement for a wide variety of industrial, optical alignment (when used with Tayl...

    Farmingdale, NJ
  • Digital Shade Guide Tooth Color

    Digital Shade Guide Tooth Color Comparator Lab 110v

    • Manufacturer: CREXIDENT

    Dental Digital Shade Guide Tooth Color Comparator Sets Cordless for Dental Lab use The Digital Shade Guide is a machine provided shade guides of the VITAPAN classical A1-D4 shades (VITA16), VITA system 3D-master ...

    $550 USD
    Sacramento, CA
  • Schlumberger Tech 97911054 C/H Comparator

    Schlumberger Tech 97911054 C/H Comparator

    • Manufacturer: Schlumberger

    Unabel to fully test INCLUDES: Schlumberger Tech 97911054 C/H Comparator System was de-installed in working operational condition. All returns must comply with stated Return Policy. Please continue: PAYMENT OPTIO...

    $280 USD
    Santa Barbara, CA
  • Trusted Seller
    Keyence IM-7030T Image Dimension System

    Keyence IM-7030T Image Dimension System Measures Parts Repeatable

    • Manufacturer: Keyence
    • Model: IM-7030

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    $25,000 USD

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    Est. $471/mo

    Temecula, CA
  • Texas Instruments, Inc. SN74LS684N 8-Bit

    Texas Instruments, Inc. SN74LS684N 8-Bit Identity/Magnitude Comparators

    • Manufacturer: Texas Instruments

    Texas Instruments, Inc. SN74LS684N 8-Bit Identity/Magnitude Comparators Condition : New

    $10 USD
    San Jose, CA
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Overview

Comparators are precision instruments used to measure small deviations in dimensions by comparing the part being measured with a standard. They are essential in quality control processes in manufacturing, ensuring parts meet exact specifications. Common types include dial, digital, and optical comparators.

FAQ

What should I consider when buying a used comparator?

Check for accuracy, calibration records, and any signs of wear or damage. Ensure it meets your specific measurement needs and industry standards.

How do I ensure the comparator is shipped safely to my location?

Use specialized packaging to protect delicate components. Consider using a shipping service experienced in handling precision instruments.

What is the maintenance schedule for a comparator?

Regularly clean the instrument to prevent dust build-up, and verify calibration periodically. Follow the manufacturer’s guidelines for detailed maintenance procedures.