8400K Digital Optical Depth Measurement Micrometer

8400K Digital Optical Depth Measurement Micrometer

Fast, Reliable and Repeatable. Take the guesswork out of visual inspection.

Fast, Reliable & Repeatable

The 8400K Optical Depth Measuring Micrometer is a portable inspection microscope with depth measurement capability. It quickly and accurately measures the depth of scratches, fractures, cracks, crazing, corrosion pits, scribe lines, and other surface damage. It is easy to operate and requires no special training or expertise to use. The 8400K is durable, portable and can be easily calibrated in-house. The 8400K can be used on flat or curved surfaces, metals, plastics, composites, painted or chemically treated finishes, as well as transparencies and is capable of magnifications from 40X to 200X with depth measurements at an accuracy of +/- 0.001”.


Rugged & Portable
The 8400K was designed for use in the field. The sealed non-magnetic case is dustproof and shock resistant to withstand everyday shop use. The hardwood instrument case also contains adapters and lenses for use on convex, concave or any combination of these surfaces.

Real Cost Savings
With the 8400K, damage can be measured optically in a fraction of the time needed for other methods such as "blend-out." Spending time on a part that may need replacement is costly. In many cases the 8400K can be used to inspect installed parts on aircraft, piping, etc.

Serial Port for PC Access
In addition to the clear LCD readout "floating zero" and other features, the 8400K's digital display also has an RS232 serial port for data export to the optional processor/printer.

3 Interchangeable Bases

Use the 3 Leg Base on Flat Surfaces

Use the 4 Leg Base on Curved Surfaces

Use the Clear V Block Base for Small Diameters, Outside Angles and
Edges of Flat Surfaces

How the Optical Micrometer works

First, focus on a smooth surface next to a scratch. Then, zero out the digital display (you can choose a readout in either inches or millimeters). Next, focus on the bottom of the scratch. The digital display shows depth relative to the surface.

4400M Surface Replication Kit 

The 4400M Surface Replication Kit features the high resolution Microset replication compounds. Microset compounds are specially formulated two-part polymers, designed for high resolution replication of surface details. They are supplied in convenient and reliable cartridge application systems which allow replicas to be made, in any shape or size, of most solid non-porous surfaces. When used in conjunction with the 8400K Optical Micrometer Kit, Microset compounds provide a quick and convenient method of obtaining precise measurements of damage in hard to reach places. 

Common Applications:

  • Threaded Holes
  • Inside Diameters
  • Spline Inspection
  • Re-Entrant Geometries
  • Delicate Surface Finishes

Click on Link for more information on Microset Replication products - Microset 

8600C All-in-1 Kit

The new 8600C All-In-1 Kit is designed to support a wide range of applications at a cost-effective price. It includes the Optical Micrometer and powerful accessories in one portable and versatile surface inspection kit. Accessories include a lab stand with X-Y stage for easy and precise positioning in situations where the subject’s surface geometry prevents using the handheld Micrometer on a standard base, such as with brackets with complex shapes, and the Dino-Eye Eyepiece camera that can connect to a laptop or tablet for electronic inspection records with detailed annotations and high-resolution images.

Optional 8600R Microset Upgrade

Optional upgrade that includes a dispensing gun, replication compound, mixing nozzles, backing paper and a tilting stage base. Fits easily in the 8600C case storage pocket.

Optional 8600CK - Upgrade 8400K to 8600C Kit

Optional upgrade that includes a Lab Stand w/ X-Y Stage, AM7025X Dino-Eye Edge Eyepiece Camera and Offset Micrometer. All fitting nicely in the Foam Lined Rolling Carrying Case.

Technical Specifications

8400K Digital Optical Micrometer Kit Specifications

Accuracy +/- 0.001" (+/- 0.02mm)
Resolution 0.0005" (0.01mm)
Magnification 80X - 200X
Vertical Range 10X Objective - Max depth 0.250" (6.4mm)
4X Objective - Max depth 1.250" (32mm)
Operating Temperature 32°F to 140°F (0°C to 60°C)
Storage Temperature 14°F to 140°F (-10°C to 60°C)
Kit Dimensions 13" x 11" x 6" (330 x 279 x 152mm)
Kit Weight 6.5 lbs. (2.95 kg)
Calibration Recommended calibration cycle: 12 months

Kit Includes

8400K Digital Optical Micrometer Kit Includes

  • Digital Optical Micrometer
  • 3 Interchangeable Bases
  • 2 Eyepieces - 10X, 20X
  • 2 Objective Lenses - 4X, 10X
  • Scratch Sample Plate
  • LED Flashlight
  • Case w/ Foam Insert
  • 2 Year Warranty
  • Manufacturer's Certificate of Conformance
  • Certificate of Accuracy
4400M Microset Replication Kit Includes

  • One 50ml Dispensing Gun
  • Five 50ml Replication Compounds (choice of grade)
  • 50ml Nozzle Pack (Pack of 50)
  • Backing Slides (Pack of 50)
  • Backing Paper (Pack of 100)
  • Tilting Stage Base
  • Tall Tripod Optical Micrometer Base
  • ABS Carrying Case
8600C All-in-1 Kit and 8600R Upgrade Includes

8600C All-in-1:

  • Optical Depth Micrometer
  • Lab Stand w/ X-Y Stage
  • Dino-Eye Eyepiece Camera
  • 4-Leg Base
  • Offset Base
  • Acrylic V-Block Base
  • 10X Eyepiece
  • 10X Objective Lens
  • LED Flashlight
  • Scratch Sample Plate
  • Rolling ABS Carrying Case

8600R Microset Upgrade:

  • 50ml Dispensing Gun
  • 50ml Replication Compounds (Qty 2)
  • 10 pack 50ml Mixing Nozzles (Qty 2)
  • 100 pack Backing Paper
  • Tilting Stage Base
8600CK Upgrade 8400K Kit to 8600C Kit Includes

  • Lab Stand w/ X-Y Stage
  • AM7025X Dino-Eye Edge Eyepiece Camera
  • Offset Micrometer Base
  • Foam Lined Rolling Carrying Case

Optional Accessories

Stand & X-Y Stage

Ideal for inspecting small parts, complex geometries, concave surfaces, or delicate finishes. Opens the range of applications by providing an option when none of the bases are suitable or when there should be no contact between the Micrometer and the inspected surface. The Stand allows the Micrometer to be angled to inspect splines and corners and provides precise positioning of the subject within the field of view.


AM7025X Dino-Eye
5MP USB Microscope Eyepiece Camera

Records images to your PC or Tablet with software that launches quickly, is easy to use, has detailed annotation features, and stores files as standard formats for easy sharing. Conveniently small and portable with excellent image quality and 200X magnification, capturing every detail and recording exactly what would be seen by looking through the eyepiece.

Note: There is a $25.00 small order fee for orders valued less than $100.00
Can combine with other products to reach minimum.

Description Part # Saved Price Select Option Add to

8400K Optical Micrometer Kits & Accessories

8400K Optical Micrometer Kit Includes: Unit, 3 Interchangeable Bases, 3 or 4 leg & acrylic, 2 Eyepieces-10X, 20X, 2 Objective Lenses-4X, 10X, Scratch Sample Plate, LED Flashlight & Case GA-JCK-8400K $4,295.00
8600C All-in-1 Optical Micrometer Kit, Includes Unit, Lab Stand w/ X-Y Stage, Dino-Eye Eyepiece Camera, 3 Bases, 10X Eyepiece, 10X Objective Lens, LED Flashlight, Scratch Sample Plate and Case GA-JCK-8600C $6,300.00
8600CK All-In-One: 8600C Upgrade for the 8400K Includes: Lab Stand w/ X-Y Stage, AM7025X Dino-Eye Edge Eyepiece Camera, Offset Micrometer Base, Foam Lined Rolling Carrying Case GA-JCK-8600CK $3,300.00
AM7025X Dino-Eye Edge 5MP USB Eyepiece Camera GA-JCK-DINO-EYE $655.00
8400-71, Base, 3-Leg Soft Tip GA-JCK-8400-71 $150.00
8400-12, Base, 3-Leg Offset GA-JCK-8400-12 $165.00
8400-14, Eyepiece, 20X GA-JCK-8400-14 $94.00
8400-15, Eyepiece 10X GA-JCK-8400-15 $105.00
8400-23, Flashlight GA-JCK-8400-23 $50.00
8400-27, Tall Tripod Base, 4.5" GA-JCK-8400-27 $215.00
8400-35, Base, Corner GA-JCK-8400-35 $125.00
Lab Stand Kit, with X-Y Stage Included GA-JCK-5500L $2,400.00
Lab Stand Kit, with no X-Y Stage GA-JCK-5500K $1,400.00
X-Y Stage, for 5500 Lab Stand GA-JCK-5500-50 $1,500.00
Instrument Calibration (ISO17025) w/ Cert & Test Data GA-JCK-8400-0-Cal $250.00

Microset Replication Materials

4400M, Surface Replication Kit GA-JCK-4400M $1,400.00
8600R Microset Upgrade for 8600C All-in-1 GA-JCK-8600R $495.00
4400-1, Microset Dispensing Gun, 50ml GA-JCK-4400-10 $100.00
4400-2RTG, Microset Replication Compound (Thixotropic), 50ml, Grey GA-JCK-4400-2RTG $60.00
4400-2RFG, Microset Replication Compound (Fluid), 50ml, Grey GA-JCK-4400-2RFG $60.00
4400-3, Microset Nozzle Pack, 50ml, 10/Pack GA-JCK-4400-3 $24.00
4400-31, Microset Nozzle Pack, 50ml, 50/Pack GA-JCK-4400-31 $110.00
4400-4, Backing Slides, 60mmx40mm, 50/Pack GA-JCK-4400-4 $70.00
4400-5, Backing Paper, 70mmx60xxm 100/Pack GA-JCK-4400-5 $25.00
4400-6, Carrying Case, 4400M Surface Rep Kit GA-JCK-4400-6 $286.00
4400-7, Tilting Stage Base GA-JCK-4400-7 $208.00