2400 Series
24" Vertical Beam Optical Comparator

2400 Series


The "2400" Series 24" floor model vertical beam optical comparator sets a new standard for quality and price. It features a heavy-duty all-steel construction with ultra bright and an extremely sharp image with a built-in 3-lens turret with S-T's exclusive Gothic arch vertical bearings.


  • High precision 4" x 8" or 4" x 12" travel measuring stages with .00005"/.001 mm resolution precision glass scales. Quick release with fine adjust on x-axis.
  • Heavy-duty all-steel construction
  • Choice of QuadraChek® or Metlogix digital readouts.
  • Hardened steel bearing ways.
  • 3-position lens turret.
  • Curtain canopy and curtains.
  • Digital screen protractor to 1' or .01°.
  • Long life tungsten/halogen bulbs.
  • Duplex fiber optic surface illumination.
  • Available with motorized, joystick-controlled stages.
  • Available CNC option.

Optional Magnification Lenses

  • 5X Magnification
  • 10X Magnification
  • 20X Magnification
  • 25x Magnification
  • 31 1/4 x Magnification
  • 50x Magnification
  • 62 1/2 x Magnification
  • 100x Magnification



  • 2400-series-specs-smallWork Table: 10" x 14" (250 mm x 350 mm), 10" x 18" (250 mm x 450 mm), 12" x 14" (300 mm x 350 mm) or 12" x 18" (300 mm x 450 mm)
  • Measuring Range: 4" x 8" (100 mm x 200 mm), 4" x 12" (100 mm x 300 mm), 6" x 8" (150 mm x 200 mm) or 6" x 12" (150 mm x 300 mm)
  • Allowable Work Load: 25 lb (11 kg)
  • Illumination: Profile - 150 W, Surface - 150 W x 2
  • Digital Screen Protractor: 1 min/.01° arc
  • Focus Travel: 4" (100 mm)
  • Screen Size: 24" (600 mm) with 30-, 60- and 90-degree crosslines
  • Floor Space: 31" x 47" (785 mm x 1190 mm)
  • Electrical: 100/240 V, 50/60 Hz
  • Weight: 450 lb (200 kg) - Crated 830 lb (376 kg)

Quote Request

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Basic Comparator

Catalog #Description
20-2400-00 24" Vertical Comparator

Optional Digital Readout Measuring Stages

Catalog #Description
20-4648-21 4"X8" Stage with QC 121 DRO
20-4648-22 4"X8" Stage with QC 221 DRO
20-4648-23 4"X8" Stage with QC 221E DRO W/Edge Sensing
20-4648-25 4"X8" Stage with QC 5215 DRO W/Edge Sensing
20-4648-62 4"X8" Stage with M2 DRO
20-4648-63 4"X8" Stage with M2E DRO W/Edge Sensing
20-4649-21 4"X12" Stage with QC 121 DRO
20-4649-22 4"X12" Stage with QC 221 DRO
20-4649-23 4"X12" Stage with QC 221E DRO W/Edge Sensing
20-4649-25 4"X12" Stage with QC 5215 DRO W/Edge Sensing
20-4649-62 4"X12" Stage with M2 DRO
20-4649-63 4"X12" Stage with M2 DRO W/Edge Sensing

Motorized Stage Option

This Option Provides Motorized Movement of X and Y Axis. Included is a 2-Axis Joystick, Fine Position Jog Knobs, Stepper Motors and 2-Axis Driver. This Option is Available with Any of the DRO Options Above. This May be Upgraded in the Future to CNC Control.

Catalog #Description
20-4648-30 2-Axis Motor Drive Option, 4"X8" Travel Stage
20-4649-30 2-Axis Motor Drive Option, 4"X12" Travel Stage

CNC Comparator

CNC Motor Control Options include Joystick Control of Stage Motion and Fine Position Jog Knobs for Exact Positioning. Also includes Optical Edge Detection and CNC Motor Drive System for Automatic Measurement. M2E DRO provides easy to use, programming control and fixed reporting capability. Includes all feature types (point, line, circle, arc, distance, angle and skew), tolerancing and single feature graphic display. QC5215 DRO is a PC based readout system with CAD-Like User Interface and Unlimited Feature and Part Program Storage. Features complete graphical part display, as well as comprehensive reporting capability.

Catalog #Description
20-2480-01 CNC with 4"X8" Travel Stage and QC5215 DRO
20-2480-23 CNC with 4"X8" Travel Stage and M2E DRO
20-2481-01 CNC with 4"X12" Travel Stage and QC5215 DRO
20-2481-23 CNC with 4"X12" Travel Stage and M2E DRO

Magnification Lenses

Catalog #Description
20-1320-00* 5X Magnification Lens
20-1310-00 10X Magnification Lens
20-1313-00 20X Magnification Lens
20-1315-00 25X Magnification Lens
20-1316-00 31 1/4X Magnification Lens
20-1318-00 50X Magnification Lens
20-1319-00 62 1/2 Long Focal Length Lens
20-1321-00 100X Magnification Lens

*Must Be Ordered with 20-2400-00, Cannot Be Field Installed. Turret Lens Holder Not Available When Unit is Supplied with 5X lens. The Unit has a Single Lens Mount Only.

Options And Accessories

Catalog #Description
48-7271-00 Replacement Lamp, Profile Illumination
48-8086-00 Replacement Lamp, Surface Illumination
74-0432-2425 Replacement 24" Glass Screen
20-2416-00 Green Filter
20-3633-01 Matched V-Block with Centers for 8" Travel Stage
20-3633-03 Matched V-Block with Centers for 12" Travel Stage
20-4630-00 Replacement Glass for 4"X8" Stage
20-4630-01 Replacement Glass for 4"X12" Stage
20-8614-08 Right Angle Plate/Datum Bar for 4"x8" Stage
20-8614-12 Right Angle Plate/Datum Bar for 4"x12"
20-8614-20 Fixture Adapter Plate for 4"x8" Travel Stage
20-8614-21 Fixture Adapter Plate for 4"x12" Travel Stage
20-4650-00 Rotary Top Stage Plate, 2 Min Grad
20-4650-01 Rotary Top Stage Plate - Less Graduation
74-0321-10 10" Glass Magnification Scale, Certified
74-0330-20 20" Glass Magnification Scale, Certified
74-0413-00 Ball Checker, Certified
74-0500-00 Stage Calibration Master, Certified