Clark Instrument CRX-3 Digital Twin Hardness Tester (CR-3)


The CRX-3 Series are sleek and durable Rockwell Type hardness testers that were built for high volume testing with precise accuracy. Available in standard, superficial and twin models, the CR Series can accommodate many testing situations. Simple to use, you’ll come to depend on the CR Series when you require performance and efficiency in your shop, lab or factory.

Read More

Clark Instrument CRX-3 Digital Twin Hardness Tester Features:

Hardness conversion display for many scales
Upper and lower limits capability and OK/NG display
Plastic measurement mode comes standard
Steady load spindle mechanism for measuring spherical surfaces
Easy “zero setting with level meter and electronic sound
Automatic and manual start loading

One piece, heavy-duty cast housing enclosing all internal parts

Simple easy-to-use operation
Certified and ready to use



Clark Instrument CR-3 Digital Twin Hardness Tester Technical Specifications:

  • Minor Load: 10 kgf (98.07 N)
  • Test Load: 15-30-45-60-100-150 kgf
  • Minor Load Position Setting: Automatic setting (LED level meter and electronic sound monitoring.)
  • Load Control: Automatic (application-holding-release)
  • Dwell Time: 1-99 sec
  • Plastic Measurement: Standard function, time up to hardness value display after release
  • Hardness Conversion: Hardness conversion capable in compliance with SAE, ASTM, and JIS
  • Scale Display: C, D, A, G, B, F, K, E, H, P, M, L, R, S, V, 15N, 30N, 45N, 15T, 30T, 45T, 15W, 30W, 45W, 15X, 30X, 45X, 15Y, 30Y, 45Y
  • Maximum Specimen Height: 10 (254mm)
  • Maximum Specimen Depth: 6 (152mm)
  • Dimensions: 190 x 443 x 675mm
  • Accuracy conforms to ASTM-E-18
  • Weight: Aprx. 160 lbs
  • Power Supply: Single phase 115ACV / AC 100-240V 50/60HZ

Download the Clark Instrument CRX-3 Digital Twin Hardness Tester product information using the link below:


  help desk software