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Phase II PHT-3500 Portable Hardness Tester


The PHT-3500 can perform tests that easily convert to the most popular hardness scales, including Rockwell, Brinell, Vickers, Shore, etc.

Designed to test large hard parts:

Example: Tool steel should be close to 1” thick of solid material



  • Load the impact body
  • Place the impact body on your test piece
  • Push the button to begin testing and obtain reading

Standard Accessories:

  • Base instrument
  • Impact device D
  • Calibrated test block
  • Custom carry case
  • Cleaning brush
  • Operation manual

Optional accessories:

  • Impact devices; DC, D+15, DL, G, C
  • Special support rings
  • Mini Printer


  • Easy to use keypad operation
  • Auto identification of Impact Device
  • Large LCD display with back light
  • USB Ouput
  • Automatic conversions to: Brinell, Rockwell B & C, Vicker and Shore
  • Automatic mean value as well as Min & Max values
  • Battery Indicator
  • Memory capacity (100 groups)



  • Accuracy: +/- 0.5% (referred to L=800, 
  • Repeatability accuracy: +/- 4L units) L=Leeb
  • Measuring range: 200-960 HL
  • Materials: steel & cast steel, alloy tool steel, stainless steel, grey cast iron, spheroidal iron, cast aluminum, brass, bronze, wrought copper alloy.
  • Battery type: AA alkaline (4)
  • Operating temperature: 5-104 degrees F
  • Dimensions: 150 x 74 x 32mm
  • Weight: 245 grams


NIST/ASTM certified hardness test blocks are available.


Special Application Impact Devices

Impact Device D

Universal standard device: 

Use for the majority of hardness testing assignments

Impact Device DL (not shown)

Needle front section .109” diameter x 1.96” length

Measurements in extremely confined spaces

Impact Device G

Enlarged test tip: For use on solid heavy components such as; rough castings and forgings. Brinell only.

Impact Device DC

Extremely short impact device

Used for very confined spaces such as holes, cylinders, internal measurements

Impact Device D+15

Slim front section with coil set back.

Hardness measurements in grooves, recessed surface.

Impact Device C

Reduced impact energy


For testing case hardened or thin walled components 


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