I-FIT (IL - Flexibility Index Tester)

About Troxler Products

Troxler Electronic Laboratories, Inc. is a world leader in the manufacturing of testing/quality control measurement equipment for the construction industry. We are recognized worldwide as the industry standard for Nuclear Moisture/Density Gauges. In addition to nuclear gauges, Troxler is also a leader in the production of Gyratory Compactors and Asphalt Ignition Ovens. Troxler continues to set new product standards of quality and precision in the construction industry. For a complete list of Troxler equipment, please review this Products section.

Mechanical Configuration

The Troxler I-FIT (Illinois - Flexibility Index Tester) machine is completely contained on a rolling portable test frame that is approximately 31.5" L x 20" D x 34" H. The fixture is designed to apply load to a Semi-Circular Beam (SCB) specimen through a pivoting head and roller bearing pins. The system is designed to meet the most current standard for TP105 Illinois.

Servo Hydraulic Actuator

The system includes a 4500lbf actuator with low friction seals. It utilizes closed loop feedback from the load cell and magneto restrictive position sensors for stroke and load line displacement (LLD).

Load Line Displacement Measurement

The LLD position sensor utilizes a non-contacting method to measures displacement of SCB specimen at the loading head.

Controls and Software

It includes a custom program for I-FIT test operation. Every test has a text data file created for easy to use post processing as well as printouts from the test during operation. In addition, a Multi-Test Language (MTL) compiler is provided to allow the user to create custom programs or modify custom programs and store as a callable application.


  • Accuracy - patented 2 CUDT system
  • Immediately prints and plots test summary
  • Includes ICT software for determining Flexibility Index (FI)
  • Three second runtime
  • Simple sample preparation
  • Most advanced hydraulics on the market


 Dimensions (L xW x H)  31.5 in x 20 in x 58.5 in
 Weight  350 lbs
 Actuator Speed  1800 in/min
 Force  4500 lbf
 Stroke  2 in or 50 mm
 Electrical Source  115 VAC / 20 Amp receptacle
 Data Output  Test Advisor software or ICT software output
Product Resources
I-FIT Product Brochure


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