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Slip-Test Mark IIIB: the only tribometer on the market that has achieved Certification to ASTM F2508!  Click here for a spec sheet!  Slip-Test interview on Corporate Review
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ASTM’s F13 Pedestrian Safety Committee and top biomechanical researchers worked 11 years in developing standard ASTM F2508. An F2508 Validation verifies whether a tribometer's readings can be reliably correlated to actual human slip events. Certification of a tribometer design to F2508 is an even more rigorous multi-step process, involving an Interlaboratory Study that documents the statistical precision of tribometer measurements.  See the Mark IIIB Certification Report here!

Slip-Test is the sole manufacturer of research - proven Mark IIIB & Mark IIB tribometers - totally re-engineered from the original designs of safety pioneer Dr. Robert Brungraber.


• CNC-machined billet aluminum structure, only 10 pounds (Mark IIIB)
• Test stair nosings in both directions of pedestrian travel
• Tests up, down, and cross-slope on steep ramps and slopes
• Easily test individual floor tiles as small as 8 inches square
• Stationary mechanical operation – no wheels, batteries, or CO2
• Parts are corrosion-resistant anodized aluminum, stainless steel, or plastic
• Pelican 1510 roller case (Mark IIIB) fits in airline overhead compartment

What's the difference between the Mark IIIB and Mark IIB?    

  • Tribometers are basically identical, except Mark IIIB testfoot actuation utilizes a compression spring, while Mark IIB testfoot actuation utilizes a 10 pound weight (which requires a larger Pelican 1610 case).  The Mark IIIB is preferable for most tribometry applications - call for details!
  • Tribometers comes with grooved Neolite testfoot, extra testfoot clip, height gauge & shims, printed instructions, instructional DVD, Pelican roller case, and individual Validation to ASTM 2508.
  • PRICE for Mark IIIB:  $6,200 plus shipping.  Price for Mark IIB:  $6,800 plus shipping.  Recommended yearly re-Validation for either is $300 plus shipping.
Mark IIIB Spec Sheet Mark IIB Spec Sheet

RENTALS - Slip-Test offers cost-effective rentals of the Mark IIIB tribometer, for customers that need a tribometer quickly for limited testing.

TRAININGThe Mark IIIB and Mark IIB are easy to use, but for those less familiar with the complexities of pedestrian traction analysis, Slip-Test offers an ASTM F2948 - based training course on both pedestrian walkway safety and the use of the tribometer.  Call Slip-Test for details!

TESTINGSlip-Test frequently conducts testing of walkway surface materials and coatings for manufacturers - contact Slip-Test for details! 

Trust the tribometer used by insurance companies, major theme parks, test labs, flooring manufacturers, and top forensic experts!