Rotational Penetrometer 100 Series
what is the RP?
The Rotational Penetrometer (RP), an Instrumented Surface Indentor, is a portable device for objectively testing the firmness and stability of ground and floor surfaces in the field.
Can’t take your trail to the surface testing lab? Rather than requiring a level sample surface to be tested in a separate laboratory environment, the RP brings surface testing to the field. The only device of its kind, the RP is a reliable, objective, portable instrument for testing all types of indoor and outdoor surfaces.
Constructed of stainless steel and aluminum, along with surface reference plates made of finished ApplePly plywood, the RP is designed for durability and long-term outdoor use. The fully-assembled device can even be transported without a carrying case, as is typical for HETAP trail assessments.
Research has shown that the Rotational Penetrometer produces repeatable results that correlate with the amount of work required to propel a wheelchair across a surface (as measured by ASTM F1951) and the amount of physiological energy required by persons with and without disabilities attempting to negotiate a surface. The RP provides objective and highly accurate firmness and stability readings without the performance of off-site ASTM F1951 testing.
Objective surface firmness measurements are obtained by pressing a caster into a surface with a given amount of force and measuring the amount of vertical penetration into the surface.
Objective surface stability measurements are also obtained by rotating the caster back and forth on the surface, measuring the total amount of vertical displacement after rotation.
objective surface measurements
The RP provides objective surface measurements which allow individuals to know the exact quality of a surface. Without objectivity, surface descriptions such as firm or soft are empty and meaningless.
The RP objective measurements have been shown to correlate with the amount of work required to propel a wheelchair (as measured by ASTM F1951) and the amount of physiological energy required by persons with and without disabilities attempting to negotiate a surface.
Objective surface measurements also provide builders, architects, and site planners with specifications to design and verify they are creating accessible indoor and outdoor surfaces.
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Rotational Penetrometer 100 Series kit
- Rotational Penetrometer
- User manual
- Instructional video
- Data recording forms
- Air pump with calibrated air gauge
- Temperature/humidity sensor
- Spare caliper battery
- Case for carrying and storing precision measurement components