Real time asphalt pavement quality sensor using a differential a

Rebound-type hardness tester

Recording soil penetrometer

Reference-load variable hardness tester

Resiliency testing device for tennis balls

Rheological penetrometer

Rod insertion method and friction reducing device

Roll hardness observation testing apparatus and process

Roll-firmness measuring device

Safety drive hammer for a dynamic cone penetrometer

Sclerometer

Scratch testing device

Self-contained apparatus and method for determining the static a

Self-contained apparatus and method for determining the static a

Self-contained apparatus and method for determining the static a

Situ bore hole test probe

Skin compliance measurement device

Soil compaction measurement on moving platform

Soil investigation device

Soil or snow probe