OEFFICIENT OF FRICTION (SLIPPERINESS)
Instruments designed for determining Slipperiness (Coefficient of Friction)

PENDULUM SLIPPERINESS METERING (WESSEX)
Instrument for the determination of the frictional resistance. The Pendulum is based on the Izod principle: a pendulum consisting of a tubular arm rotates about a spindle attached to a vertical pillar. At the end of the tubular arm a head of constant mass is fitted with a rubber slider. The pendulum is released from a horizontal position so that it strikes the sample surface with a constant velocity. The distance travelled by the head after striking the sample is determined by the friction of the sample surface.

SLIPPERINESS METERING PLATFORM MODEL
To determine the dynamic critical angle in conformity with ISO 10545-17 annex C and DIN-51130 standards (R Value). The equipment consists of a painted steel framework with one zincplated platform with adjustable angle to accomodate the panel of 100x50cm ceramic floor tiles. Special shoes are impregnated with oil and the operative wearing a safety belt provided walks back and forth on the platform which is being inclined at the rate of 1° per second, until slipping occurs (the critical angle of slipperiness)

TORTUS 3
The Tortus 3 directly measures the dynamic co-efficient of friction as it traverses a surface or flooring material to be used by pedestrians. The measurements recorded are date/time stamped and can be downloaded as data files onto a USB memory stick. The unit can be mains or battery operated. The Tortus 3 has been developed from units originally designed by the British Ceramic Research Association (Ceram Research / Lucideon).

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