Stress Wave Timers

Fakopp produces a range of stress wave timers for different applications.

prod - timer - f1d - thumb Fakopp Microsecond Timer is designed to measure stress wave propagation time in trees. The signal is generated by a hammer tap on the start sensor and the unit displays the measured propagation time. By measuring the distance between the two sensors, velocity can be calculated which can be used to detect hidden decayed parts or holes between the two sensors.
prod - timer - treesonic - thumb TreeSonic is designed to measure stress wave propagation time in trees in fibre direction. The signal is generated by a hammer tap on the start sensor. By measuring the distance between the two sensors, velocity in fibre direction can be calculated. Fibre direction velocity correlates well with elastic modulus and yield strength of wood. In this way wood material of the tree can be graded before cutting.
prod - timer - ut - thumb Fakopp Ultrasonic Timer measures ultrasound propagation time in wood. The signal is generated by an electrical impulse on the start sensor, therefore no hammer is necessary in this case. The frequency of the generated wave is in the range of 45 to 90 kHz, depending on the applied piezo sensor. Because the damping coefficient of wood at ultrasonic frequencies is high, this unit can only be used at short distaces. The applications are seedling test, glu-lam crack depth measuring, etc.

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