A Newton Gravity Sand Timer is a standard “hour glass” style sand timer enclosed in a sealed cylinder filled with liquid. When the Newton Gravity Sand Timer is flipped upside down, the seal air inside the glass timer forces it to rise to the top of the column. Although the rate which the timer floats to the top of the cylinder is not indicative of the time the sand takes to fall within it, it is still a unique and charming feature of this timer.
To use the timer, flip it upside down and observe the sand falling within the “hour glass” style timer. The floating aspect of the timer or the time it takes to float to the top of the column has no bearing on the time the sand takes to fall within the timer itself. Our timers are available in 3 timer lengths and with black sand.