The custom 30 minute glass hourglass sand timers have been used through the centuries and still maintain a high symbolic value. The custom 30 minute glass hourglass sand timers are aesthetically pleasing ornaments, just enough accent and color to any setting, rather than accurate timepieces.
The custom 30 minute glass hourglass sand timer is a mechanical device used to measure the passage of time. It comprises two glass bulbs connected vertically by a narrow neck that allows a regulated trickle of material (historically sand) from the upper bulb to the lower one. Factors affecting the time interval measured include the sand quantity, the sand coarseness, the bulb size, and the neck width.
The custom 30 minute glass hourglass sand timers is useful for timing speakers and playing games. Making a punctual plan and place it near you and just do some reading, yoga and any other exercises, a clear ways to know plan is perfecly carried out.The custom 30 minute glass hourglass sand timer isalso very popular for corporate events and parties.
Hourglass sand timer may be reused indefinitely by inverting the bulbs once the upper bulb is empty.
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