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45 green sand timer
on 19 February 2014
Interesting that I'm apparently the first person to leave a review for this item.
Anyway, it arrived and the duration accuracy upon testing was fine; generally within a minute of the specified 45mins.
However, what was NOT fine that was that after just a few goes with it, I noticed that during one timing cycle the sand stopped falling half way through a the timing cycle! This is such a shame, because even if it does this say just one in ten cycles (and I haven't got the patience to find out what the actual failure rate is; it could be less or more frequent than that), I can't rely on it for timing lessons. It would thus be only suitable as a novelty item. I therefore regrettably sent it back for a refund. I have other sand timers that never jam during a timing cycle; I can only assume that it must be the quality of the sand; perhaps if the sand particles were smoother before being inserted into the glass body then they would be less inclined to jam up? I wonder if this review will get posted.