Every physical Time Timer uses a quartz crystal to drive a mechanism which moves the colored disk as time elapses. This quartz mechanism is what is used in household clocks and is very accurate and the reason we chose this mechanism for Time Timers…Every Moment Counts!
The true duration of your timer can be seconds shorter or seconds longer from where the timer disk is originally set. The Time Timer accuracy guide is as follows:
- Time Timer PLUS 5 MIN and 20 MIN: +/- 15 seconds.
- All 60 minute Time Timers: +/- 30 seconds
- Time Timer PLUS 120 MIN (including the 120 Make Time edition): +/- 1 min
This level of accuracy is actually quite impressive! Many common mechanical timers can have variance up to 3 full minutes! In addition, many other timers require the user to set a timer for a minimum of a 10 minute duration before the timer can even begin.
Another factor for timing variance can be your Time Timer's battery life. If you're experiencing slow timing or no movement of the disk at all, you should replace your timer's battery.
If you've changed the battery and your Time Timer is still off by more than the accuracy guide suggests, please contact us to request a replacement.
For the curious:
Many time-of-day clocks also use a quartz crystal for time keeping, but because these clocks consistently count forward, they remain rather accurate.