Gizmo Engineering has produced an easily installed timer box for tanks or batch processes. It is activated by a push button that counts down from a user-settable time. Loud warbling alarm and flashing LED alerts the user when the time has elapsed. Push the button again to end the cycle. The time is easily adjustable to an exact time using rotary switches with discrete positions (no fooling around with potentiometers that need trial-and-error setting).