This 'Multi-Timer' has been a favourite laboratory timer for Physics.
It is microprocessor controlled for extreme accuracy and runs from 3 x 'AA' dry cells.

If buttons have not been pressed for 2 to 3 minutes, it turns off. When re-powered, all readings and memories are restored.
The 'Multi-Timer' runs only one external circuit, however 2 x Photo Gates can be used for starting and stopping the timer in different modes (see PDF file).

Auto ranging permits times up to 1.9999s with a resolution of 0.1ms, 19.999s by 1.0ms and 199.99s by 10ms. The 20 memories can be averaged, totalled, purged or cleared.

This rugged timer is very fast, is safe in the hands of students, is low cost and offers a good range of functions.

Genuine IEC product. See IEC website for Instruction Sheet.