Timers (elapsed time meters, hour meters) are used in applications where time itself is the main focus. These include simple knowlege of how long a machine has been running to determine machine maintenance. Examples include: filter change frequencies, elevator cable maintenance, and engine oil life indication. Timers generally have the ability to stop and then continue on from the point at which they stopped.
Electromechanical timers are perfect for applications requiring a readable display when no power is supplied. They are also resistant to tampering and harsh conditions, such as shock.
Electronic timers typically have a brighter display, and are more flexible. Many electronic timers have programmable time ranges and can be set to values other than 0 for replacement applications.
