Usage monitoring of systems is often required to facilitate equipment warranty, to establish equipment reliability, for use in maintenance scheduling, or as hour meters in leased or power-by-the-hour products. 

Discrete electronic elapsed time indicators (ETIs) are the simplest, most effective and most reliable solution. Utilizing system independent EEPROM non-volatile memory, electronic ETIs guarantee data retention for 10 years un-powered and are built to be rugged and durable in demanding applications, typically in defence and aerospace.

Oxley produced the first fully electronic ETI over 20 years ago to replace less reliable, less accurate electrochemical and electromechanical technologies. Since that time our expertise has been recognized in defense programs such as the British Army Challenger II MBT, AS90 self-propelled Howitzer and the RAF Typhoon aircraft.