The ODS2 has been designed to monitor critical areas for fuel oil leaks via remote optical sensors. 

The unit as standard includes an audible warning device, mute push button, flashing 8mm red alarm lamp and 8mm Control live green lamp.

Once an oil alarm has been raised, the ODS2 red "Alarm" lamp will start to flash and the audible warning device will start. The unit will remain in this condition even if the oil is removed from the sensor. Only muting the alarm will stop the sounder and de-latch the alarm. If oil has been removed from the sensor before pressing the "Mute Alarm" button the alarm lamp will extinguish indicating that no oil is present. However if oil is still being detected only the audible warning will stop leaving the lamp permanently on. Only when the oil has
been removed will the lamp extinguish.

All ODS units have a common alarm set of volt free contacts for onward signalling to Building Management Systems, telephone diallers or control systems.