R

Rate-of-Rise Heat Detector

A device that incorporates 2 thermistors, 1 internal and 1 external, to sense temperature. If the temperature increases quickly, the thermistors register different temperatures and the detector changes to the alarm state.

RDM (Radio Detector Monitoring)

A range of Apollo devices utilising radio linked technology compatible with XP95. Now obsolete.

Recommended Working Life

The recommeded working life of Apollo detectors is 10 years when used in dry, non-corrosive atmospheres and provided that they are regularly inspected, tested, cleaned and recalibrated correctly.

RemovAlert™

This is a patented feature of the Apollo AlarmSense range of detectors and means that the AlarmSense control panel is alerted if a detector is removed from its base without authorisation.

Repeater Panel

An indicating panel which mimics the displays and other features of a main control panel. The panel can either be active ie able to control all or part of the system, or passive ie to simply provide information.

Retro Mode

If it is difficult to fit the XP95 Beam Detector's transmitter and receiver on opposite walls, they can be placed adjacent to each other. One or more reflectors need to be fitted to the opposite wall to reflect the beam emitted from the transmitter to the receiver.