The Edwards 500 and TS7 (700) series of conventional smoke detectors are 24Vdc photoelectric smoke detectors designed to be connected to UL compatible fire alarm panels, such as the Edwards E-FSC series.

Some of the features (depending on model number) include:
- Built in drift compensation.  Detector adjusts to the environment to reduce false alarms.
- CleanMe self diagnostics.  Detector will give a trouble indication if not calibrated properly or is dirty.
- Field replaceable smoke chamber for easy cleaning.
- Magnet test.  Alarm the detector with a magent, and even check sensitivity (no meters needed).
- Models available with heat sensor, relay base, and sounder base.