Curious if anyone has additional thoughts on Notifier (or EST) vs Silent Knight:
features
backward/forward compatibility
quality
support
When I look at features - the NFS2-640 and SK 6820 seem very similar.
SLCs: 6820 can be expanded with more SLCs than the NFS2-640 (limited to 2)
multi-detection: NFS2-640 has “multi-detection” capability (not sure SK does).
cabinets: NS2-640 cabinets are significantly larger (8" wider, an inch or so deeper, and can be longer), and more modular.
NACs: 6820 has 4 NACs, but has two other “flexible circuits” that can be made NACs (though appears power output of panel maxes out at 6A). NFS2-640 has 4 NACs, but can be expanded with rack mount power supplies. Both can be expanded with external power supplies.
As for backward/forward compatibility, quality, and support, have no idea.