What Smartscan Hydra sprayheads are compatible with wireless alarms? Technical Support June 17, 2020 09:24 Updated Any heads from serial number SH11000867 are compatible. Related articles How does the water usage compare to ceiling mounted sprinkler systems? What is the specification of the wireless Hydra alarm? Which rooms do I need to cover when "protecting the means of escape" for building regulations? Does Automist suffer from false alarms? Does Automist Smartscan comply with the Building Regulations? Comments 0 comments Please sign in to leave a comment.