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? Whats the maximum number of Automist Smartscan Hydra heads that can be connected to a single pump? How do you reset the Smartscan Hydra Controller? How is the commissioning using a wireless alarm different from using a detector on Hydra? Comments 0 comments Please sign in to leave a comment.