› M1 Support Forum › Issue with “water alarm” zone configured as “type 1” (NC) › Reply To: Issue with “water alarm” zone configured as “type 1” (NC)
April 13, 2026 at 11:09 am
#10193

For a Water Sensor you should be using a Normally Open sensor and install the 2.2KΩ across the contacts so you get the three states Normal secure, Alarm when the contacts short and “Trouble” in the event the loop opens (cut wire for example).
