Hi Chris
I have an Aquática housing with surveyor vacuum and moisture alarm. The valve is from Vivid Housings. The valve is independent from the surveyor alarm.
I am quite happy with the system.
I had an ikelite Housing on the past, and from that knowledge, the surveyor will work fine in it. The ikelite Housing has a lot of space to place the surveyor and it is fully clear that ales easy to see the blinking led.
You need to place the surveyor card (PCB) on the main body of the housing, with the moisture probe on the bottom of it (as it is the lower area in a normal position) to grant the soonest alarm in case of a flood. The PCB should be o the highest possible position to avoid that in an event of flood to drown it too quick and the alarm not signaling it. The location of the led should be in a place where it becomes well visible from outside.
Due to the moisture probe to be places the lower possible, the back door is not the best place to locate the PCB, although for the LED, most probably it would be the best location for visibility during the dive....
But it is a quite nice system! It allows you pre-dive check with the vacuum, and during the dive with the vacuum and the moisture alarm, signaling both with the color LED and also a buzzer!
BR
Pedro Alves