Sentry Sirens

Sterling Model M
Starting with the ones from the company's earlier years, the Model M is a rather compact double ended (and also available single ended) with the sound coming out the top through two "cuffs" above the air intakes. They're quite common as fire sirens, but aren't being produced anymore.
Sample video: https://www.youtube.com/watch?v=AK4f8lKKSBk

F2
Rather small, often seen in pairs as a result. Mostly resembles a spotlight
Sample video: https://www.youtube.com/watch?v=xB-SANdzKTI

2V8
Like a mix between an ACA Screamer and a Darley Weatherproof Champion
Sample video: https://www.youtube.com/watch?v=RLV0ykD_Euo

3V
Kind of halfway between a 2V8 and a 5VX.
Sample video:

5VX
The largest of the trio with very little info on them.
Sample video:

3V8
Generally resembles a hat and serves as the hornless version of the 3V8-H.
Sample video: https://www.youtube.com/watch?v=3SPCKZvQFhQ

3V8-H
As implied above, it's the horned version of the 3V8. It's pretty common to find in the wild.
Sample video: https://www.youtube.com/watch?v=ezv_sNhJiWI

5V
Largely just the 3V8 with a bigger rainshield.
Sample video: https://www.youtube.com/watch?v=4qPs3EbzX3g

10V
You can think of it like the 3V8-H, but with half the horns being longer. Pretty easy to find as well, probably easier than the 3V8-H due to the extended horns.
Sample video: https://www.youtube.com/watch?v=5ZhaXuDlJZ4

Defender
The company's only rotating siren since they became Sentry Siren. Didn't perform well as a whole so it's quite difficult to find. Pretty unique design though.
Sample video: https://www.youtube.com/watch?v=G4T4OJIhwtc

14V
A lot like the 3V8-H as well, but with fewer horns.
Sample video: https://www.youtube.com/watch?v=fJsHQbAigF0

15V2T
Generally taller than the others in the range with two sets of horns, kind of like 2 3V8-Hs on top of each other
Sample video: https://www.youtube.com/watch?v=v7AOwoIiU-0

16V1T
Very similar to the 15V2T, except with battery backup.
Sample video: https://www.youtube.com/watch?v=YNgPVFVA5FQ

40V2T
Basically 2 14Vs on top of each other
Sample video: https://www.youtube.com/watch?v=ieA6liR9z8M

SV-8
Totally unlike the other sirens in the range, more of a speaker siren.
Sample video: https://www.youtube.com/watch?v=QNk_-Xmz08o

Macro-Burst
Brand new, seemingly within the last few months or so, greatly resembles an ACA Super Banshee.
Sample video: https://www.youtube.com/watch?v=m5nGrah7qmk