Most Common Sirens in New Jersey
This is an easy and concise guide to identify the four most common sirens in New Jersey. There are many more sirens than these however out in the field this is good to know.
01
The Federal Signal Model 2
The Federal Signal Model 2 is an omnidirectional 2-horsepower siren made by the company Federal Signal. The Model 2 has several variations however it has mostly stayed consistent throughout its production life. The easy identifiable factor of the Model 2 is its three shrouds. The middle shroud may be closer to the top or the bottom depending on when it was produced.
02
The Federal Signal STH-10
The Federal Signal STH-10 is second most common siren in New Jersey. It is a 10 horsepower single tone siren. It is easily identifiable because of its classic horns that span around the siren and the motor being on the upper side of the siren. The difference between the STH-10 and the STL-10 is the horns and the port ratio. To easily differentiate the two just look at the horns the STL-10 is more separated.
03
Federal Signal Model 5
The Federal Signal Model 5 though commonly referred as the Model 7 is the 3rd most common. It can use a 7 horsepower motor or a 10 horsepower motor depending on the specifics. This siren is easily identifiable because it has two shrouds, a cone shape and is much bigger than the Model 2. The Model 5 comes in many versions including a dual tone version. It is typically easy to see the stator so it can the ports can be counted.
04
Sterling Model M
The Sterling Model M commonly referred to as the Sterling Model M-10 is a siren that is typically used as a fire siren. It is easily recognizable by its dual rotor setup with a motor in the middle. They are typically horizontally mounted. Sterling's have an iconic look to them because of their appearance it is hard to describe in many cases however this picture should get the idea. There are also single-headed models the Sterling Model M. These have a similar design however they are just single-headed.
