
STI Exit Stopper Multifunction Door Alarm – Red
Key Features
- Self-contained electronic emergency exit door alarm.
- Highly visible stop sign discourages unauthorised use.
- Ear-piercing alarm when door is opened.
- Key-operated override for authorised access.
- 32 user-programmable features.
- Low battery warning indicator.
- Durable polycarbonate housing.
Specifications
- Item Code: STI6400
- Finish: Red
- Power Source: 1 x 9V PP3 alkaline battery
- Diameter: 136 mm
- Depth: 50 mm
- Siren / Sounder: Yes
What's In The Box
- STI6400 Exit Stopper alarm.
- 9V battery.
- Override key.
- Mounting hardware.
Suitable Uses
- Emergency exit doors in commercial buildings.
- Retail theft deterrent at rear exits.
- Schools, hospitals and public facilities.
- Warehouses and industrial access points.
Dimensions

| Measurement | Size |
|---|---|
| Diameter | 136 mm |
| Depth | 50 mm |
PDF Resources
Frequently Asked Questions
- What happens when the door is opened?
The unit emits a loud alarm to alert staff and discourage unauthorised exit or entry. - Can authorised staff open the door?
Yes. The key-operated override allows approved users to silence the alarm. - How is the unit powered?
It uses a self-contained 9V battery for simple installation.
Additional Information
- Provides a simple and effective deterrent for unauthorised exit through emergency doors.
- Highly visible housing acts as a warning before activation.
- Can be mounted directly to most door types.
Technical Drawing
