STI Indoor/Outdoor Surface w/ Horn Pneumatic SS2188EX-EN, Illuminated, Stopper Station with EMERGENCY EXIT, Green
Push once. Exit with confidence.
A surface-mount pneumatic push button with a raised EMERGENCY EXIT label, an illuminated bar and a protective horn cover. It gives people a clear, deliberate way to trigger an exit.

An exit button has to be seen and be hard to hit by accident.
A button that is hard to find or easy to bump causes trouble in both directions. The Stopper Station pairs a lit, labeled button with a protective cover with horn.
Built for deliberate activation
Pneumatic timing, a protective cover and a lit label work together in one surface-mount station.
Protective cover with horn
The cover helps protect the button from damage and accidental activation.

seconds maximum timer
The timer range is 2 - 60 seconds (± 15%) with repeat accuracy ± 10%.
Pneumatic adjustable timer
It opens or closes a circuit with a timed delay before reset, and needs no electricity to operate.
Illuminated bar
A multicolor 12-24VAC/VDC LED bar offers red, green and white LED color options.
NO and NC contacts
1 Form Z, 1 N.O. and 1 N.C. contact, with a switch rating of 10 amps resistive at 120-240 VAC.
Everything you need to know.
| Brand | STI |
| Model | Indoor/Outdoor |
| Product Line | Stopper Station |
| Product Type | Push Button |
| Mount Type | Surface Mount |
| Material | Polycarbonate, Stainless Steel |
| Contact Type | NO/NC (Combination) |
| Timer Range | 2 - 60 seconds (± 15%) |
| Switch Rating | 10 amps resistive at 120-240 VAC |
| LED Illumination | 12-24VAC/VDC |
| ADA Compliant | Yes |
| Certification | UL recognized component UL508 |
STI Indoor/Outdoor Surface w/ Horn Pneumatic SS2188EX-EN, Illuminated, Stopper Station ...
The STI SS2188EX-EN is a Indoor/Outdoor Surface w/ Horn Pneumatic (Illuminated, Stopper Station with EMERGENCY EXIT, Green). It is made for fire alarm, security and facility professionals who need dependable emergency push button equipment.
Key Features
- Pneumatic push button
- Raised EMERGENCY EXIT label
- Switch rating 10 amps resistive at 120-240 VAC and has a timer range: 2 - 60 seconds (± 15%) with repeat accuracy ± 10%
- Indoor use only. Not recommended for outdoor/water applications, temperature range of button 15° to 120°F (-9° to +49°C)
- Pneumatic adjustable timer opens or closes a circuit and has a timed delay before reset. No electricity to operate
- Multicolor illumination bar 12-24VAC/VDC LED (LED color options: red, green, and white)
- Ideal for security applications
- 1 Form Z, 1 N.O. and 1 N.C. contact
- Protective cover with horn helps protect button from damage and accidental activation
- ADA Compliant, UL recognized component UL508
Specifications
- Brand: STI
- Model: SS2188EX-EN
- Product Line: Stopper Station
- Product Model: SS2188EX-EN
- Product Series: SS2
- Product Type: Push Button
- Alarm Type: Audible
- Gang Type: Single Gang
- Material: Polycarbonate, Stainless Steel
- Maximum Timer Duration: 1 Minute
- Maximum Timer Duration (Second): 60
- Minimum Timer Duration: 2 Second
- Minimum Timer Duration (Second): 2
- Maximum Operating Temperature: 250°F (121.1°C)
- Maximum Operating Temperature (°F): 250
- Minimum Operating Temperature: -40°F (-40°C)
- Minimum Operating Temperature (°F): -40
- Application/Usage: Indoor/Outdoor
- Form Factor: Surface Mount
- Product Color: Green
- Input Voltage: 120V AC, 230V AC, 30V DC
- Input Voltage (V AC): 120, 230
- Input Voltage (V DC): 30
- Contact Type: N/C, N/O
- Print/Message: Emergency Exit, Lift Here, Push
- Limited Warranty: 1 Year
- Certifications & Standards: ADA UL/cUL Listed S7255 UL2017 UL294 CSA c22.2 No. 205
- Features: Illuminated Push Button, Surface Mount
- Shipping weight: 3 lb
Typical Uses
- Emergency, lockdown and exit signaling
- Schools, hospitals, offices and public buildings
Please confirm that the SS2188EX-EN matches your system, panel, mounting and finish requirements before ordering. Contact us with the model of your existing equipment if you need help checking compatibility.
Need help with compatibility?
Looking for a manufacturer part number, compatible replacement, or quantity order? Contact Raztechs for sourcing and quote support.

STI Indoor/Outdoor, ready to order.
- Product Line: Stopper Station
- Product Type: Push Button
- Mount Type: Surface Mount
- Material: Polycarbonate, Stainless Steel
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