Safety Tech International/STI Alarm Stopper II False Fire Alarm Preventer, Red

MFG Part #:

Safety Tech International/STI Alarm Stopper II False Fire Alarm Preventer, Red

STI's Stopper II consists of a clear, tamper-proof, supertough polycarbonate shield and frame that fits over manual pull stations. When lifted to gain access to the actual alarm, it sounds a piercing self-contained 95 dB or 105 dB warning horn (at 1 foot). Immediate attention is drawn to the area and a prankster will either run or be caught. Alarm cover measures 5-1/2"w x 7"h x 2-3/4"d. Power source is one 9 VDC battery. Tested and accepted by fire prevention authorities and UL.
General description: Protective cover to help stop malicious
and accidental false fire alarms
Brand: Safety Technology International (STI)
- Polycarbonate cover: Lifetime guarantee against breakage
in normal use
- Electronic components: One year
Material: Clear Polycarbonate, UV stabilized to help against
sun discoloration
Mount style: Flush mount
Inside height
At the front: 5.5"
At the back: 6.2"
Inside width
At the front: 3"
At the back: 5.5"
Depth: 3.2"
Horn volume at one (1) foot: Switchable 95 dB for office settings
or 105 dB for plant environments
Power source: One (1) 9 volt battery (included)
Testing - it has been tested and approved or listed by:
- UL/cUL Listed No. S2466
- For fire alarm applications, UL38 requires outdoor listed
stations for outdoor use
- Factory Mutual No. OG6A2.AY
- State of California (obtain local fire marshal approval)
- NEMA 3R Rated (only for Stopper II models with
backplate and gaskets)
- New York City Board of Standards No. 947-81-SA
- ADA Compliant (UL Certified No. S2466)
Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Related Products

Customers Also Viewed