For over 30 years, HSI Fire & Safety has provided fire alarm test and maintenance professionals with a full line of equipment and accessories for functional testing of smoke, carbon monoxide and heat detectors.

In 1979, the original smoke detector test aerosol, SmokeCheck®, was created. Developed to answer a need for full functionality testing of a smoke detector, SmokeCheck received its first patent and UL listing.

Since then, HSI has led the development of additional functional testing mediums and tools for smoke and heat detectors. Our patented formulas give you confidence in your testing to know all your detectors are ready to respond.

Used by thousands of fire and safety professionals worldwide, our American made detector testing products meet compliance with US and global fire alarm codes and standards.

What Our Customers Say

Our inspectors stated that you don’t use as much spray to get a reaction, as with the other brands. Although they are less expensive, you can spray “forever” and it seems to take that long to get a response! Don’t waste your money trying to “save” money.

Y. Blanc

I was testing smoke detectors in a house prior to selling it. Around here, the local fire department has to provide a certificate saying the detectors work or there is no closing. This is what the Inspector showed-up with to test the system. They do it every day, so I was pleased to have gotten something for testing the detectors on my own that eliminated any last minute surprises.

R. L. Whalen

This is what the pros use for testing smoke detectors in commercial fire systems. It works great for both ionization (common household) smoke detectors and photoelectric (common commercial and home security system) detectors. Just a 1- or 2- second burst a few feet from the detector is all you need.

D. Boyle