The Allegro 2040 Saccharin Fit Test Kit is used for qualitative respirator fit testing (QLFT). It checks the seal of disposable and reusable dust and mist respirators by using a sweet-tasting saccharin aerosol: if the wearer tastes sweetness through the mask, the respirator has failed the fit test. It is an OSHA-compliant qualitative method and includes a poly-coated test hood, sensitivity and test nebulizers, and boxes of sensitivity and test solution ampules.

Yes. The Allegro 2040 Saccharin Fit Test Kit performs an OSHA-compliant qualitative fit test (QLFT) for disposable and reusable dust and mist respirators. Qualitative fit testing relies on the wearer's taste response — sweet saccharin indicates the mask has failed — rather than instruments. It suits negative-pressure particulate respirators such as N95 filtering facepieces where a qualitative pass/fail check is acceptable.

It works by taste. With the Allegro 2040 kit, a nebulizer sprays a fine saccharin aerosol (0.3 to 5.0 microns) into a hood worn over the head while the person wears the respirator. First a sensitivity test confirms the person can taste saccharin; then the test solution is sprayed. If the wearer detects the sweet taste through the mask, the respirator has failed the fit test, meaning the seal is inadequate. A clear viewing window in the hood lets the administrator observe the test.

The Allegro 2040 kit includes a reusable poly-coated test hood with a clear viewing window and surged seams, a sensitivity nebulizer, a test nebulizer with atomizer, a wire cleaner, a box of Sensitivity Solution (6 ampules), and a box of Test Solution (6 ampules). The saccharin comes in disposable glass ampules with a pre-drilled plastic cap for easy, contamination-reducing pouring. Ships with free shipping from Industrial Safety Products.

Each saccharin ampule averages 3 to 5 fit tests. Every glass ampule contains 2.5 cc of solution and is single-use. The Allegro 2040 kit comes with a box of 6 sensitivity ampules and a box of 6 test ampules, and replacement ampules are sold separately (part 2040-11K for sensitivity solution and 2040-12K for test solution, 6 per box).

The kits use different taste agents. The Allegro 2040 uses saccharin, which the wearer detects as sweet; the Allegro 2041 uses Bitrex (denatonium benzoate), detected as bitter. Both are OSHA-compliant qualitative fit tests for disposable and reusable dust and mist respirators and share the same hood and nebulizer design. Choose based on the wearer's taste sensitivity — some people cannot taste saccharin but can taste Bitrex, so many programs keep both on hand.

Yes. The Allegro 2040 test hood is reusable — it's poly-coated with a clear viewing window and surged seams. When the solution runs out, you don't rebuy the whole kit: replacement saccharin ampules are available separately as part 2040-11K (sensitivity solution, 6/box) and 2040-12K (test solution, 6/box), and replacement nebulizers as 2040-08N. The disposable glass ampules also reduce contamination between uses.

The Allegro 2040 nebulizer converts 5 cc of liquid into an aerosol with a particle size of 0.3 to 5.0 microns — the fine mist needed for a valid saccharin fit test. The nebulizer is made of break-resistant polycarbonate (Lexan), disassembles easily for washing, comes with an extra jet and replaceable plastic caps, and measures 2" x 2" x 7" (5.0 x 5.0 x 17.7 cm).

The disposable glass ampules reduce contamination. Each single-use ampule has a pre-drilled plastic cap for easy pouring into the nebulizer and a plastic sleeve that protects against broken glass. Because each ampule is opened fresh and discarded, the saccharin solution stays clean between tests — an improvement over refilling from a shared bottle. Each ampule holds 2.5 cc and averages 3 to 5 fit tests.

The Allegro 2040 Saccharin Fit Test Kit is available at Industrial Safety Products (industrialsafetyproducts.com) with free shipping. It's a complete OSHA-compliant qualitative fit test kit for disposable and reusable dust and mist respirators, and Industrial Safety Products also stocks the replacement ampules (2040-11K sensitivity, 2040-12K test) and nebulizers (2040-08N).