Smoke Detector Tester Aerosol - 250 mSmoke Detector Tester puts both photoelectric and ionization smoke detectors through their paces toensure that the circuitry, alarm and power is functioning and that they are actively sampling the air forany hint of a fire. Our patented formulation simulates the entire range of fire conditions giving you theconfidence of knowing your fire alarm system will respond promptly to all fire conditions. This product isapproved for testing smoke detector function per NFPA 72 par. 8-2.4.1 when used as directed.Our SmokeCheck™, Smoke Detector Tester does not have HFC or CFC. Our products do not damagethe Ozone layer and do not contribute to Global Warming. SmokeCheck™ is environmentally friendly.