The TS3 Smoke Capsules are designed for use with the Testifire range of detector testers. Unlike the standard pressurised canisters / aerosols, the Testifire creates smoke stimuli on demand using non-toxic liquid based capsules which generate the smoke once a detector has been registered in the Testifire cup. This ensures detectors are not over exposed to test gas, prevents waste and ensures that you can test more detector heads with a single refill.