HSI Fire HO-25S SmokeCheck NFPA 72 Compliant Smoke Detector Tester Aerosol Spray

Ensure your fire detection program performs when it matters most with the HSI Fire & Safety HO-25S SmokeCheck aerosol detector tester. Designed for technicians and facilities teams, this original SmokeCheck formula provides realistic, residue-free smoke simulation to validate smoke detectors, streamline testing, and support compliance with NFPA 72 and local fire codes. Each 2.5 oz can delivers approximately 300 tests, minimizing downtime and reducing per-test cost during routine preventive maintenance and monitoring tasks. UL/ULC listed and FM approved, the HO-25S is approved by most detector manufacturers and is safe on sensors—preserving detector sensitivity and extending equipment life. Its compact aerosol form works with both open and enclosed delivery versa-tools, making it ideal for use in security, surveillance, and building management programs that require dependable fire alarm testing. Add the HSI Fire HO-25S SmokeCheck to your test kit for efficient, code-compliant detector verification—order now to simplify maintenance and bolster your fire monitoring strategy.

• Delivers reliable, NFPA 72-compliant smoke simulation so fire and security teams can verify detector operation with confidence
• Ultra-concentrated 2.5 oz aerosol yields about 300 tests per can, reducing replacement frequency and lowering maintenance costs
• Safe on sensors and residue-free formula protects detector electronics and preserves warranty coverage
• UL/ULC listed and FM approved—compatible with virtually all smoke detector models for consistent testing across sites
• Compact, portable aerosol design pairs with open or enclosed delivery tools for fast, on-site fire alarm system validation