Which tool is used specifically to perform a sensitivity test on detectors where required?

Which tool is used specifically to perform a sensitivity test on detectors where required?

• A. Test push button
• B. Calibrated sensitivity test instrument
• C. Smoke aerosol diffuser
• D. Listing certificate

Answer: (B)

Sensitivity testing checks how a detector responds to smoke at a specified level, using a controlled, known stimulus and a measurement that shows whether the detector meets the required performance range. A calibrated sensitivity test instrument is designed for this exact purpose, providing repeatable, traceable stimuli and a readout that confirms the detector’s sensitivity falls within the specified limits. The other options serve different functions: a test push button verifies basic operation and annunciation, not the detector’s calibrated sensitivity; a smoke aerosol diffuser challenges the detector with smoke but without producing a measured, standardized sensitivity value; and a listing certificate is documentation of approval, not a testing tool.

Sensitivity testing checks how a detector responds to smoke at a specified level, using a controlled, known stimulus and a measurement that shows whether the detector meets the required performance range. A calibrated sensitivity test instrument is designed for this exact purpose, providing repeatable, traceable stimuli and a readout that confirms the detector’s sensitivity falls within the specified limits. The other options serve different functions: a test push button verifies basic operation and annunciation, not the detector’s calibrated sensitivity; a smoke aerosol diffuser challenges the detector with smoke but without producing a measured, standardized sensitivity value; and a listing certificate is documentation of approval, not a testing tool.