The specific optical density of the resulting smoke is determined photometrically.
Samples are usually tested for 10 minutes, (or longer if the maximum optical density has yet to be reached.)
The NBS Smoke Chamber (or smoke box) data is usually presented graphically as cumulative optical density versus time curves.
Maximum corrected specific optical density values are quoted either as Dmc, or as Dmc/g in which the values are normalised for sample mass consumed during the test.
The NBS Smoke Chamber conforms to the following Standards:
Sample dimensions: 76mm x 76mm x up to 10mm thick.
ITRI Innovation’s NBS Smoke Chamber service is experienced at providing smoke density test results, with a fast turnaround, at very competitive rates.