Smoke Density (as Per ASTM)

Smoke Density Apparatus is used for measuring & observing the relative amount (Density) of smoke produced by the burning (combustion) or decomposition of Plastic, Cables etc. under controlled conditions.

Smoke Density Test Apparatus is used for measuring & observing the relative amount (Density) of smoke produced by the burning (combustion) or decomposition of Plastic, Cables etc. under controlled conditions.

In Smoke Density Test Apparatus, the sample is burned under controlled pressure of LPG, through a specified burner as per the standard. A light source and a photo receptor is placed on either side of the chamber, and the percentage of light absorbed is displayed through a linear amplifier digital electronic photometer with 0 to 100% absorbance scale. The Smoke Density Test apparatus comes complete with timer with 1.5-second pulse at every 15 sec, with hold facility, gas pressure gauge, damper and exhaust fan for removing smoke from the chamber.

The instrument is manufactured as per the ASTM D 2843, IS 13360 (Part 6/ Sec 9) etc.

The Smoke Density Test Apparatus instrument comprises of

     Single Walled glass door chamber made of 14 gauge Aluminum
     Burner, gas regular
     Electronic Photometric System
     Timer
     Specimen Holder
     Damper
     Exhaust fan

The Sample is burned using ASTM specified burner under control conditions. A Light source (6 V DC Bulb) emits light which is captured by Photocell which converts the light into Voltage. The intensity of light is proportional to the voltage produced. This voltage is picked up by sophisticated electronic detector, which display the same as % Absorption. As the smoke fills the chamber, the light intensity is reduced, reducing the voltage and the % absorption increase.

The operator records the absorption reading every 15 Sec in a 4 min test, and evaluates the sample on the criteria given in the standard.