The experimental convective drier with an automatic weighing system and an electrically heated hot air system to supply hot air was used to dry the cauliflower samples. The centrifugal blower was capable to deliver 28.32 m3/min flow rate of hot air. The blower had a 19 cm diameter suction duct for the inlet of the air. To control the air velocity, this duct is provided with two (46.5 × 28 cm) sliding vents in the suction side of the blower. The air velocity was varied according to plan of work. Drying chamber for thin layer drying consisted of a plywood box, which was placed on the plenum chamber. The box was open from the top and the bottom side. On the bottom side, iron mesh was fixed to stream line the airflow. One 2.00 cm × 10.00 cm slit was cut on one side of the box to measure continuous weighing of sample being dried. The area of false floor was 0.08 m2. Cauliflower samples were dried in a pan. The 32 cm diameter 100 mesh pan suspended from the lever at the balance, placed on the wedge of the horizontal level arm. The hot air was force upward through the sieve and the sample. There was no control mechanism attached with the drying set-up to control relative humidity of the drying air and to re-circulate of drying air. The automatic weighing (Pardeshi et al. 1999) had a mechanical balance, linear variable differential transformer (LVDT), precision full wave rectifier, summing amplifier and a multi-meter to note down millivolt readings corresponding to the weight of drying sample at any time. The balance was able to determine up to 0.1 g. For measurement of sample weight, the automatic weighing system was calibrated for multi-meter readings and weight of the samples