The moisture oven determines the moisture content of paper, fiber board, or corrugated fiber board samples by weighing samples before and after drying them for 1.5-2 hours at 102±2°C in the oven. A sample is weighed initially, then dried in the oven which uses heaters, a fan for even heat distribution, and a PT-100 sensor connected to a PID controller to maintain the temperature. The dried sample is weighed again and the moisture content is calculated as a percentage based on the weight loss from drying.

1. Moisture Oven
Confirms to TAPPI
Moisture Determination System (Moisture Oven)
Purpose
To Evaluate the Moisture Content of paper, solid fiber board or corrugated fiber board in sheet form.
Principle
A suitable size of sample is cut and accurately weighed on digital balance to give the Initial wt. of
sample. The weighed samples are suspended on the racks in the oven maintained at 102±2°C.
Samples lose weight due to evaporation of water till these are bone dry.
Samples are dried for some predetermined time (which is established by previous experiments) say 1
1/2 - 2 hrs depending upon the wt. of the samples.
Loss in weight = final weight - initial weight.
% Moisture = (Loss in weight / Initial weight) x 100
Equipment :
Consists of an oven with S.S or Aluminum inner
chamber and suspension racks. A perforated tray at
bottom and an electric fan on the side gives even
distribution of heat.
Top and bottom heaters are suitably wired to give
final low working watts output of < 500 watts.
The heaters under these conditions will not glow red
(attain red heat). The oven temperature is sensed by
PT-100 sensor installed at the back side of chamber.
It feeds temp. signal to a microprocessor based PID
Temp. controller which is pre-set at 102 C.
The front panel of oven is of toughened glass with full view.
There is a timer knob of max. 60 minutes which should be used twice to test for 2 hours.
Other models with “Digital Timer” also available.
Note 1: The above equipment is to be used in conjunction with a High Accuracy Digital Balance
with least count of 0.01 g or better.
Note2 : Since we modify standard Ovens available in the market, the photo / design / colors of the oven
shown in the picture above may be different from the one that is actually supplied.