Automatic paper expansion meter No.2078

Dimensional changes when exposed to relative humidity fluctuations. The machine is able to provide various atmospheres of relative humidity where the specimen is subject to water content fluctuation, with a dial gauge showing expansion amount. Paper sheets, when affected by water, undergo dimensional changes. This factor is very important when using paper. Multi-color printing papers and map papers need to be highly stable in size even subject to water. This machine is designed to measure dimensional changes alongwith relative humidity fluctuation. There is a range of possibilities; the expansion of paper is detected and digitally displayed under various conditions, with various temperatures inside the system, atmospheres of various degrees of relative humidity, different water contents of specimen. In the case of the conventional measurement procedure, there is a dial gauge inside, so humidity sticks to the gauge shaft, causing precision problems. To solve this problem, the measurement section is positioned outside with a computer to automatically record temperature, humidity and expansion.