PURPOSE: A method for simultaneously measuring of coal expansion pressure, gas pressure and furnace temperature in carbonizing coal is provided to obtain data with high reliability, by minimizing side effects of bothering other conditions. CONSTITUTION: A method comprises a first step of attaching a load cell(6) onto a movable wall(8); a second step of inserting a gas pressure detecting probe having a gas inlet hole and a gas pressure measuring unit into a coke oven; and a third step of inserting a thermocouple into the gas pressure detecting probe, in such a manner that the temperature measuring point is located at the gas inlet hole; and a fourth step of measuring coal expansion pressure, gas pressure and furnace temperature simultaneously in carbonizing coal in coke oven.
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