PURPOSE: To concentrate a soln. rapidly and precisely by providing a temp. sensor at a liq. level where the sensor is exposed at a desired concn., detecting the finish of the concentration of the soln., and automatically stopping the heating for concentration.
CONSTITUTION: The detecting element 9a of the temp. sensor 9 made of a platinum resistor is inserted into the soln. 7 to a liq. level 7a where the desired concn. in obtained, and fixed to a stand 10. When the liq. level is lowered by the concentration on heating, the detecting element 9a of the temp. sensor 9 is exposed from the liq. level 7, and the detected value of the temp. sensor 9 begins to decrease and reaches the set temp. At this time, a relay is actuated, hence the power source of an electric heater 8 is turned off, and the concentration of the soln. is automatically finished.
KODA TSUTOMU
MORI HIROSHI
KUROISHI TOSHIBUMI
KUZUHARA ISAMU
| JP56080201B |