DEVICE FOR CONTROLLING CONCENTRATION OF NITRIC ACID Russian patent published in 2023 - IPC G01N9/26 

FIELD: chemical and metallurgical production.

SUBSTANCE: devices for measuring the concentration of nitric acid solutions in chemical and metallurgical production in the manufacture of fuel compositions. Invention can be used in particular in the technology of nuclear fuel production and radioactive waste processing. The device for monitoring the concentration of nitric acid contains two hydrostatic tubes connected to each other and fixed in a flange located at different levels in a solution of nitric acid, a temperature transducer fixed in the same flange, a differential pressure gauge with two measuring chambers, each of which is connected to one of the hydrostatic tubes, digital millivoltmeter, air preparation unit. In this case, the device additionally contains a temperature compensation unit, the temperature converter is placed in a sealed case, and a power supply unit is built into the digital millivoltmeter to supply electrical power to the differential pressure gauge.

EFFECT: increase of efficiency of the technological process, increase of the measurement accuracy and expansion of measurement range, as well as enabling the ability to display the results in units of concentration on the digital display of the millivoltmeter.

5 cl, 2 dwg