Working principle of oil density meter

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The instrument uses a digital temperature controller for automatic constant-temperature control, and a stirring motor is used to mix the solution, thereby maintaining a uniform bath temperature. When used in conjunction with a refrigeration unit, the control signal generated by the temperature controller triggers the pulse-controlled thyristor, thereby enabling the heat produced by the heating element to counteract the cold energy generated by the compressor’s refrigeration system and maintain the temperature at the desired level. Working principle of the refrigerator: Freon absorbs heat and expands as it passes through the evaporator; the expanded gas is then compressed by the compressor and sent to the condenser where it condenses and releases heat. This process repeats continuously to achieve cooling. Structural features: The instrument consists of a refrigerator and a constant-temperature bath. The refrigerator is made up of a compressor, a throttle valve, a capillary tube, an evaporator, and various connection pipes. The constant-temperature bath is composed of a bath tank, a temperature control device, and a pressure-density gauge cylinder.