The YG-97A mercury intrusion porosimeter mainly consists of four parts: vacuum system, sample chamber system, pressurization system, and measurement control system. The control panel is connected to the computer, and the vacuum pipeline containing mercury vapor and the sample chamber system are assembled in the workflow cabinet. The control panel and process cabinet are placed in mercury free and mercury containing operating rooms, separated from each other, with strict mercury safety protection measures, effectively avoiding the impact of mercury vapor on the indoor environment, and fully ensuring the health and safety of operators.

vacuum system

——Its main function is to remove air from the sample chamber, pipeline, and sample, creating a certain amount of negative pressure. This system mainly consists of a 2XZ-2 two-stage pump and a vacuum sensor, with a maximum vacuum degree of 0.05Pa;

Pressure system

——The pressure source is provided by a 100ml electric plunger pump, which provides 0-50Mpa (7250psi) pressure for the process, and can be infinitely adjusted to control the speed of the pump and the addition and removal of pressure.

Sample Room System

——It mainly consists of a sample chamber, a volume meter, a mercury bottle, various control valves, etc. It has the characteristics of high pressure resistance and vacuum resistance, small blank value, high measurement accuracy, and strong stability. The sample chamber has a volume of about 15cc and can hold block solid samples with a diameter of Ø 25mm and a length of 30mm (such as rock samples). The connection of the various components of the sample chamber system mainly adopts the principle of gravity difference, raising the position of the sample chamber to about 760mm higher than the volume meter and mercury bottle liquid level. By using this height difference, the pressure in the sample chamber is reduced by nearly 1 atmosphere below the mercury surface inside the volume meter and the mercury surface in the mercury bottle, thus achieving the goal of pressure measurement all under positive pressure, overcoming the inconvenience of pressure measurement under negative pressure (less than 1 atmosphere) by other manufacturers' instruments at home and abroad. By utilizing the principle of gravity difference, pressure measurement technology is carried out in a positive pressure environment, which is convenient, applicable, and ensures the continuity, stability, reliability, and integrity of the entire experiment.

Measurement control system

——It consists of three parts: pressure measurement, capacitance measurement, and vacuum measurement. The pressure measurement is completed by two pressure transmitters, 1Mpa (145psi) and 50Mpa (7250psi), and a digital pressure gauge. Capacitance measurement is achieved by using a capacitance transmitter and a digital display to display the changes in capacitance caused by changes in the liquid level inside the volume meter. Vacuum measurement is achieved by using the thermocouple principle of vacuum silicon to measure the vacuum degree inside the sample chamber.