Ph meter digital, refers to an instrument used to measure the pH value of a solution. The ph meter digital works on the principle of a galvanic battery. The electromotive force between the two electrodes of the galvanic battery is based on Nernst's law, which is not only related to the properties of the electrodes, but also to the concentration of hydrogen ions in the solution.
The larynx model shows the laryngeal cartilage, the connection of the larynx, the laryngeal muscle and the laryngeal cavity and other structures. The cricoarytenoid joint can move to simulate the function of opening or closing the glottis. The epiglottis can move up and down to cover the larynx. A total of 24 parts are indicated. logo.