Plant water potential is one of the important water physiological parameters of plant cells and tissues. Its size affects the metabolism, growth and stress resistance of plants. It is an important indicator of plant physiological changes in modern agricultural research, and it is also a physiological mechanism to guide agricultural rational irrigation. index. The water potential of plants reflects the water status of plants in terms of energy. Therefore, the measurement of plant water potential has been receiving much attention. How is the plant water potential measured? The more common methods for measuring plant water potential are the small liquid flow method and the pressure chamber method. 1, small liquid flow method 2. Pressure chamber method Dot peen marking works by electromechanically striking a carbide or diamond stylus assembly against the surface of a part to be marked.For example,dog tag engraver.The result is a succession of dots to create digits, text, logos, and 2D data matrix codes. Each such dot is the result of a pulsed current that runs through a solenoid, punches a magnet toward the surface, and subsequently returns the stylus to its starting position, awaiting the next pulse. Because each pulse occurs in only a fraction of a second, an entire 2D data matrix code, for example, can be completed in seconds (depending on the size).
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The principle of the small liquid flow method is that water always flows from the high water potential to the ground. The plant tissue is placed in an external solution, and the water in the plant tissue communicates with the moisture in the external solution, thereby changing the concentration of the external solution. When a small liquid stream of a solution soaked in plant tissue is taken (sampling first for easy observation), when the middle part of the solution having the same concentration but not soaked in the plant tissue is placed, the small liquid flow will rise or fall due to the density. Sinking or not moving. By observing the rise and fall of the droplets, it is possible to judge the change in the concentration of the solution, thereby determining the water potential of the plant tissue.
The pressure chamber method is also called the pressure balance method. The principle is that the leaves of the plants continuously lose water to the surrounding environment through transpiration, resulting in transpiration. The method is to determine the water potential by measuring the negative pressure in the xylem tube. When the moisture is lost and the supply is in equilibrium, the water potential of the leaf cells is equal to the sum of the negative pressure of the liquid column in the catheter and the osmotic potential of the catheter juice. The absolute value of the osmotic potential of the juice is small, and it is generally considered that the negative pressure of the xylem conduit is substantially equal to the water potential of the foliage. The plant water potential pressure chamber is a professional instrument developed for the determination of plant water potential based on this method. The instrument inherits the high efficiency and convenience of the method, and the effect is remarkable in the actual measurement process. 
Notable Characteristics:
Cost effective
Requires no consumables
High speed accuracy
Will mark any material (including hardened steel)
