Plant water potential meter
Instrument Measurement Principle
In the continuous system of soil-plant-atmosphere, plant roots and stems continuously absorb water from the soil, while leaves continuously evaporate water into the surrounding environment. In this water potential gradient system, there is also a water potential gradient relationship between the plant's roots, stems, and leaves. This gradient causes the small water columns in the xylem vessels to be affected by the negative pressure of the low water potential of the air, creating an upward pull for water transport. When a plant branch or leaf is cut, the taut water column in the xylem breaks, and the water column contracts inward from the cut. The cut material is placed into the pressure chamber of the instrument (operating procedures are described in the next section), with one end of the cut protruding and sealed. Pressure is then applied to rebalance the tension within the branch or leaf, pushing the small water column back just to the cut surface. At this point, the water droplet detection probe automatically detects the seepage and automatically locks the measurement data. The pressure value displayed on the instrument is the current water potential of the plant.
Instrument Features
1. Equipped with a 4.3-inch color LCD touchscreen, supporting Chinese and English menu switching.
2. Supports both automatic and manual measurement modes, switchable with a single button. Sensor sensitivity is adjustable in automatic measurement mode.
3. Supports both MPa and Bar pressure units.
4. A continuous buzzer sounds when automatic measurement sampling is successful or data is recorded in manual mode.
5. Has a powerful storage capacity, capable of storing up to 9999 records.
6. Supports one-click deletion of all measurement data.
7. Data can be uploaded to a computer via USB cable. The software automatically connects to the device port and supports saving data in Excel format.
8. Includes a user manual for quick and easy operation.
9. Features a clock function and voltage display.
10. Button lights provide corresponding indicators during and after charging.
Technical Parameters
Detection Range: 0-4.99 MPa, 49.9 Bar
Display Method: LCD screen
Reading Accuracy: 0.01 MPa
Battery Life: 24 hours at 100% brightness and maximum power consumption
Pressure Tank Parameters: 4L, 12 MPa
Instrument Dimensions: Box 1 (Water Potential Meter Box Dimensions): 520mm × 330mm × 206mm
Box 2 (Water Potential Meter Pressure Tank Box Dimensions): 530mm × 420mm × 206mm
Net Weight: Approximately 12 kg per box