1. Product Introduction
The plant chlorophyll meter can instantly measure the relative chlorophyll content (unit SPAD) or "greenness" of plants, which can understand the actual nitro demand of plants and help you understand the degree of soil nitro deficiency or whether nitrogen fertilizer has been applied excessively. You can use this instrument to increase the utilization rate of nitrogen fertilizer and protect the environment (preventing excessive application of nitrogen fertilizer from polluting the environment, especially water sources).
2. Working Principle
The working principle of a plant nutrient analyzer
1. Two LED light sources emit two types of light, one is red light (peak wavelength 650nm) and the other is infrared light (940nm). The two types of light penetrate the leaves and hit the receiver. The light signal is converted into an analog signal, which is amplified by an amplifier and converted into a digital signal by an analog/digital converter. The digital signal is processed by a microprocessor to calculate the SPAD value and displayed on the display screen.
2. Calibration and calculation of measurement values of plant nutrient analyzer
2.1. During the calibration process, the indenter does not clamp the sample, and the two LEDs emit light in sequence. The received light is converted into an electrical signal, and the ratio of light intensity is used to calculate.
2.2. After the sample is clamped by the indenter, the two LEDs emit light again, and the light transmitted through the blades hits the receiver, which is converted into an electrical signal. The intensity ratio of the transmitted light is calculated.
2.3. The values in steps 1 and 2 are used to calculate the SPAD measurement value, which represents the current relative chlorophyll content of the clamped sample leaves.
3. Technical Index
1. Can simultaneously detect four parameters: chlorophyll, nitrogen, leaf temperature, and leaf moisture
