Chlorophyll measuring instrument manufacturer

Chlorophyll measuring instrument manufacturer

1、 Purpose:

It is possible to measure the relative chlorophyll content (in SPAD units) or the degree of greenness, nitrogen content, leaf moisture, and leaf temperature of plants in real time, thereby understanding the true nitrate demand of plants and helping you understand the degree of soil nitrate deficiency or whether excessive nitrogen fertilizer has been applied. You can use this instrument to increase the utilization rate of nitrogen fertilizer and protect the environment (preventing excessive nitrogen fertilizer from contaminating the environment, especially water sources).

2、 Working principle

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 blades 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 screen.

2. Calibration and Calculation of Measurement Values

During the calibration process, the pressure head does not clamp the sample, and 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.

After clamping the sample with the pressure head, 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.

The values of steps 1 and 2 are used to calculate the SPAD measurement value, which represents the current relative chlorophyll content of the clamped sample leaves.

IIIChlorophyll measuring instrumenttechnical indicators

1. Fast and non-destructive detection of live plants without affecting their growth.

2. Multi parameter rapid one-time measurement: Simultaneously measure the chlorophyll, nitrogen, leaf temperature, and leaf surface humidity of plants in one operation, and display them in real-time.

3. Various parameters are displayed and stored simultaneously on the same screen.

4. The measurement data can be connected to a computer to export the measurement data, facilitating plant nutrient management and analysis.

5. Data saved in the host after an unexpected power outage will not be lost.

6. Historical data viewing, which can be viewed in sequence or by jumping. For historical data, it can be deleted one by one or all with one click.

7. Powered by lithium batteries with backlight function.

8. One click switching between Chinese and English.

9. Measurement range: Chlorophyll: 0.0-99.9SPAD Nitrogen content: 0.0-99.9mg/g

Leaf surface humidity: 0.0-99.9RH% Leaf surface temperature: -10-99.9 ℃

10. Measurement area: 2mm * 2mm

11. Measurement accuracy: Chlorophyll: within ± 1 SPAD unit (SPAD value ranges from 0-50 at room temperature)

Nitrogen content: ± 5%

Leaf surface humidity: ± 5%

Leaf surface temperature: ± 0.5 ℃

12. Repeatability: Chlorophyll: within ± 0.3 SPAD units (SPAD value between 0-50)

Nitrogen content: ± 0.5 units

Leaf surface humidity: ± 0.5 unit Leaf surface temperature: ± 0.2 ℃

13. Measurement time interval: less than 3 seconds

14. Data storage capacity: 32KB

15. Power supply: 4.2V rechargeable lithium battery

16. Battery capacity: 2000mAh

17. Weight: 200g

18. Working and storage environment: -10 ℃~50 ℃ ≤ 85% relative humidity

Chlorophyll measuring instrument manufacturer