Portable chlorophyll meter

Purpose

The HM-YD portable chlorophyll meter uses two different light-emitting tubes to illuminate the leaves according to the chlorophyll spectrum absorption law. By measuring the intensity of light passing through the leaves, the relative chlorophyll content or green degree in the leaves is calculated, thereby providing a reliable scientific basis for reasonable, appropriate and timely fertilization. It is widely used in scientific research and production guidance in agriculture, forestry, plants, etc.

Features

Data measurement: extremely high measurement accuracy and repeatability (accuracy: ± 1.0 SPAD, repeatability: ±0.3 SPAD), comparable to imported brands, or can be calibrated by customers based on leaves or standard samples with known chlorophyll content

Data grouping: The instrument can automatically group data and automatically calculate the average value of each group of data. The data measured on the same leaf can be automatically divided into a group, which is convenient for viewing each measurement data and the average value of this group of data, effectively avoiding confusion of measurement data of different leaves. It uses 16GB large storage, so the number of groups and the data in each group are not limited

Data storage: 16GB large storage space, huge data storage capacity

Data browsing: The measured data, the average value of each group of data and the deletion of abnormal values can be browsed on the instrument at any time. The data is more intuitive

Data export: Multi-function USB interface, which can realize data export and charging functions. The instrument can be directly connected to the computer, and the data can be exported in EXCEL format. No host computer software is required, and the operation is simple and convenient

Display: High-contrast LCD display, which can clearly display data even under strong light

Measurement is fast and simple: When measuring, you only need to insert the leaves and close the measuring probe. There is no need to pick the leaves, which does not affect the normal growth of crops. You can monitor specific leaves throughout the growth process of crops, so as to obtain more scientific analysis results

Battery consumption: Low power mode design, built-in large-capacity lithium-ion rechargeable battery, energy-saving and environmentally friendly, and convenient for outdoor operation

Instrument charging: Excellent charging management design, can be adapted to most USB port (5V) chargers, with anti-overcharge function

Easy to carry: 250g weight, easy to carry to the field for live measurement

Technical indicators：

1. Measurement object: Land plant leaves

2. Measurement principle: Optical density difference at two wavelengths of 650nm and 940nm

3. Measurement range 0.0-99.9 SPAD

4. Measuring area 2mm*3mm

5. Measurement accuracy within ±1.0 SPAD unit (SPAD value between 0-50 at room temperature)

6. Repeatability within ±0.3 SPAD unit (SPAD value between 0-50, keep the measurement position unchanged)

7. Measurement time interval less than 2 seconds

8. Memory 16GB memory, can calculate/display average value, and delete outliers

9. Maximum sample thickness 1mm

10. Sample insertion depth 10mm

11. Power supply 4.2V rechargeable lithium battery

12. Battery capacity 2000mah

13. Weight 250g

14. Dimensions 140×85×45mm (length×width×height)

15. Operating temperature/humidity range: 0-50°C, relative humidity 85%

16. Storage temperature/humidity range: 20-55°C, relative humidity 85%

17. Standard configuration: host, charger, USB data cable, portable aluminum box, instruction manual, etc.

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