Chlorophyll meter

NegotiableUpdate on 05/06

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The SPAD-502Plus chlorophyll meter is an instrument that can help users understand the nutritional status of crops by measuring the chlorophyll content in their leaves. The chlorophyll content is related to the growth conditions of crops, so it can be used to determine whether corresponding fertilizers need to be added. Only by optimizing the nutritional conditions can we grow more healthy crops and finally obtain high-quality Dafengshou (Salad of assorted fresh vegetables).

Product Details

Quick and easy measurement
When measuring, simply insert the leaves and close the measuring probe, without cutting off the leaves. This allows for monitoring of specific leaves throughout the growth process of the crop, resulting in more scientific analysis results.

Trend chart display
The trend of multiple sets of measured data will be displayed in the graph, and those data with significant differences can be easily identified and valued for analysis.

waterproof function
The SPAD-502Plus has waterproof function (IPX-4), allowing for outdoor measurement work even on rainy days.
Do not immerse the instrument in water or clean it directly with water.

Lightweight and easy to carry
The SPAD-502Plus has a compact body and weighs only 200g, making it easy to fit into a pocket and take to the field for measurement.

Low battery consumption
The SPAD-502Plus uses LED lighting sources, which greatly reduces battery consumption. A set of 2 AA batteries can perform approximately 20000 measurements.

principle
SPAD-502Plus evaluates the relative content of chlorophyll in the current leaf by measuring the absorption rate of the leaf in two wavelength ranges.

The following figure shows the spectral absorption of chlorophyll in two leaf samples. From the graph, it can be seen that chlorophyll reaches its peak absorption in the blue region (400500nm) and red region (600700nm), but does not absorb in the near-infrared region.

By utilizing the absorption properties of chlorophyll, SPAD-502Plus measures the absorption rate of leaves in the red and near-infrared regions. By analyzing the absorption rates of these two regions, a SPAD value can be calculated, which is a numerical representation of the current parameter corresponding to the chlorophyll content in the leaves.

Main specifications

model	Chlorophyll meterSPAD-502Plus
measurement object	Crop leaves
measurement method	Optical density difference at 2 wavelengths
measurement area	2 ×3 mm
sample thickness	1.2 mm in size
Sample insertion depth	12 mm (adjustable position to 0-6mm using depth adjustment device)
light source	2 LED light sources
sensor	1 SPD (silicon photodiode)
display	LCD screen display, 4 decimal places, trend chart
display range	-9.9-199.9 SPAD units
memory	30 sets of measurement data, capable of calculating/displaying the average value
power supply	Two No. 5 batteries
battery life	About 20000 times
Small measurement interval	About 2 seconds
precision	± 1.0 SPAD units (0.0-50.0 SPAD units, at room temperature and humidity) will display '*' when exceeding 50.0 SPAD units
repetitiveness	Within ± 0.3 SPAD units	0.0-50.0 ° C SPAD measurement position remains unchanged
reproducibility	Within ± 0.5 SPAD units
temperature drift	Within ± 0.04 SPAD units/° C
Operating temperature/humidity range	0-50 ° C, relative humidity within 85% (35 ° C), no condensation
Storage temperature/humidity range	-20-55 ° C, relative humidity within 85% (35 ° C), no condensation
Size	78 (width) x 164 (length) x 49 (height) mm, 200 g
other	Warning sound, user coefficient compensation
Standard Accessories	Deep braking, hand rope, 2 No. 5 batteries, soft pack, inspection certificate

SPAD Index: A KONICAMINOLTAChlorophyll meterThe display index and specifications related to chlorophyll concentration are subject to change without prior notice.