Spad-502 Plus Laboratory Digital Portable Chlorophyll Meter

• Element: Digital Chlorophyll Meter
• Display: Digital
• Application: Lab or Agriculture
• Function: Storage
• Measurement Area: 2 mm×3 mm
• Subject Thickness: 1.2 mm Maximum
• Model NO.: SPAD-502 Plus
• Display Range: -9.9 to 199.9 Spad Units
• Light Source: 2 LED Elements
• Transport Package: Packing by Cartoon
• Trademark: Want
• Origin: China
• Production Capacity: 10000PCS/Month

Product Description

SPAD-502 PLUS chlorophyll Meter can measure relative content of chlorophyll, non-destructive to leaves. Measured datum will be displayed in trend graph. It can be used to enhance the utilization rate of nitrogen fertilizer.

Introduction:
1.Measures leaf chlorophyll, an important indicator of plant health.
The SPAD-502Plus performs quick measurements of the chlorophyll content of
leaves without damaging the leaf. Its lightweight, splashproof design make it ideal for
measurements in the field.
2.Non-destructive measurement of plant chlorophyll
The SPAD-502Plus enables quick, easy measurement of the chlorophyll content of
plant leaves without damaging the leaf. Chlorophyll content is one indicator of plant
health, and can be used to optimize the timing and quantity of applying additional
fertilizer to provide larger crop yields of higher quality with lower environmental load.
3.FeaturesProduct Overview
Quick, easy measurement of chlorophyll levels in plant leaves without damaging the leaf.
Measurements are taken by just closing the measuring head on the leaf. Since the leaf
is not cut off or damaged in any other way, the same leaf can be measured as the plant grows.

Trend graph display:

Up to 30 measurements can be stored in memory and displayed on a trend graph, so that changes in measurements over time can be seen and abnormal values can be noticed at a glance.

Water-resistant
The SPAD-502Plus is water-resistant (IPX-4) so it can be used outdoors even in the rain.
* It is not immersible, and should not be washed with water.

Compact and lightweight for portability
The SPAD-502Plus is small enough to fit in a pocket and weighs only 200g, so it can be taken anywhere.

Low power consumption
The SPAD-502Plus uses LED light sources, resulting in extremely low power consumption, with approximately 20,000 measurements from one set of fresh alkaline-manganese batteries.

Principal Applications
Monitoring of growth and health of plants
The SPAD-502Plus can be used to monitor the growth and health status of a wide variety of agricultural products, including wheat, rice, corn, cotton, etc.

Nitrogen fertilization optimization
The SPAD-502Plus can be used for determining when and how much nitrogen fertilizer should be provided to plants. Optimizing fertilization in this way leads to not only greater yields of higher quality, but also results in less over-fertilization,
reducing environmental contamination due to the leaching of excess fertilizer into the soil and underground water.

Specification

Measurement method	Optical density difference at two wavelengths
Measurement area	2 mm×3 mm
Subject thickness	1.2 mm maximum
Subject insertion depth	12 mm (with stopper having position adjustable from 0 to 6 mm)
Light source	2 LED elements
Receptor	1 SPD (silicon photodiode)
Display	LCD panel showing 4-digit measurement value (values shown to first decimal place)  and 2-digit number of measurements;Trend graph of values in memory can also be  shown.
Display range	-9.9 to 199.9 SPAD units
Memory function	Memory capacity for up to 30 values; Calculation/display of average of data in  memory also possible
Power source	2 AA-size alkaline batteries
Battery life	More than 20,000 measurements (when using new alkaline batteries under Konica  Minolta test conditions)
Minimum interval between  measurements	Approx. 2 seconds
Accuracy	Within ±1.0 SPAD units (for SPAD value between 0.0 and 50.0 under normal  temperature/humidity) "*" added to display when measurement exceeds 50.0 SPAD  units
Repeatability	Within ±0.3 SPAD units (SPAD value between 0.0 and 50.0 with no change in sample position)
Dimensions	78 (W) ×164 (H) ×49 (D) mm
Weight	200 g (excluding batteries)