The SPAD-502Plus is a portable chlorophyll meter that offers fast and non-destructive measurement of the chlorophyll content in the plant leaf. Its lightweight and water-resistant (IPX-4) design, combined with a small measuring area, makes it an ideal instrument for field measurements and analysis of various plants and agricultural applications like wheat, rice, corn, cotton, etc.

SPAD-502Plus Presentation (PPS:1.07MB)

Chlorophyll Meter SPAD-502Plus

The Konica Minolta Chlorophyll Meter SPAD-502Plus is an innovative and essential tool for assessing the health of crops and plants. The handheld SPAD-502Plus measures the chlorophyll content of leaves non-destructively and swiftly, providing immediate insights into a plant’s well-being.

The Chlorophyll Meter SPAD-502Plus calculates and provides the SPAD value, indicating the chlorophyll content present in the plant leaf. Operating the SPAD-502Plus is simple. By clamping the measuring head onto the leaf, the SPAD value is instantly generated without damaging or disrupting the growth of plants or crops in any way. Moreover, the SPAD-502Plus can also provide valuable insights into the plant’s nitrogen levels, facilitating the efficient use and management of nitrogen fertilizer. With a small measuring area of 2 x 3mm, the SPAD-502Plus can measure the leaves of various plants and crops, whether wheat, rice, corn, cotton, etc.

Spad 502Plus - Nondestructive measurement of chlorophyll

Chlorophyll Meter SPAD-502Plus

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.

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.

Chlorophyll Meter SPAD-502Plus

Measurement methodOptical density difference at two wavelengths
Measurement area2 mm×3 mm
Subject thickness1.2 mm maximum
Subject insertion depth12 mm (with stopper having position adjustable from 0 to 6 mm)
Light source2 LED elements
Receptor1 SPD (silicon photodiode)
DisplayLCD 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 functionMemory capacity for up to 30 values; Calculation/display of average of data in memory also possible
Power source2 AA-size alkaline batteries
Battery lifeMore than 20,000 measurements (when using new alkaline batteries under Konica Minolta test conditions)
Minimum interval between measurementsApprox. 2 seconds
AccuracyWithin ±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
RepeatabilityWithin ±0.3 SPAD units
(SPAD value between 0.0 and 50.0 with no change in sample position)
Dimensions78 (W) ×164 (H) ×49 (D) mm
Weight200 g (excluding batteries)

Chlorophyll Meter SPAD-502Plus

Catalog Download: Download PDF (2.0MB)

Owner’s Manual: Download PDF (1.0MB)

Chlorophyll Meter SPAD-502Plus

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