SPAD 502 Nitrogen/Chlorophyll
The SPAD 502 Chlorophyll Meter instantly measures the amount of
chlorophyll content, a key indicator of plant health. Simply clamp
the meter over leafy tissue, and receive an indexed chlorophyll
content reading (0-99.9) in less than 2 seconds

SPAD 502 Plus Chlorophyll Meters quantifies the health
of your crops
The SPAD 502 Plus Chlorophyll Meter instantly measures
chlorophyll content or "greenness" of your plants to reduce the
risk of yield-limiting deficiencies or costly overfertilizing. The
SPAD 502 Plus quantifies subtle changes or trends in plant health
long before they're visible to the human eye. Non-invasive
measurement; simply clamp the meter over leafy tissue, and receive
an indexed chlorophyll content reading (0-99.9) in less than 2
seconds. Assess nitrogen needs by comparing in-field SPAD readings
to university guidelines or to adequately fertilized reference
strips. Research shows a strong correlation between SPAD
measurements and leaf N content.
New features in the SPAD 502 Plus include:
• Trend graphing stores and displays up to 30 measurements
• Waterproof design