SPAD 502 Plus Chlorophyll Meter

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 (-9.9 to 199.9) 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.

Instantly measures chlorophyll content or “greenness” of your plants on a scale of -9.9 to 199.9

Non-invasive, non-destructive measurement

Trend graph stores and displays up to 30 measurements

Waterproof design

Compare in-field SPAD readings to university guidelines

Research shows a strong correlation between SPAD measurements and leaf N content

Available with or without a built-in data logger

Includes hard carrying case and batteries

Data-logging model (2900PDL)

Connects to any GPS receiver that has a serial output option*

Equipped with internal data logger and RS-232 port

Records 4,096 measurements (1,488 with added GPS/DGPS option)

Configure and download meter with FieldScout® software and USB-to-3.5mm-Stereo-Plug Adapther (Item 3661U.(included)**

Compatible with SpecMaps™ online web-mapping application

*    GPS interface requires two cables.  The GPS/DGPS cable (item 2950CV5) is available from Spectrum. A PC serial interface cable supplied by the manufacturer of the GPS receiver is also required.

**   PC cable connects to a computer USB port.

Application Literature:

[1] Hu Hao, Bai Youlu, et al. Study on nitrogen nutrition diagnosis of winter wheat based on SPAD-502 and GreenSeeker [J]. Chinese Journal of Ecological Agriculture, 2010, 18(4):748-752.

[2] Zhang Guolong, Chen Jian, et al. Using GreenSeeker and SPAD to monitor the occurrence of cotton aphid [J]. Northwest Agricultural Journal, 2014,23(5):171-176.