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Accurate determination of chlorophyll concentration in absolute units [µmol m-2]

Patent-pending chlorophyll concentration meter returns chlorophyll concentration in absolute units of µmol of chlorophyll per square meter of plant leaf area.

Click here for full screen    About Dr. Bruce Bugbee

Click here for full screen    About Dr. Bruce Bugbee


Linear Output
The Apogee chlorophyll concentration meter is calibrated to measure chlorophyll concentration in leaves with units of µmol of chlorophyll per m2. This eliminates the problems with relative indexes of chlorophyll concentration. For reference and comparison purposes, the Apogee meter also outputs relative units [CCI or SPAD] if desired.
For details see: Parry, C., Blonquist Jr., J.M., & Bugbee, B. 2014. In situ measurement of leaf chlorophyll concentration: analysis of the optical/absolute relationship. Plant, Cell and Environment 37:2508-2502.

  Non-destructive Measurement
The meter measures the ratio of radiation transmittance from two wavelengths (red, strongly absorbed by chlorophyll, and near infrared, not absorbed by chlorophyll), making measurements non-destructive and nearly instantaneous (measurement time is less than 3 seconds). This facilitates rapid measurement of multiple leaves and monitoring of the same leaves over time.
Chlorophyll Concentration Meter MC-100
Storage Capacity and Geo-referencing
Memory allocated to data storage allows for 160,000 logged measurements. A mini USB port allows for direct connection to a computer to download data. An RS-232 port is available for external GPS connection, allowing field data to be geo-referenced. Storage capacity of geo-referenced data is 94,000 measurements.
  Variable Sampling Area
The meter measures the relative chlorophyll concentration over an area of approximately 64 mm2 (circle with 9 mm diameter). A field of view reducer is included to reduce the sampling area to approximately 20 mm2 (circle with 5 mm diameter) for leaves narrower than 9 mm.
Typical Application
Applications include chlorophyll concentration determination in plant leaves for assessment of nutrient status, fertilizer requirements, evaluation of stress, and optimization of harvest.
   
MC-100 CCI Units vs Chlorophyll ConcentrationMC-100 SPAD vs Chlorophyll Concentratrion Left: Older chlorophyll indexes such as CCI (left) and SPAD (right) do not have a linear relationship to chlorophyll concentration. Parry, C., Blonquist Jr., J.M., & Bugbee, B. 2014. Plant, Cell and Environment 37:2508-2502.

 

Additional Information
Instructions Using Your Apogee Instruments Chlorophyll Content Meter Owner’s Manuals Spec Sheet/ Product Brochure/ Owner's Manual
Applications Chlorophyll Content Meter Applications and Works Cited Technical information Apogee Instruments Chlorophyll Content Meter Technical Information

 

Models