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Patented chlorophyll concentration meter returns chlorophyll concentration in absolute units of µmol of chlorophyll per square meter of plant leaf area.


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.


Storage Capacity and

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. Chlorophyll meter comes with a standard mini USB to USB cable for data download. 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.

Warranty and Support
The MC-100 is backed by a 1 year warranty and outstanding customer support.

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.


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  Technical Information
Technical Information
Find knowledge base articles, manuals, FAQs, technical support, and more.
+ How does the MC-100 work?
The MC-100 uses LEDs that emit specific wavelengths in the red and infrared ranges. The detector analyzes the ratio of the two wavelengths to determine chlorophyll concentration index. This index is then converted using equations derived by scientists at Utah State University to output chlorophyll concentration in µmol m-2 of leaf surface. Detailed information on how the MC-100 works can be found in the manual, by viewing Apogee Chlorophyll Meter Quick Overview, or by viewing MC-100 Chlorophyll Meter in Depth.
+ Is this a SPAD meter?
No, this is not a Minolta SPAD Meter; however, the MC-100 can be set to output SPAD units instead of concentration (µmol of chlorophyll per m-2 or chlorophyll content index (CCI) units.
+ What units does the meter measure in?
The default setting on the MC-100 takes leaf measurements in chlorophyll content index (CCI) units. The major benefit of the MC-100 is the ability to set output of the meter to display in chlorophyll concentration units (µmol m-2). There are concentration output settings for 22 specific plant species and a seperate conversion setting for use with any species that is derived from the average of all 22 species. For reference and comparision purposes, the Apogee meter can also be set to output relative units in CCI or SPAD.
+ What species does the MC-100 directly determine chlorophyll concentration in?
The MC-100 has equations for the following species: Rice, Wheat, Soybean, Barley, Pepper, Tomato, Pea, Kohlrabi, Lettuce (cultivar Waldman's Green), Lettuce (cultivar Buttercrunch), Corn, Sorghum, Quaking Aspen, European Birch, Paper Birch, Crimson King Maple, Norway Maple, Japanese Maple, Boxelder, Crab Apple, Purple Leaf Sand Cherry, Lilac, and Forsythia.
If your species is not listed above, the meter has a generic setting that uses an equation made to fit to all data (the equation is an average of equations for the 22 species). This setting can be found in the menu as "GENERIC".
+ My species isn't listed in the MC-100. Will the meter still work for me?
Yes the MC-100 has a generic setting with an equation made to fit to all data (the equation is an average for the 22 species listed in the MC-100). This setting can be found in the menu as "GENERIC".
+ What is the smallest leaf I can measure with this sensor?
The meter measures chlorophyll concentration over two areas.
  1. 64 mm2 (circle with 9 mm diameter)
  2. 20 mm2 (circle with 5 mm diameter)-with the Field of View reducer
+ What cable do I need to download data to my computer?
The MC-100 uses a standard mini USB to USB cable to download information onto the computer, one is included with purchase. The included cable is all that is needed to connect the meter to a computer. Once connected the meter comes up like a flash drive in a folder.

spec sheets
Specification Sheets




Chlorophyll Meter User Guide

Chlorophyll Meter Quick Overview

MC-100 Chlorophyll Meter in Depth

Lecture 7-Leaf Chlorophyll Concentration