plant chlorophyll meter, leaf sensor
atLEAF+ chlorophyll meter description (discontinued)
This item is discontinued. Please see the Products page for the updated versions.

What is it?

is a powerful, handheld, easy to use device for noninvasively measuring the relative chlorophyll content of green leaf plants. Chlorophyll content can be an indicator of the plant’s condition.

How does it work?

Plant relative chlorophyll concentration is measured by inserting a leaf into the device aperture. Green leaves of up to 0.1 inch (3mm) thickness can be measured. It only takes one press of the key to perform a basic measurement.

By utilizing the atLEAF+ four keys you can:
  • assign species names to the measurements; until 500 names can be stored in atLEAF+
  • view up to 5,000 measurements stored in the device’s memory
  • delete the most recently performed measurement
  • delete all measurements
  • transfer plant names to the device or measurements to a computer using the USB mode

  • Specifications

    Measuring System

    Optical density difference at 2 wavelengths (660nm and 940nm)


    4 keys to operate all functions; simple, one-key operation to perform measurements only


    2 lines x 16 characters

    Data Memory Capacity

    5,000 measurements composed by value and associated species name;
    500 names up to 32 characters long (28 characters displayed)

    Power Source

    2 AA (1.5V) batteries

    Battery Life

    5,000-30,000 measures, depending on use and batteries type

    Time to perform a measure

    Less than 1 sec

    Dimensions (W x D x H)

    164 x 78 x 49mm (6 1/2 x 3 x 2")


    225g (8 oz)(not including batteries)


    USB with software for Windows

    Auto power off

    after 1 minute of inactivity (10 minutes in USB mode)

    Each atLEAF+ device is assembled, tested and calibrated in the United States.