Handheld leaf area meter

I. Product Overview

The YMJ series living-leaf area meters are newly developed, easy-to-use portable instruments for field work. They measure the leaf area and related parameters of leaves precisely, rapidly and without damage, and can also measure detached plant leaves and other flat objects. They are widely used in agriculture, meteorology and forestry.

The instrument measures leaf length, width and area directly. Depending on the model, it can integrate Beidou positioning and 4G wireless transmission and is fitted with a Type-C interface, so that measurement data and positioning information can be imported at the same time into a computer and a cloud data platform, which facilitates further processing of the data by researchers.

This model: No computer interface; data are stored and viewed on the host.

II. Model Comparison

III. Key Features

1) Integrated host and probe design for more convenient operation.

2) Microcomputer technology with a large LCD display.

3) High-performance large-capacity battery with no need for external power and a low-voltage indicator, giving long continuous measuring time and making the instrument more suitable for field measurement.

4) A large leaf area can be measured in a single operation (2000 × 155 mm²).

5) Storage capacity of 5000 data sets.

6) Multiple leaf parameters can be measured: leaf area, leaf length and leaf width.

7) Built-in calibration module, so that users can calibrate the instrument for different working environments.

8) Communication interface: Type-C, for importing data into a computer (YMJ-B and YMJ-G only).

9) Beidou positioning: an integrated Beidou satellite positioning module, so that all uploaded data carry time and latitude/longitude information for more effective data processing (YMJ-G only).

10) 4G wireless transmission: measurement data can be uploaded to the cloud platform in real time, where measuring time and leaf area can be viewed, curve charts can be generated for different parameters, data can be exported in Excel format and printed online, and data can be displayed for a selected time period, analysed as tables and line charts, and downloaded online (YMJ-G only).

IV. Technical Parameters