Plant stem flow meter IN-JL01

Plant stem flow meter

Instrument Introduction

The plant stem flow measuring instrument uses the heat dissipation probe method to measure the instantaneous stem flow density of tree trunks, which can continuously observe the sap flow of trees for a long time. This is beneficial for studying the water exchange law between trees and the atmosphere, and using it as an observation method to monitor the impact of forest ecosystems on environmental changes for a long time. It has important theoretical guidance and practical value for afforestation, forest management, and forestry management.

Working principle

The plant stem flow measuring instrument adopts a new method for measuring Sap Flow invented by French scholar Granier after the 1980s, namely the heat dissipation probe method (constant heat flux sensor method). The data collection of this method has the characteristics of accuracy and stability, and can continuously read data without interruption, so the data is systematic. The measurement system consists of a pair of 33mm long heat dissipation probes. During installation, the probes are inserted into the edge wood of the tree with a distance of 10cm-15cm between them. The upper probe is wrapped with a resistance wire for direct current heating, while the lower probe is not heated and maintains the same temperature as the surrounding edge wood tissue. The temperature difference between the two probes reflects the liquid flow density of the tree.

Instrument characteristics

Dual probes, equipped with corresponding drilling tools, easy to insert and remove, can be reused repeatedly

Using the heat dissipation method, it can be heated at a constant temperature

Can be monitored continuously for a long time

Stainless steel probe, coated with Teflon, durable and long-lasting

Connect high-precision T-type thermocouples directly to the data analyzer

Using high-capacity SD card storage

TECHNICAL INDEX

Measurement indicator: instantaneous liquid flow density

Measurement channel: single channel

Storage capacity: 2GB

Sampling interval: 1-99 minutes adjustable

Display: 320 × 160 LCD screen

Power supply: 8.4V rechargeable lithium battery (solar cells can also be used for power supply)

Working temperature: 10 ℃ -60 ℃

Working humidity: 0-100% RH