HM-JL01 probe type plant stem flow measuring instrument
Introduction: The plant stem flow measuring instrument uses the thermal dissipation probe method to measure the instantaneous stem flow density of the trunk, and can continuously observe the liquid flow of the tree for a long time, which is beneficial to study the water exchange law between the tree and the atmosphere, and use this as an observation means to monitor the forest for a long time. The impact of ecosystems on environmental change. It has important theoretical guiding significance and application 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 the French scholar Granier after the 1980s, namely the heat dissipation probe method (constant heat flow sensor method). The data acquisition of the method has the characteristics of being accurate and stable, and the data can be read continuously without interruption, and thus the data is systematic. The measuring system consists of a pair of 33mm long heat dissipating probes. The probe is inserted into the sapwood of the tree 10cm-15cm apart from each other. The upper probe is wound around the resistance wire for DC heating, and the lower probe is not heated. Maintain the same temperature as the surrounding sapwood tissue, and the temperature difference between the two probes reflects the flow density of the tree. Features: 1. Double probe with corresponding drilling tools, easy to insert and remove, can be used repeatedly 2. Using heat dissipation method, it can be heated at a constant temperature 3. Can be continuously monitored for a long time 4. Stainless steel probe with Teflon coating for durability 5. Use high-precision T-type thermocouple to connect directly to the data analyzer 6. Use large capacity SD card storage Technical Parameters: Measurement index: instantaneous flow density Measurement channel: single channel Storage capacity: 2GB Sampling interval: 1-99 minutes adjustable Display: 320×160 LCD Power: 8.4V rechargeable lithium battery (can also be powered by solar battery) Working temperature: 10 ° C -60 ° C Working humidity: 0-100% RH
Introduction: The plant stem flow measuring instrument uses the thermal dissipation probe method to measure the instantaneous stem flow density of the trunk, and can continuously observe the liquid flow of the tree for a long time, which is beneficial to study the water exchange law between the tree and the atmosphere, and use this as an observation means to monitor the forest for a long time. The impact of ecosystems on environmental change. It has important theoretical guiding significance and application 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 the French scholar Granier after the 1980s, namely the heat dissipation probe method (constant heat flow sensor method). The data acquisition of the method has the characteristics of being accurate and stable, and the data can be read continuously without interruption, and thus the data is systematic. The measuring system consists of a pair of 33mm long heat dissipating probes. The probe is inserted into the sapwood of the tree 10cm-15cm apart from each other. The upper probe is wound around the resistance wire for DC heating, and the lower probe is not heated. Maintain the same temperature as the surrounding sapwood tissue, and the temperature difference between the two probes reflects the flow density of the tree.
