Sap Flow Tool is able to import and visualise data from various sensors and measurement devices, not just sap flow meters.
Sap Flow Tool can perform sap flow calculations on data from sensors based on two measurement principles:
HRM (Heat Ratio Method) sensors
HFD (Heat Field Deformation) sensors
1. Visually manipulate your data (remove bad data, smooth, calculate daily averages, etc)
2. 2D and 3D visualisation of sap velocities, sap flux densities and sap flow rates
3. Interactive radial sap flux density and sap velocity profile
4. Analyse and visualise data from multiple sensors and/or multiple files
5. Import and visualise non-ICT International sensor data
6. Windows and Mac version
Multiple data files containing multiple sensors can be loaded and managed simultaneously.
Sap Flow Tool also supports importing non-sap flow data, including non-ICT International sensor data. However, sap flow calculations are limited to ICT International sap flow sensor data.
Use the quick view graph to quickly inspect any imported data column.
In order to calculate sap flow rates from HFD sensor data, K-values need to be obtained for each thermistor position.
Sap Flow Tool calculates K-values using an intelligent adaptive regression algorithm that will automatically determine the optimal portion of the data needed for the regression.
Sap velocities (HRM)(cm/h) and sap flux densities (HFD)(cm3/cm2/h) are calculated for each thermistor position in the sensor.
Visualisation is done in 2D (as a function of time) and in 3D (as a function of time and depth).
All graphs are interactive and can be zoomed, scaled and rotated. A top-view surface plot is also available.
2D sap velocities (HRM) or sap flux densities (HFD) are displayed as a function of time and depth. The latter is called the sap velocity (HRM) or sap flux density (HFD) radial profile.
The radial profile at each time instance can be visualised by moving the red marker line across the upper graph. This causes the corresponding radial profile to be shown in the lower graph. Sap wood depth and xylem radius are indicated by red lines on the radial profile graph.
Data from the same sensor but different files can be combined and merged into a single graph curve.
Changes to sensor or wood settings will automatically update the graph data.
Data on the graphs can be manipulated with several data filters. The following filters are available: remove data, interpolate, linear transform (add or multiply data), integrate (calculate surfaces underneath curves), cumulate, sum (e.g. calculate daily sums), average (e.g. calculate daily averages), moving average (smooth data).
All graph data can be exported as text files in order to recreate the graphs in another software package.
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