Version 1.2.2 of Sap Flow Tool has been released.

What’s new in this version:

Phyto-IT was present at the 8th International Workshop on Sap Flow in Volterra, Italy. At the booth of ICT International a demo video of Sap Flow Tool was shown throughout the conference.

Pictures of the sponsors area where the Sap Flow Tool demo video was shown:

A short article about Phyto-IT appeared in the April issue of ‘Ondernemers Oost-Vlaanderen’, a monthly magazine about the East-Flanders business world. Read the article here (in Dutch).

Version 1.1 of PhytoSim (“Plant Modelling Made Easy”) has been released.

Key new features:

• Mac OS X version.
• Database input support.
• Handle date and time in inputs.
• Automatically update inputs when new data becomes available.
• Only read parts of inputs.
• previous() function that allows you to get the value of any model component at the previous independent variable value.
• Continuous simulations (simulations which continue when new input data arrives).
• Upper and lower bounds for derived variables.

Version 1.2.1 of Sap Flow Tool has been released.

What’s new in this version:

• Support for time expiring copy protection dongles

On March 4th 2011 Phyto-IT presented itself at the Faculty of Bioscience-Engineering, UGent, Belgium. Besides talking about Phyto-IT as a company, several products where also demonstrated: Sap Flow Tool, PhytoSim and the Leaf Temp algorithm.

The presentation can be found here.

Sap Flow Tool demonstration screencast:

PhytoSim demonstration screencast:

Leaf Temp demonstration screencast:

Version 1.2 of Sap Flow Tool has been released.

What’s new in this version:

• Multiple data files in one project
• SFM sensor support (2nd generation HRM sensor)
• Importing of SFM raw temperatures
• Remove data values above or below a certain value: ideal for outlier/error code removal!
• Interpolate data values above or below a certain value: ideal for outlier/error code removal!
• Modify start and stop time of data filters
• Moving window HFD K-values calculation

+ various other changes and enhancements

Join the Phyto-IT Demo Afternoon at the UGent Faculty of Bioscience Engineering. Invitation and registration can be found here.

Version 1.0 of PhytoSim (“Plant Modelling Made Easy”) has been released. A free 30-day trial is available here.

A paper about the comparison of several sap flow sensors, co-authored by Dirk De Pauw (Phyto-IT), was published in Agriculture and Forest Meteorology. A laboratory test and field evaluation were conducted to determine the accuracy of the three commonly used techniques for measuring sap flux density in trees: heat pulse velocity, thermal dissipation and heat field deformation. In the laboratory test a constant flow rate of water was maintained through freshly cut stem segments of diffuse-porous Fagus grandifolia trees. The three sensor types were measured simultaneously and compared against gravimetric measurements. All three techniques substantially underestimated sap flux density. It is concluded that a species-specific calibration is necessary when using any of these techniques to insure that accurate estimates of sap flux density are obtained, at least until a physical basis for an error correction can be proposed.

Full reference details: