Sap Flow Sensor type SF-L

The SF-L sensor is an improved Granier sensor. The improvements are:

■ Correction of measurement errors due to vertical temperature gradient of tree trunk: the vertical trunk temperature is measured separately and subtracted from the data of sap flow. In this way the sap flow is measured more accurately, and the zero-point of sap flow remains stable for a long time.

■ Continuous determination of water-saturation level of the tree body with a Dendrometer

■ New definition of zero sap flow: sap flow = 0 when the relative humidity in the crown => 100%, and the tree body is saturated with water (indicated by the dendrometer curve)

Advantages

■ Significant higher accuracy

■ Correct identification of zero sap flow

■ Correct Measurement of sap flow in night time

■ Additional data on tree growth measured by dendrometer

■ Reusable sensor

Disadvantages
■ Not suitable for trees with diameters <15 cm

Available Models
■ SF-L 20/33, depth of installation 20-33 mm

■ SF-L 20/43, depth of installation 20-43 mm

■ SF-L 20/63, depth of installation 20-63 mm

Delivery by Standard Version

■ Sensor with 5 cable, weatherproof cap, Aluminium tubes

Options / Ordering Information

■ Cable extension (please specify in meters, but max. 20 m)

■ CCS power supply (one CCS is enough for up to 3 SF-L sensors)

■ Installation tools

■ Data Logger

Technical data