SF-L Ecomatik Sap Flow Sensor: 4 needles

The SF-L (SF-10) SAP Flow 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 a dendrometer
■ Reusable sensor 

Disadvantages:
■ Not suitable for trees with diameters <15 cm 

Available Models
■ SF-G 20/33, depth of installation 20-33 mm
■ SF-G 20/43, depth of installation 20-43 mm
■ SF-G 20/63, depth of installation 20-63 mm

Delivery of 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). Requires constant current source (CCS) for 3 sap flow sensors (SF-L or SF-G or mixed).
■ Installation tools
■ Data Logger 

Compatible wih Data Loggers:
UX120-006M for up to 4 channels .