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SF-G Ecomatik Sap Flow Sensor (2 needles)
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Typical Granier Sap Flow Sensor with two needles. For trees with a diameters >2 cm.
Sap flow sensors are used to continuously measure water uptake in trees and woody plants.
The SF-G range corresponds to the classic two-needle model developed in 1985 by André Granier.
It requires use of the CCS to feed the current.
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| The Sensor measures: | Sap Flow |
| Cable Length: | 5 meters |
| Power Supply: | 12 V |
| Sensor for use in: | Outdoor |
The SF-G (SF-20) SAP Flow Sensor is the typical Granier sensor and consists of two needles.
Advantages:
■ Suitable for tree diameter >2 cm (see available models)
■ Reusable sensor
Disadvantages:
■ Temperature difference between the needles are superimposed by the vertical variation of Stem temperature (up to + / -2.5 ° C). This leads to unpredictable errors of over 100%.
■ Sap flow at night can not be measured. Due to the temperature overlays the night values are incorrectly set to zero.
Compatible wih Data Loggers:
UX120-006M for up to 4 channels.
H22-001 .
Options / Ordering Information:
■ Cable extension for SF-G (please specify in meters, but max. 20 m)
■ CCS Constant Current Power Supply (one CCS is enough for up to 3 SF-G sensors). Requires constant current source (CCS) for 3 sap flow sensors (SF-L or SF-G or mixed).
■ Installation tools
■ Data Logger
| Name | Sap Flow Sensor Type SF-G |
| Needle size | Diameter 1.5 mm, Length 33, 43, 63 mm |
| Cable length | 5 m, extendable to 20 m |
| Suitable for tree size | Diameter> 2 cm |
| Power supply | A CCS supplies up to 3 sensors and consumes 1 W (12 V x 84 mA DC, stabilized) |
| Output | 0 µV to 1000 µV DC |
Options / Ordering Information:
■ Cable extension (please specify in meters, but max. 20 m)
■ CCS Constant Current Power Supply (one CCS is enough for up to 3 SF-G sensors)
■ Installation tools
■ Data Logger
Accessories
| SF 20 SF-G Sap Flow Sensor with 5 m cable, needle/heating length 33//20 mm. Incl. 1 radiation protection shield 60 cm x 60 cm, 2 Aluminium tubes, 1 tube silicon paste and 1 tape adhesive tape for sealing the protection shield. |
| SF 21 SF-G Sap Flow Sensor with 5 m cable, needle/heating length 43//20 mm. Incl. 1 radiation protection shield 60 cm x 60 cm, 2 Aluminium tubes, 1 tube silicon paste and 1 tape adhesive tape for sealing the protection shield |
| SF 22 SF-G Sap Flow Sensor with 5 m cable, needle/heating length 63//20 mm. Incl. 1 radiation protection shield 60 cm x 60 cm, 2 Aluminium tubes, 1 tube silicon paste and 1 tape adhesive tape for sealing the protection shield |
| SF 23 SF-G Sap Flow Sensor with 5 m cable, needle/heating length 18/10 mm. Incl. 1 radiation protection shield 60 cm x 60 cm, 2 Aluminium tubes, 1 tube silicon paste and 1 tape adhesive tape for sealing the protection shield |
| SF 25 SF-G Sap Flow Sensor with 5 m cable, needle/heating length 33/20 mm |
| SF 26 SF-G Sap Flow Sensor with 5 m cable, needle/heating length 43/20 mm |
| SF 27 SF-G Sap Flow Sensor with 5 m cable, needle/heating length 63/20 mm |
| SF 28 SF-G Sap Flow Sensor with 5 m cable, needle/heating length 18/10 mm |
Examples:
■ SF-20: SF-G 33 // 20, mounting depth 20-33 mm
■ SF-21: SF-G 43 // 20, mounting depth 20-43 mm
■ SF-22: SF-G 63 // 20, mounting depth 20-63 mm
And available in cable lengths of: 5m, 10m, 15m and 20 meters.
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