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EMS81 SDI-12 Sap Flow system (digital SDI-12 output)
EMS Brno EMS81 SDI-12 sap flow system with SF 8X SDI-12 module, SF81 sensor and THB method for trees from 12 cm DBH.
EMS81 SDI-12 sap flow system
EMS81 SDI-12 by EMS Brno is a sap-flow measurement system with digital SDI-12 output, designed to assess tree water regime under field conditions. The system is based on the tissue heat balance (THB) method, with variable power and constant temperature difference.
The configuration uses the SF 8X sap-flow module (SDI-12), SF81 sensor, stainless electrodes, weather shields, connecting cables, DR26E stem increment sensor and datalogger. It is intended for stems from 12 cm DBH and provides results in kg/h per plant or kg/h per cm of stem circumference.
The SDI-12 output supports integration with third-party dataloggers. The manufacturer highlights that the constant-temperature-difference control avoids overheating of stem tissues and gives a realistic picture of tree water status. Mini32 software supports long time series, baseline processing, quick statistics and net sap-flow calculation.
| Reference | EMS81 SDI-12. |
| System | EMS81 sap flow system with digital SDI-12 output. |
| Method | Tissue heat balance (THB) method with variable power and constant temperature difference. |
| Application | Assessment of tree water regime and field sap-flow measurement. |
| Stem diameter | For stems from 12 cm DBH. |
| Output units | kg/h per plant or kg/h per cm of stem circumference. |
| Output | Digital SDI-12 output for integration with third-party dataloggers. |
| Module | SF 8X sap-flow module (SDI-12). |
| Main sensor | SF81 sap-flow sensor with stainless electrodes. |
| Additional input | Input for DR26E stem increment sensor. |
| Temperature difference | Constant temperature difference adjustable to 1, 2 or 3 K. |
| Software | Mini32 support for time series, baseline commands, quick statistics and net sap-flow calculation. |
| Components | SF 8X SDI-12 module, SF81 sensor, stainless electrodes, weather shields, cables, DR26E sensor and datalogger. |
| Advantages | Efficient field measurement, no overheating of stem tissues and realistic picture of tree water status. |
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