SFM1x Sap Flow Meter with IoT connectivity

The SFM1x Sap Flow Meter is a powerful sap flow sensor for measuring tree and plant water use. Measuring the movement of water through the xylem within the sapwood area, sap flow measurement allows the quantification of the water requirements of the plant or tree. Applying the Heat Ratio Method to measure tree and plant water use, the SFM1x Sap Flow Meter (Cellular and LoRaWAN versions) is a fully integrated Internet of Things device with full internet connectivity. The use of the Heat Ratio Method provides accurate measurement of the full range of sap flow, from low and reverse flow, to flow rates experienced in high water use species. This is all captured by a device featuring advanced electronics that provide optimum power management, along with in-built calculations and storage of data including diagnostics. The embedded IoT functionality enables remote monitoring of data and better tree water use insight through visualisation dashboards such as Eratos, where further data processing can be undertaken along with integration with other data streams to provide comprehensive measurements of the soil-plant-atmosphere continuum, where the plant can act as the ultimate status signal of the whole continuum.

These features make SFM1x Sap Flow Meter ideal in:

• ecophysiological research in natural and built environments
• forestry and agriculture
• urban and remediation
• irrigation decision making
• species selection and and plant transpiration measurement

SFM1x options include:

• SFM1x-C: CATM1/NB-IoT (cellular)
• SFM1x-L: LoRaWAN Frequency Options:
  • SFM1x-AS923
  • SFM1x-AU915
  • SFM1x-CN470
  • SFM1x-EU868
  • SFM1x-IN865
  • SFM1x-US915
• SFM1x-UB: Bluetooth and USB only

	DESCRIPTION
Needle Diameter/Length	1.3 mm / 35mm
2 Measurement Spacings per Needle	7.5 mm and 22.5 mm from the needle tip
Output Options	Raw Temperatures: °C Heat Pulse Velocity: cm hr-1 Sap Velocity: cm hr-1 Sap Flow: Litres hr-1
Measurement Range Approx	-70 ~ +70 cm hr-1
Resolution / Accuracy	0.01 cm hr-1 / 0.5 cm hr-1
Measurement Duration	120 seconds
Heat Pulse Default (User Adjustable)	20 Joules typical Equivalent to 2.5 second heat pulse duration, auto scaling
Adjustable Logging	Interval Minimum: 10 mins

Communication Options

• SFM1x-C: CATM1/NB-IoT
• SFM1x-L: LoRaWAN Frequency Options:
  • SFM1x-AS923
  • SFM1x-AU915
  • SFM1x-CN470
  • SFM1x-EU868
  • SFM1x-IN865
  • SFM1x-US915
• SFM1x-UB: Bluetooth and USB only

Case studies

Downloads and Technical Info

Scripts And Calculations