Implexx Sap Flow Sensor

• A low cost, calibrated, SDI-12 enabled, heat pulse sap flow sensor;
• A versatile digital solution so you can allocate more funds to sensors and less to data loggers;
• Increase sample size and replication;
• Output calibrated sap flow, heat velocity, stem water content, stem temperature, and more;
• Calibrated and scientifically backed with peer-reviewed publications.

• Easy to install and requires little ongoing maintenance;
• Outputs a comprehensive range of 33 parameters per measurement;
• Or simplifies it down to a single output of calibrated sap flow;
• Output raw temperature data for your own models and equations;
• SDI-12 protocol so it can be supported by a large range of data loggers.

The Implexx Sap Flow Sensor is supported by the SDI-12 protocol which gives it tremendous flexibility to connect to many data logging devices.

Implexx is supported by a world-wide team of dealers who can provide a comprehensive range of data logging solutions. This includes the complete range of Campbell Scientific data loggers and many more brands.

Alternatively, the Implexx Sap Flow Sensor can be integrated into your existing data logging infrastructure. Implexx provides a comprehensive range of guides and manuals to assist you, or you can contact us for further assistance.

The Implexx Sap Flow Sensor is a heat pulse style sap flow sensor therefore it requires relatively low power. The Implexx engineers have added features to the Implexx Sap Flow Sensor to further improve the power efficiency of our sap flow sensor. The Implexx Sap Flow Sensor is therefore an ideal sensor for measuring sap flow in forests and remote field sites.

In our experience, we`ve installed the Implexx Sap Flow Sensor at field sites with the following power requirements:

• A 20W solar panel, with a 12V 9 amp hour battery, supporting 12 x Implexx Sap Flow Sensors plus a modem, 12 x dendrometers, soil moisture and air temperature sensors;
• A 5W solar panel, with a 12V 7 amp hour battery, supporting 2 x Implexx Sap Flow Sensors;
• A stand-alone 12V, 9 amp hour battery, with a 30-minute logging interval, supporting 1 x Implexx Sap Flow Sensor for 30 days.

The Implexx Sap Flow Sensor is the only commercially available heat pulse sensor that can measure the entire observable range of heat velocity and sap flow in plants.

The Implexx Sap Flow Sensor sensor utilizes the Dual Method Approach (DMA) heat pulse method which has a measurement range is between -200 to >1000 cm/hr (heat velocity) or -100 to >2000 cm³/cm²/hr (sap flux density).

The Implexx Sap Flow Sensor wide measurement range compares with the narrow range of the heat ratio method (HRM; -10 to +15 cm/hr), or the inability of the compensation heat pulse method (+5 to >1000 cm/hr) and Tmax (+10 to >1000 cm/hr) to measure at slow velocities (Forster, 2019). The inability of the other heat pulse methods to measure the entire range of sap flow in plants means they are unreliable, inaccurate and can lead to misinterpretation of data. The Implexx Sap Flow Sensor is the only reliable sensor that can measure the entire range of sap flow in plants.

Recent reviews of sap flow methods have strongly recommended that sap flow sensors are calibrated for the trees they are measuring (Steppe et al., 2010; Forster, 2017; Flo et al., 2019). Without a species-specific, or site-specific, calibration, the average error in sap flow estimation is 35% (Forster, 2017).

The Implexx Sap Flow Sensor is the only sap flow sensor available that has a built-in calibration. The Implexx Sap Flow Sensor calibration has been supported by scientific studies demonstrating its accuracy across taxonomically diverse range of 15 woody species. The main output from the Implexx Sap Flow Sensor is calibrated sap flow.

But, as any good scientists knows, you should always check a sensor`s calibration against your own standard. Therefore, we provided all the raw data required to check measurements and to perform your own calculations.