Monitors micro-variations of stem diameter in micron range.

This sensor is a highly precise incremental LVDT-based sensor. Plant growth and water balance affect diurnal behavior of stem diameter. The growth rate depends on a vegetation stage and environmental conditions. The diurnal variations represent mostly fluctuations of water content in plants. Two diameter-based indices are commonly used for evaluating plant water status: daily contraction amplitude and trend of daily maxima.

Range of measurement: 0 - 5 mm
Resolution: 0.005 mm
Temperature stability: 0.003 mm/c° max.
Suitable stem diameter range: 5 - 25 mm
Suitable trunk diameter range: 2 – 7 cm

Monitors micro-variations of trunk radius in micron range.

The Dendrometer is a highly precise incremental LVDT-based sensor. Plant growth and water balance affect diurnal behavior of trunk radius. The growth rate depends on a vegetation stage and environmental conditions. The diurnal variations represent mostly fluctuations of water content in plants. Two radius-based indices are commonly used for evaluating plant water status: daily contraction amplitude and trend of daily maxima. The Dendrometer allows investigating effects of irrigation rate and other environmental factors on water balance and growth of plants.

Range of measurement: 0-10 mm
Resolution: 0.005 mm
Suitable stem diameter range: above 5 cm

Monitors micro-variations of fruit size radius in micron range.

Two phenomena affect fruit diameter. These are growth and internal water content. The growth component is usually dominant. At the same time, in some cases, the fruit may loose water that is manifested in deceleration of growth rate or even shrinkage of the fruit. It may be a result of water stress, lack of light, or another limiting factor. Thus, the FI-type sensor allows investigating effect of irrigation rate and other environmental factors on both water balance and growth of fruits.
Range of measurement: (7 - 30 mm, 30-100mm, 15-70mm)
Resolution: 0.01mm
Temperature stability: 0.005 mm/c° max.
Suitable fruit diameter range: (7 - 30 mm, 30-100mm, 15-70mm)

Measurement range: 2 m
Resolution 2 mm
Cable length: 3 m

The Sap Flow sensors are designed for monitoring relative variations of sap flow rate in a leaf petiole or small shoot.

Approximate range of water flux Rate: ± 3mL/n est.
Interchangeability provided.
Suitable shoot or petiole diameter: 1-5mm, 4-10mm.
External radiation shielding is required (aluminum foil)
Requires external power supply:12v DC,2A

The sensor is a subminiature touch probe that measures absolute temperature of a leaf. The lightweight stainless steel wire clip holds a high precision glass encapsulated thermistor, which is about millimeter in diameter. Small size of the probe and its special design provide almost negligible disturbance of the natural leaf temperature.

Range of measurement: 0 to 50°C
Accuracy: ±0.2°C
Stability: ± 0.5°C over 1 year period

The Dielectric Leaf Wetness Sensor enables accurate leaf wetness monitoring.

Many fungal and bacterial diseases affect plants only when moisture is present on the leaf surface. The Leaf Wetness Sensor determines the presence and duration of wetness on a leaf's surface, enabling researchers and growers to forecast disease and protect plant canopies. Measurement range: Analog signal, proportional to surface watering

Operating temperature −10 to 60 ℃
Protection index - IP 55