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PHYTOS 31

Leaf Wetness Sensor

Accurately measure the onset and duration of leaf wetness using the PHYTOS 31. Use that real-time data to inform fungicide, pesticide, and frost-protection strategies.

  • Start collecting data in just minutes
  • Reduce false readings with a highly-sensitive sensor surface
  • Visualize data remotely on your PC or phone using ZL6 data loggers and ZENTRA Cloud

Say goodbye to guesswork

The PHYTOS 31 accurately measures both the onset and duration of wetness on a simulated leaf, which in turn predicts when the onset of certain diseases or infections may occur. It’s not only a more accurate instrument, but it’s also the easiest to set up, and when paired with the ZL6 data logger, it gives you access to remote data in real time, making it a smart, simple and straightforward sensing solution.

Accuracy you can feel secure about

Only the PHYTOS 31 ensures that every water droplet is measured. Unlike conventional leaf wetness sensors, its resistance grid doesn’t use salt-laced latex paint, which absorbs water. This gives it extra sensitivity to avoid false positives. So there’s no having to cull data to figure out if the sensor was really wet or not.

Detect ice formation

The PHYTOS 31 uses capacitance technology, so it can sense sub-milligram levels of water condensing on the surface, including frost and ice formation. That way you can establish a threshold that not only indicates when the sensor is wet, but also senses how much water there is. This kind of moisture clarity reduces guesswork and worry about accurately predicting disease conditions.

Simple as nature

When your moisture sensor mimics the energetics of an actual leaf, making measurements is a lot easier. There’s no having to paint your sensor’s non-resistance grid first to get good data. No creating thresholds. And no worrying about lots of wiring. Instead, all you have to do is plug the PHYTOS 31 into the ZL6 data logger, where wet and dry threshold ranges are already programmed in. The result: you save time.

 
Physical Specifications

Dimensions

Length: 12.0 cm (4.7 in)

Width: 5.8 cm (2.3 in)

Height: 0.8 cm (0.3 in)

Operating Temperature Range

Minimum: -40.00 °C

Typical: NA

Maximum: 60.00 °C
NOTE: Sensors may be used at higher temperatures under certain conditions; contact Customer Support for assistance.

Cable Length

5 m (standard)

40 m (maximum custom cable length)
NOTE: Contact Customer Support if a nonstandard cable length is needed.

Cable Diameter

0.165 ±.004 (4.20 ± .10 mm) with min. jacket of .030 (.76 mm)

Connector Types

3.5-mm (stereo) plug, or stripped and tinned wires

Stereo Plug Connector Diameter

3.50 mm

Conductor Gauge

22 AWG/24 AWG drain wire

Electrical and Timing

Supply Voltage

Minimum: 2.5 VDC

Typical: NA

Maximum: 5.0 VDC

Settling Time

10 ms

Output

300−1,250 mV (depends on excitation voltage)

Data Logger Compatibility

Data acquisition systems capable of switched 2.5–5.0 VDC excitation and single-ended voltage measurement at greater than or equal to 12-bit resolution.
Other

Compliance

EM ISO/IEC 17050:2010 (CE Mark)

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