PHYTOS 31 Leaf Wetness Sensor

Detect Leaf Wetness and Ice Formation

The PHYTOS 31 leaf wetness sensor is standardised, calibrated, and designed to detect wetness (presence and duration) and ice formation right out of the box. No painting, baking, or user calibration required.

Sensitivity without False Positives

Each sensor is precisely factory-calibrated to detect tiny amounts of water and ice on the leaf surface. The sensor surface coating is non-hygroscopic, eliminating false wetness detection.

Mimics a Real Leaf

The sensor's thin (0.65mm) fibreglass construction closely approximates the heat capacity of a typical leaf and its overall radiation balance closely matches that of a healthy leaf.

Plug and Read

Get straight to the data with the Em50 series of data loggers. Just install the sensor, plug it into the Em50, set the clock and measurement intervals and start logging leaf wetness data. No programming required.

Want to Use a Different Logger? No Problem

Compatible with other data loggers (including Campbell Scientific). Some programming required; sample programs available on request.

Use the Leaf Wetness Sensor:

  • to predict when to spray crops.
  • to quantify water storage in the plant canopy.
  • in studying and monitoring crops for foliar diseases including rust and blight.

See it in Action:

Utah State University's Plant, Soils and Climate department has set up a full weather station and use the Leaf Wetness Sensor to monitor surface moisture.

Measurement Speed: 10 mS
Sensor Type: Frequency domain
Output: 320-1000 mV @ 3V excitation
Operating Environment: -40°C to +50°C
Power: 2.5VDC @ 2mA, to 5 VDC @ 7mA
Cable Length: 5 m, custom lengths availble upon request
Cable Connector Types: 3.5 mm "stereo" plug or stripped and tinned lead wires (3)
Sensor Dimensions: 11.2cm x 5.8cm x .075 cm
Data Logger Compatibility (not exclusive): METER: Em50, Em50G ProCheck
Campbell Scientific: CR10X, 21X, 23X, CR1000, CR3000, etc.
Other: Any data acquisition system capable of 2.5-5 VDC excitation and single ended voltage measurement at 12 bit or better resolution.
Expected Lifetime
2 + years of continuous use
Warranty: One year, parts and labour

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Non UK/Ireland Customers

Non UK/Ireland Customers, please contact METER Environment

Leaf Wetness Sensor- white


  • Accurate
  • Easy to use
  • Detect leaf wetness and ice formation
  • Sensitivity without false positives
  • Mimics a real leaf, so moisture will condense/evaporate as it would on a normal leaf
  • Plug and play capability
  • Use with the EM60G data logger for remote data collection
  • No need to create thresholds when used with the EM60G data logger
  • SDI-12 compatible

Leaf Wetness Sensor
Size: 648.8 KB (664,394 bytes)

Quotation Request

Email us to request a quotation for the PHYTOS 31 Leaf Wetness Sensor