The SNiP-LWS is a 'Sensor Node Integrated Package' for LoRaWAN communication of real-time plant leaf wetness/duration, indicating the potential development of disease and pathogens and, determining the appropriate time for use of preventative measures. This SNiP allows for continuous plant, light and environmental monitoring.
The base SNiP-LWS integrates 1x AD-NODE and 1x PHYTOS 31 Leaf Wetness Sensor to a site’s unique network, communication and power requirements.
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. The PHYTOS 31 measures leaf surface wetness by measuring the dielectric constant of the sensor’s upper surface. It has a very low power requirement, which gives you the ability to make as many measurements as you want over a long period of time (such as a growing season) with minimal battery usage. This sensor also has very high resolution, which gives you the ability to detect very small amounts of water (or ice) on the sensor surface.
See Further Specifications on the AD-NODE
See Further Specifications on the PHYTOS 31 Leaf Wetness Sensor
Further parameters can be added to SNiP-LWS, without requiring loggers to match each distinct sensor, substantially reducing the cost of getting a fuller picture on the application.
The AD-NODE is designed for those requiring precision in their analogue and digital measurements. With a 24-bit ADC, the AD-NODE supports two RTDs, a 0–10V with compressing range and a 4–20mA input. Each of the four dry-contact digital inputs is capable of simultaneously sampling at 1 kHz, with periodic reporting. Settings on the device can be altered remotely via LoRaWAN™ or locally via USB.
Use the Leaf Wetness Sensor:
LEAF WETNESS SENSOR |
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Measurement Speed: | 10 ms |
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Sensor Type: | Frequency domain |
Output: | 320 – 1000 mV @ 3 V excitation |
Operating Environment: | -40°C to 50°C |
Power: | 2.5 VDC @ 2 mA, to 5 VDC @ 7 mA |
Cable Length: | 5 m standard, custom lengths available |
Cable Connector Types: | 3.5 mm “stereo” plug or stripped and tinned lead wires (3) |
Sensor Dimensions: | 11.2 cm x 5.8 cm x .075 cm |
Data Logger compatibility (not exclusive): | Meter/Decagon Em50 Series, ProCheck |
EXPECTED LIFETIME: | 2 + years of continuous use |
Warranty: | One year, parts and labour |
The PHYTOS 31 measures leaf surface wetness by measuring the dielectric constant of the sensor’s upper surface. It has a very low power requirement, which gives you the ability to make as many measurements as you want over a long period of time (such as a growing season) with minimal battery usage. This sensor also has very high resolution, which gives you the ability to detect very small amounts of water (or ice) on the sensor surface. Water on the sensor surface does not need to bridge electrical traces to be detected, as is common with resistance based surface wetness sensors.
This means that the PHYTOS 31 does not need to be painted before use, which eliminates the need for individual sensor calibration.