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Enabling better global research outcomes in soil, plant & environmental monitoring.


The SNiP-UVI is a 'Sensor Node Integrated Package' for LoRaWAN or CAT-M1 communication of real-time UVI-Index for continuous environmental monitoring.


The base SNiP-UVI integrates 1x MFR-NODE and 1x SKU-440 to a site’s unique network, communication and power requirements.

The SKU-440 UV Index Sensor has a response closely matching the Erythema Action Spectrum, the damaging portion of the solar radiation spectrum associated with sunburn and skin cancer.


See Further Specifications on the MFR-NODE
See Further Specifications on the SKU-440 UV Index Sensor

Further parameters can be added to the SNiP without requiring loggers to match each distinct sensor, substantially reducing the cost of getting a fuller picture on the application. The MFR-NODE can support an added 3x Sensors.

SKU440 Response


The Multifunction Research Node has been designed to provide flexible communication, sensor and power options.

The MFR-NODE supports SDI-12 and 4 x dry contact digital inputs as well as optionally 2x differential / 4x single ended analogue inputs. The MFR-NODE supports sensors with higher power requirements; a solar panel can charge either the internal lithium-ion battery or both the node and sensor can be powered by an external 12V system (e.g. battery or mains source). Optional CAT-M1 provide an option for remote installation and in areas outside the range existing LoRaWAN networks. The optional multiconstellation GNSS ensures you won’t lose track of your device. The MFR-NODE has an onboard 8GB SD Card to provide data logging capabilities and full data redundancy in the event of temporary loss of communications or dropped packets – ideal for research applications.

  • LoRaWAN™ low-power long-range connectivity
  • 8GB SD Card for data storage
  • Supporting SDI-12, 2 x 32-bit dry-contact counting digital inputs.
  • Optional 24-bit ADC for 2x differential / 4x single ended sensor.
  • Optional CAT-M1
  • Solar rechargeable Lithium-ion or external 12V power options
  • Optional Multi-constellation GNSS
  • External solar/battery input: 12-32V DC.


SKU-440 UV Index Sensor

The UV Index sensor gives a voltage output which can be easily scaled to UVI values with an appropriate meter (eg: Skye Apollo Display Meter, SKA 400), where UVI values range from 0 (low risk of sunburn) to 11+ (dangerous levels of UV).

The sensor is calibrated against a reference traceable to National Standards under full sunlight conditions, and so is ideal for long term datalogging on meteorological stations.

The SKU 440 is fully waterproof (IP67). Each sensor is provided with its unique radiation response curve and Calibration Certificate.

Construction Anodised black aluminium, sealed to IP67
Cable Screened 7-1-4-C military specification. Cable gland on sensor housing
Sensor Cosine corrected head. Specially formulated diffuser
Detector Filtered SiC Photodetector
Spectral Response Close to Erythemal Action Spectrum
Output Scaling Nominal = 0-2V = 0.20 UVI = 0-0.5 W/m2
Thermal Drift of Output
(-20 to 50°C)
0.075 mV/°C max
Thermal Drift of Zero Offset
(-20 to 50°C)
Typically 0.03 mV/°C
Output Impedance 500W
Power Supply 5-15 V DC
Absolute Calibration Error Typically < 3%, 5% max.
Cosine Error 3%
Azimuth Error < 1%
Longterm Stability ± 2%
Response Time < 50ms
Weight 200g (with 3m cable)
Temperature Range -30 to 60°C
Mounting M6 x 7mm tapped hole in base. Sensor supplied with M6 x 16mm screw + four 15mm washers to suit panel thickness of 3-10mm