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


The SNiP-LPAR is a 'Sensor Node Integrated Package' for LoRaWAN communication of the plant or canopy's real-time inception of light, for continuous plant, light and environmental monitoring.


The base SNiP-LPAR integrates 1x AD-NODE and 1x LINPAR Linear PAR Sensor to a site’s unique network, communication and power requirements.

The LINPAR Sensor is designed for long term monitoring of canopy light interception. LINPAR consists of 33 individual internal PAR sensors along a 1m length wand. PAR readings are averaged across all 33 sensors to give a single output value.


See Further Specifications on the AD-NODE
See Further Specifications on the LINPAR Linear PAR Sensor

Further parameters can be added to SNiP-LPAR, without requiring loggers to match each distinct sensor, substantially reducing the cost of getting a fuller picture on the application.


The sensors are covered with a 3mm diffuser providing an integrated reading over 850mm section of the sensor. At the cable end there are no sensors in the first 70mm and in the last 50mm at the distal end to provide for attachment. An integral “bulls eye” levelling sensor is provided.

For complete canopy monitoring solutions the LSM-LINPAR can be used with the SFM1 Sap Flow Meter, PSY1 Psychrometer and a Dendrometer.

  • The LINPAR is ideally suited to be connected to the Light Sensor Meter (LSM)
  • The LSM can support up to 10 light sensors for complete canopy light characterisation
  • Variables calculated include PAR, leaf area index, sunflecks, and canopy extinction co-efficient

AD-NODE: For High Resolution Analogue & Digital Sensors

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.

  • LoRaWAN™ low-power long-range connectivity
  • 2x 24-bit RTD
  • 1x 24-bit Voltage input (0-10 V with compressing range)
  • 1x 24-bit 4-20 mA
  • 4x 32-bit dry-contact counting digital inputs, 2 x digital outputs
  • 400 Hz 3-Axis Accelerometer
  • 3 x AA Lithium Energizer battery
  • Fully reconfigurable via LoRaWAN™ downlinks


The LINPAR Linear PAR Sensor

LINPAR is ideally supported by the LSM1 Light Sensor Meter for PAR Sensors in combination with the SQ-110 PAR Sensor. Up to 9 LINPAR sensors can be connected to the LSM1 Light Sensor to measure light within and beneath the canopy, and the SQ-110 installed above the canopy to measure ambient light. The data can then be converted to leaf area index or fraction of absorbed radiation.


Materials Anodised Aluminium, Acrylic. IP65 sealed
Cable 5m Enhanced polyethylene screened twin 18 x 0.1mm
Sensor 33, GaAsP Photodiodes. 350 – 680nm. Peak at 640 nm
Sensitivity 1 mV/10 µmol / m2 / s (V version)
Temperature Sensitivity ± 0.15% °C at peak response, from 0 – 50°C
Linearity 1% over 0 – 2000 µmol/m2/s
Uniformity of Sensing Surface Better than 2% over 0.85 sensing length
Response Time 2µs. 10 – 90%
Output V version (Voltage Version): 200mV/2,000 µmol/m2/s
A version (Current Version): ~1.8 µA/2,000 µmol/m2/s
Operating Temperature Range -20°C – +50°C
Cable Connections Blue … 0
Clear … +
Screen … Uncoated wire connected to plastic screen
Dimensions 1.2 cm x 1.5 cm x 1m
Materials Anodised aluminium and acrylic