SunScan Canopy Analysis System

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SunScan Canopy Analysis System

The probe has an array of 64 PAR sensors embedded in a 1 meter long probe, and is connected via an RS-232 cable to a handheld PDA. As a reading is taken, all the sensors are scanned and the measurements are transmitted to the PDA.

The average light level along the probe is calculated, and all of the individual sensor readings are available if required for detailed PAR mapping. An operating button on the probe handle enables successive readings to be taken quickly and simply on demand. Alternatively, unattended logging can be conducted under program control from the PDA. Readings are in units of PAR quantum flux (?mol m^-2 s^-1) and units of LAI (m².m^-2).

Features

Measures incident and transmitted PAR in plant canopies
Direct display of Leaf Area Index (LAI)
Unique BF3 Sunshine Sensor reference measures Direct and
Diffuse components of incident light
Usable in cloudy, clear and changeable conditions
Portable, weatherproof and battery powered for unattended logging

Specifications

Active area
1 m x 13 mm wide; sensor spacing 15.6 mm

Spectral response
400-700 nm (PAR)

Measurement time
120ms

Maximum reading
2500 µmol m^-2 s^-1

Resolution
0.3 µmol m^-2 s^-1

Linearity
better than 1%

Accuracy
±10%

Analogue output
1 mV per µmol m^-2 s^-1

Serial interface
RS-232, 9 pin female "D" connector

Environmental
Protected to IP65, 0° - -60° C working temperature

Size (mm) & weight
1,300 (l) x 100 (w) x 130 (h), 1.7kg

Power
4 x AA Alkaline cells (lifetime up to 1 year)