Light Sensors Continued
2 and 4-Channel Sensors

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Red/Far-Red Sensor (SKR 110)

A 2-channel sensor with narrow band filters centred at 660nm and 730nm. A very popular filter combination important for plant phytochrome studies, and controlling plant responses in mixed lighting conditions.

SKR 110S

A 2-channel sensor made to the same specifications as the SKR 110, but with user-defined filters.

For example 570nm and 680nm, 660 nm and 780nm

Incident and/or Reflected Light 
(SKR 1800 series)
Sensors for NDVI

Specialised sensors for those who need to measure reflected as well as incident light at two or four different wavelengths.  These units can be used either with or without the cosine collecting adapter in place on top of the sensor. Clearly with the adapter in place the light measured by the two or four channels of the sensor is from a cosine (hemispherical) distribution.  If the adapter is removed, then the two or four channel narrow acceptance angle channels are exposed for use with light reflected from the surface to be studied. Wavelengths and bandwidths can be ordered between 400 and 1050nm..                      

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Fibre Optic Probe (SKR 116

A one or two channel radiometer with a long fibre optic probe extension. The light is collected from the tip of the probe at right angles to its long axis.  Thus the probe can be inserted in short grass sward and collect down-welling light.  The filters and diodes are housed in a small ABS box, which is neatly mounted with the measuring unit to make a compact hand-held system.  The response of this probe can be can be chosen from the standard range of sensors, eg.  a red/far-red (660/730nm) response