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2
Sensors & Accessories
2.1 Compatible Sensors
The LI-250 is compatible with all LI-COR type 'SA' radia-
tion sensors. It is important that the LI-250 be properly
configured for the specific sensor used. A quantum sensor
must be used to make measurements of photosynthetically
active radiation (
µ
mol s
-1
m
-2
of PAR), a pyranometer for
measurements of solar radiation (W m
-2
), and a photometric
sensor for measurements of illuminance (lux). For
example, it is not possible for a pyranometer to read out in
units of lux. If you want to configure the LI-250 to read out
in lux, you must use the photometric sensor.
LI-COR type 'SB' radiation sensors are also compatible if
the Calconnector (Calibration connector) is detached from
the BNC connector.
LI-COR type 'SZ' radiation sensors are not compatible with
the LI-250; they may, however, be fitted with a BNC con-
nector. Contact LI-COR for further information.
Recalibration of all LI-COR radiation sensors is rec-
ommended every two years.
Complete information concerning the sensors that can be
used with the LI-250 is found in the type 'SA' LI-COR
Radiation Sensors instruction manuals. In addition, several
technical reports on LI-COR sensors are available. These
