Introduction
4
1.1
1. Introduction
PAR Sensor
Some users of the YSI EXO sonde may wish to
incorporate a photosynthetically active radiation
(PAR) sensor into their field monitoring equipment.
This sensor can be added to the YSI EXO2 sonde
in the form of a special adapter engineered by
YSI’s Integrated System & Services division. This
appendix is designed to give potential users of
this PAR adapter information on how the system is
configured and the steps necessary to acquire and
log PAR data with the EXO PAR adapter.
1.2
Overview
Li-Cor PAR sensors are required for the EXO PAR adapter and these sensors can either be supplied to YSI by the
customer (brass mounting screws provided with the sensor are required for installing on the par system) or can be
purchased from YSI as part of the complete system. These sensors are then mounted to arms which extend from the
sonde on either side. Output cables are then attached to the sensors which connect to the EXO PAR adapter, which in
turn connects to the EXO2 Auxiliary port on the top of the sonde, as show in Figure 1.
Figure 1 shows the installation of two sensors (one pointing up, the other pointing down), but it is also possible to use a
single PAR sensor in either an upward or downward looking configuration.
Your EXO PAR system is shipped separate from your EXO2 sonde and can be installed onto the EXO2 sonde following
these easy steps.
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Figure 1
EXO PAR adapter with Sonde
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