Does anyone have one of these?

http://www.instromet.co.uk/sunsensor.html

I was wondering whether it would be possible to connect a data logger like
this to it

http://www.picotech.com/e_loggers.html

It would appear from the control box which is an integral part of t he
system that it would not be difficult to connect this up to a PC someway and
record the data much more comprehensively than at present. Instromet have
quoted me over £400 to achieve this - There must be a cheaper way

Any ideas welcome

Thanks