hey Victor, if you look at apogee's web page they make a PAR sensor that you use a milti meter to read. the price is a lot lower also as it is just a sensor. I think Darren has already been in touch with them and is inquiring about it. I also found a link to the BC goverment and the built there own and they give you all the part #'s and the drawings to make it yourrself.
Apogee
how to make a PAR sensor
oh I would be interested in making a PAR sensor if anyone else would like to also.. would cut down on shipping of the photo diode and might drop the price as 1 to 9 is 24.00 us each and 10 to 19 are 13.00 each. there is also a cheeeper one that is 6.00 each but I have to read to see the dealon that one again.
Steve
[ 05 January 2002: Message edited by: StirCrazy ]