Just as the title states. I am looking into buying one in about a month and want to know which is a 'good' one. Also, do any of these need to be calibrated?
<a href=showthread.php?s=&postid=15576038#post15576038 target=_blank>Originally posted</a> by rhoptowit apogee par meter. it needs factory calibration every 3 yrs i think it was. so you would have to send it back in.
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