This one is a UV filter device. I also bought a non-UV filter unit. It should arrive in a few days. -------------------------------------------- On Mon, 10/6/14, Graeme Gill <graeme@xxxxxxxxxxxxx> wrote: Subject: [argyllcms] Re: i1 pro - eye one pro - spotread error To: argyllcms@xxxxxxxxxxxxx Date: Monday, October 6, 2014, 12:02 AM Alan Rockwood (Redacted sender alanrockwood2000@xxxxxxxxx for DMARC) wrote: > Checking white reference failed, 0.11 < avg01 0.009096 < 0.22, 1.35 < avg2227 1.470756 < 1.6 Hmm. avg01 is rather low for a non-UV filter device. Precisely what it means, I don't exactly know. Graeme Gill.