I have recently purchased an Xrite 310 densitometer. This is a color densitometer and for that reason has the capability to measure the effects of pyro stain on the blue channel, magenta/green channel (for VC materials), and visual channel (reading without stain effects factored in).
For those who may be using staining developers such as ABC, Pyrocat, or PMK and want to have an accurate reading of the density spread of your negatives (contrast range), I will read these for you at no charge if you will send them to me (maximum two negatives) and include a self addressed and stamped return envelope.
Additionally, this densitometer does have capability of reading a prints reflection density. If you have a desire to know your print's Dmin and Dmax I will read a representative print's values if you include one as well.
My address is Donald Miller Photography, P.O. Box 48094,,Wichita,,,Kansas 67201