Thanks for everyone’s opinions. I’m pretty certain, I’m going to use Family Software. I’ll need to talk to Bob, to decide what air sampler to get. I currently have a CompuTech race air sampler and Sharp hand held computer. The sampler has a failed humidity sensor, and they can only sell me a replacement, for $475. The sampler has failed twice. I realize it’s old, 2004, but it’s low use and always in the case, in my home when not being used. I can’t trust it anymore. Thanks again.