PhotonsToPhotos published their sensor measurements for the Pentax K-1 Mark II ($1,996.95), Pentax KP ($896.95) and Pentax K-S1 (already discontinued) DSLR cameras – here are a few comparisons screenshots (click for larger view):
Photons to Photos provides photographic dynamic range graphs from several Pentax cameras and you can compare the test results with many other camera brands (select the desired camera model on the right side) – here are a few examples (click for a larger view):