Logic Masters Deutschland e.V.

Standard Sudoku rules apply.

Digits along each grey line read the same from both directions. On the thermometer, digits increase from the bulb end to the tip.

Orthogonally adjacent digits are non-consecutive. However, digits in regions which partially contain the thermometer (i.e.: digits in boxes 2 and 3) are not subject to this constraint.

Penpa+. Enjoy!

PS: Here's an interesting 'unrelated' Wikipedia article, which may prove itself a hint if you need it.