GASworks (only sometimes it doesn't)

Here are today's five GAS (Genuinely Approachable Sudoku) puzzles:
GAS 331 – Consec Thermo by Clover: https://tinyurl.com/2k3pyhye
Normal sudoku rules apply. Digits along each thermo must increase CONSECUTIVELY from the round bulb to the tip: for instance, a thermo could contain the sequence 3 4 5 6, but not 3 4 5 7.
GAS 332 – Quadro Sudoku by Sam: https://tinyurl.com/4jh98hsz
Normal sudoku rules apply. No 2x2 area of the grid is allowed to contain all odd numbers or all even numbers.
GAS 333 – The Arrow of Hat Time by Philip: https://tinyurl.com/ye2yy7zk
Normal sudoku rules apply. Digits along arrows must sum to the circled total.
GAS 334 – Full or Half by Clover: https://tinyurl.com/5n6cz3d7
Normal sudoku rules apply. If a square appears at the intersection of four cells, then exactly two of those cells have even digits, and exactly two of them have odd digits (not necessarily in a 'checkerboard' pattern.) If a circle appears at the intersection of four cells, then all four of those cells have the same parity: either all odd, or all even.
GAS 335 – Sequence Sudoku by Sam: https://tinyurl.com/3u8yt87h
Normal sudoku rules apply. Each grey line must consist of an arithmetic sequence; that is, a sequence of numbers with a constant difference between each of the terms, like 1-2-3-4 or 3-5-7-9. The sequence can begin at either end of a line.

▶ SUDOKU PAD - Our New App ◀ NOW AVAILABLE - You can now input your own classic sudoku puzzles into our software using our new App! The app also comes with 12 handmade puzzles from us and it is NOW AVAILABLE at these links:
iOS: https://apps.apple.com/us/app/svens-s...
Steam: https://store.steampowered.com/app/17...  
Android: https://play.google.com/store/apps/de...
On Amazon: Search for “SudokuPad”

▶ OUR PATREON PAGE – JOIN THE COMMUNITY, SUPPORT US AND TRY OUR PUZZLE HUNTS◀
Patreon: crackingthecryptic

▶Our merchandise is all here: ◀
https://cracking-the-cryptic.creator-...

▶ CTC FAN DISCORD SERVER◀
Discord: discord  

▶ OUR BACK CATALOGUE – ALL CATEGORISED WITH LINKS!◀
https://tinyurl.com/CTCCatalogue

▶ WHY NOT TRY OUR CLASSIC SUDOKU APP? ◀
AppStore: https://apps.apple.com/us/app/classic...
Steam: https://store.steampowered.com/app/11...
Android: https://play.google.com/store/apps/de...

▶ OUR KILLER SUDOKU IS ALSO AVAILABLE◀
AppStore: https://apps.apple.com/us/app/killer-...  
Steam: https://store.steampowered.com/app/14...
Android: https://play.google.com/store/apps/de...

▶ THERMO SUDOKU is available too!◀
AppStore: https://apps.apple.com/us/app/thermo-...  
Android:  https://play.google.com/store/apps/de...
Steam: https://store.steampowered.com/app/13...  
Android:  https://play.google.com/store/apps/de...

▶ YOU CAN ALSO TRY OUR ARROW SUDOKU APP ◀ Here are the links:
App Store: https://apps.apple.com/us/app/arrow-s...
Steam: https://store.steampowered.com/app/16...
Android: https://play.google.com/store/apps/de...

▶SEND US PUZZLES TO SOLVE/CONTACT US◀
[email protected]
Snailmail: Mark Goodliffe, Box 102, 56 Gloucester Road, London SW7 4UB

▶FOLLOW US◀
Twitter: #crypticcracking
@crypticcracking
Instagram (for how to solve daily clues from The Times): https://www.instagram.com/crackingthe...

▶Music◀
Tim McCaskey (Guitar) or Lucy Audrin (Piano) or Riffclown plays Mozart's Sonata no 16 ("Sonata Facile")
▶SOFTWARE◀
Play the puzzle in the video by clicking the link under the video (above).  Thanks to Sam Cappleman-Lynes and Sven Neumann for their work.
▶Logo Design◀
Melvyn Mainini

▶Opening Credits Design◀
Joel Blundell

▶ABOUT US◀
Hi! We're Simon Anthony and Mark Goodliffe, two of the UK's most enthusiastic puzzle solvers. We have both represented the UK at the World Sudoku Championships and the World Puzzle Championships. We're also "cryptic crossword" aficionados. Mark is the twelve-time winner of The Times championship and Simon is the former record holder for most consecutive correct solutions to The Listener crossword. We hope we can help your puzzle solving while also introducing you to some of the world's best puzzles.

Thank you for watching!
Simon and Mark