More random Bowle babbling:
Forgot to mention the in-stream thermocouple wire. Sure someone will correct me, but I believe Bowle is the first to attempt airflow temperature sensing directly before the herb load. Traditional schemes involve sensing temp at the heater, then subtracting a constant to estimate air flow temp
In pic above a few posts, can see the three ceramic parts. The top two sandwich the coil. Only purpose for the bottom piece is to hold the thermocouple wire. Clever. You can see it stretching across to opposing side grooves, then under, positioning the wire to be taut and straight along the diameter of air hole above screen in puck
My dissection was inspired by curiosity about the heater, and wondering what the loud rattle was. While I successfully solved the rattle by tossing out the piece, I also lost the locking ball for stem. No reason to open puck other than curiosity. Now you don't have to
I am frankly impressed by the coil-in-a-ceramic sandwich heater. But, more restrictive flow in this design than "wide open" coil or mesh heaters, but more consistent and efficient. Suppose this is how they can have such a relatively low capacity battery? Takes less power to heat that tiny coiled coil insulated by ceramic than other designs, which require more coil surface area for similar heat transfer results
Bonus -- ceramic sandwich is like a mini oven. Ceramic is "pre-heated" by coil via sandwich'ed conduction when in light blue standby mode
Good heat transfer from coil to air molecules, lots of turbulence in that narrow circular tunnel pathway
As I previously mentioned, I'm very impressed with the isolation of electronics from airpath and heater. Literally a wall dividing the two regions! Black and red wires feed through wall in a small corner hole, hugged by the silicone gasket which seals from leaks
BTW, that battery would be a royal bitch to replace, I wouldn't even think about it with all those wires and solder points and lions and tigers and bears
Edit:
marine layer of fog enveloped us tonight
Can't even see Star of India
Draw has that signature Bowle sound
Hello darkness, my old friend...
Within... the sound... of turbulence