I think it's explained nicely here:
The Tinymight 2 vaporizer offers two distinct operating modes: On-Demand Mode and Session Mode. Here's a breakdown of each:
On-Demand Mode:
Activation: Press the power button three times quickly to enter on-demand mode; the device will flash to indicate it's ready.
Usage: Hold down the power button to initiate heating. The device heats up rapidly, typically within 2-6 seconds, and vibrates to signal it's ready for inhalation. Release the button after inhaling.
Heating: The heater activates only during inhalation, preserving the herb between draws and minimizing waste.
Ideal For: Users who prefer quick, potent hits without committing to extended sessions.
Session Mode:
Activation: Press the power button three times and continue holding it down until the device vibrates a second time, indicating session mode is active.
Usage: Once activated, the Tinymight 2 maintains a consistent temperature, allowing for multiple draws over an extended period without the need to hold the power button.
Heating: The chamber remains heated throughout the session, continuously vaporizing the herb.
Ideal For: Users who enjoy longer, relaxed sessions with multiple inhalations.
In summary, On-Demand Mode is designed for immediate, potent draws with minimal herb exposure to heat between inhales, making it efficient for quick use. Session Mode, on the other hand, provides a continuous heating experience suitable for extended sessions, allowing for leisurely
consumption over time.
That being said, I really don't like the way the Solo 3 tackles "on demand mode". There's nothing on demand about it. It takes time to heat up (not too long) and the bowl stays hot for awhile after the device turns off, continuously vaporizing the herb (likely the 20% conduction coming into play here).
More like a short session than true on demand.
Likely you would need a 100% convection vaporizer for true on demand.
Just my perspective.