Pull Activation – What It Means in Vaping Devices

Definition

Pull Activation—also called draw-activated or auto-draw—is a firing method in vaping devices that starts the coil and produces vapour only when the user inhales through the mouthpiece. Instead of pressing a fire button, a sensitive pressure or airflow sensor detects the suction of your draw and instantly switches the device on. This design removes the learning curve for new vapers, keeps hand movements minimal, and closely replicates the feel of smoking a traditional cigarette. You’ll find pull activation in most modern Pod Systems, disposable vapes, and ultra-portable kits.

Technical Details

Inside a pull-activated device, a miniature MEMS (Micro-Electro-Mechanical System) or capacitive airflow sensor measures the drop in internal pressure created by your inhale. When the sensor registers a threshold—usually between -2 mbar and -6 mbar—it sends a signal to the chipset, which then applies battery voltage to the coil. The sensor’s response time is typically 60–120 milliseconds, ensuring near-instant vapour production. Variations include:

  • Single-draw – one sensor for mouth-to-lung (MTL) pulls
  • Dual-draw – two sensors for both MTL and restricted direct-lung hits
  • Hybrid activation – combines pull activation with a manual fire button for Power Mode adjustments

Many sensors also include a timeout circuit (6–10 seconds) to prevent overheating and manage Puff Count for battery and e-liquid monitoring.

Usage & Tips

For best performance, take slow, steady draws of 1–2 seconds; sharp or overly strong pulls can confuse the sensor and cause misfires. If vapour feels weak, check for:

  • Condensation blocking the airflow channel—wipe the mouthpiece and base contacts.
  • Low battery—pull-activated devices often reduce wattage before the LED blinks.
  • High-VG e-liquid (above 70 % VG) in a tight pod may restrict airflow; switch to a 50/50 PG/VG blend.

Always store the device upright to prevent e-liquid from reaching the sensor. Because there is no fire button, accidental activation in pockets is rare, but covering the airflow hole with the provided silicone plug during transport is still recommended.

History & Context

Pull activation debuted in early cig-a-like devices around 2010, gained traction with the rise of closed Pod Systems like JUUL (2015), and is now standard in most Australian disposables and refillable pods. Its evolution mirrors the industry’s push toward simplicity, helping smokers transition without learning wattage menus or button sequences.

Share the Post: