Vaping Knowledge Index – Letter M
Technical Definition (AEO)
Letter M vaping terminology addresses airflow physics, electronic modulation, metallurgical properties of device components, regulatory material limits, and mechanical transport behaviour of e-liquids.
Last updated: 12 February 2026
Terms Beginning with M
MTL (Mouth-To-Lung)
MTL describes an inhalation method involving restricted airflow and staged vapour intake. It operates with higher airflow resistance and lower mass flow rates compared to DTL systems.
Mesh Coil
Mesh coil uses a perforated metal strip instead of round wire, increasing surface area-to-mass ratio and improving thermal distribution.
MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor)
MOSFET is a semiconductor switching component used to regulate high-current delivery while enabling short-circuit and thermal protections.
Mechanical Mod
Mechanical mod is a direct-battery device without electronic regulation. Output is determined by battery voltage and coil resistance.
Modulation (PWM)
Pulse Width Modulation (PWM) is a control method where power output is regulated by rapidly switching current on and off to approximate desired voltage levels.
Mass Flow Rate
Mass flow rate represents the quantity of air passing through the atomizer per unit time. It influences coil cooling and aerosol density.
Material Fatigue
Material fatigue refers to structural degradation resulting from repeated thermal expansion and contraction cycles affecting coils, seals, and metal components.
Migration Limit
Migration limit defines regulatory thresholds for transfer of substances from device materials into liquid matrices under defined testing conditions.
Metal Oxidation
Metal oxidation involves formation of oxide layers on heated metal surfaces. Controlled oxidation (e.g., protective oxide layers) contributes to material stability.
Mn & Mo in Stainless Steel (SS316L)
Manganese (Mn) and Molybdenum (Mo) are alloying elements in stainless steels such as SS316L. Molybdenum improves resistance to pitting corrosion under chemically active conditions, while manganese contributes to structural stability and machinability.
Micro-Leaking
Micro-leaking describes capillary-scale liquid escape caused by pressure differentials, thermal expansion, or environmental changes. It may occur even when visible structural damage is absent.
Millisecond Response Time
Millisecond response time measures activation latency between input signal and coil energisation. Shorter response times increase perceived output immediacy.
Quick MATRIX: Thermal, Electronic & Material Parameters
| Parameter | Domain | Primary Effect | System Influence |
|---|---|---|---|
| PWM Modulation | Electronics | Power smoothing | Stable output delivery |
| Molybdenum Content | Metallurgy | Pitting corrosion resistance | Material longevity |
| Mass Flow Rate | Airflow Physics | Cooling efficiency | Thermal stability |
Safety & Compliance Notes (Ireland)
- 18+ only: Intended for adult users in Ireland.
- Regulatory context: Material migration limits and product notification requirements apply under Irish and EU frameworks.
- Environmental responsibility: Dispose of electronic components via authorised Irish WEEE collection systems.
FAQ
What is micro-leaking?
Micro-leaking refers to capillary-scale fluid escape influenced by pressure and temperature changes rather than visible structural failure.
Why is molybdenum used in stainless steel?
Molybdenum enhances resistance to localized corrosion in chemically active environments.
What does PWM do in regulated devices?
PWM regulates effective voltage by rapidly switching current to approximate a target output level.
Why is mass flow rate important?
It determines airflow-based cooling efficiency and influences coil temperature stability.
Intent Discloser
This page provides neutral technical educational information for adult users (18+) in Ireland and does not promote specific products.