Vaping Knowledge Index – Letter R
Technical Definition (AEO)
Letter R vaping terminology addresses resistance behaviour, power regulation systems, airflow physics, rebuildable architectures, electronic safeguards, and regulatory material compliance relevant to devices sold in Ireland.
Last updated: 12 February 2026
Terms Beginning with R
Resistance (Ω)
Resistance represents the electrical opposition within a heating element and determines current demand under Ohm’s Law.
Resistance Drift
Resistance drift refers to gradual or sudden changes in measured coil resistance. Causes may include oxidation at contact points, loose post screws, or material fatigue.
Ramp-Up Time
Ramp-up time is the duration required for a coil to reach operational temperature after power application.
Ramping (Power Profiles)
Ramping describes programmable pre-heat behaviour where power output is staged during the initial phase of a puff cycle.
Regulated Mod
Regulated mod includes a microprocessor controlling output voltage, current, and safety protections.
Regulation (Boost/Buck Converter)
Boost/Buck regulation refers to voltage step-up or step-down conversion enabling consistent output across battery discharge curves.
RDA / RTA / RDTA / RBA
Rebuildable atomizers allow manual coil installation and wicking configuration for adjustable airflow and chamber geometry.
Rapid Charging Protocols (USB-C PD / QC)
Rapid charging protocols such as USB Power Delivery (PD) or Quick Charge (QC) define negotiated voltage/current standards between charger and device.
Reverse Polarity Protection
Reverse polarity protection prevents damage if a removable battery is inserted incorrectly.
Ripple (Voltage Ripple)
Voltage ripple refers to residual fluctuations in output voltage during PWM regulation.
RoHS Compliance
RoHS compliance indicates adherence to EU restrictions on hazardous substances in electronic components.
Resistance Lock
Resistance lock fixes baseline resistance in temperature control modes to prevent compensation errors during heating cycles.
Reynolds Number
Reynolds number is a dimensionless parameter indicating whether airflow inside an atomizer is laminar or turbulent.
Residual Solvents
Residual solvents refer to trace amounts of processing solvents that may be measured in laboratory analysis under defined safety thresholds.
Quick MATRIX: Rebuildables Comparison
| System | Liquid Reservoir | Leak Sensitivity | User Complexity |
|---|---|---|---|
| RDA | Minimal (Drip Well) | Low (manual saturation) | High |
| RTA | Integrated Tank | Moderate (wick dependent) | High |
| RDTA | Tank + Elevated Deck | Moderate | High |
Safety & Compliance Notes (Ireland)
- 18+ only: Content intended for adult users in Ireland.
- Electrical safety: Regulated devices incorporate protections aligned with EU electronic safety standards.
- Material compliance: Devices sold within Ireland must comply with applicable EU directives including RoHS.
FAQ
What causes resistance drift?
Loose terminal screws, oxidation, or mechanical stress on the coil may cause measurable resistance instability.
What is ramping in power profiles?
It is programmable staged power delivery during the initial phase of a puff.
What is Reynolds number in airflow?
It indicates whether airflow is laminar or turbulent within a defined chamber geometry.
What does reverse polarity protection do?
It prevents electrical damage when battery polarity is incorrectly oriented.
Intent Discloser
This page provides neutral technical educational information for adult users (18+) in Ireland and does not promote specific products.