The method for determining the remaining amount of e-liquid in electronic cigarettes needs to be combined with the type of device and the usage scenario, and a comprehensive judgment should be made from multiple dimensions such as vision, touch, device feedback and auxiliary tools. The following are the detailed classifications and operation suggestions:
Transparent oil storage tank equipment (such as most open rechargeable e-cigarettes)
Direct observation method
Operation: Determine by the scale lines of the transparent oil storage tank or visually inspecting the liquid level height.
Example: If the capacity of the oil storage tank is 2ml, the liquid level should be replenished in time when it drops below 1/4 (about 0.5ml).
Precautions: Avoid tilting the equipment to prevent liquid level distortion. It is recommended to observe vertically.
2. Non-transparent oil storage tank equipment (such as some enclosed disposable electronic cigarettes)
Weight perception method
Operation: Comparison of the weight of the new equipment with that after use.
For example, the initial weight of a 3ml e-liquid device of a certain brand is 50g. After the e-liquid is exhausted, it is approximately 40g. The remaining amount can be estimated by weighing.
Tool recommendation: Use an electronic scale (with an accuracy of 0.1g) to assist in judgment.
Absorption resistance variation method
Principle: The reduction of e-liquid leads to dry burning of the atomizing core, an increase in suction resistance, and a sudden decrease in smoke volume.
The criterion for judgment: When the amount of cigarette smoke decreases significantly after three consecutive smokes, the remaining e-liquid is usually less than 10%.
3. Oil-injected electronic cigarettes (such as RTA/RDA atomizers)
Observe through the oil level window
Operation: Check the liquid level through the oil level window on the side of the atomizer or the transparent glass chamber.
Tip: Tilt the equipment at a 45° Angle to observe the relative position of the liquid surface and the air inlet hole to avoid dry burning.
1. Changes in smoke volume and taste
Reduced smoke volume: When the e-liquid is insufficient, the atomization efficiency decreases, and the smoke volume significantly reduces.
Deterioration of taste: The appearance of a burnt, dry or off-flavors indicates that the atomization core has been partially dry-burned.
2. The equipment indicator light indicates
Some smart devices: The remaining percentage of e-liquid is displayed through color changes of LED lights (such as red light flashing) or on the screen.
Example: When the e-liquid level of a certain brand of equipment drops below 15%, the indicator light flashes once every 3 seconds.
1. Carry equipment when going out
Portable tools: Use a mini electronic scale or a graduated oil bottle (such as a 10ml graduated dropper bottle) to estimate the remaining amount.
Backup plan: Carry spare e-liquid cartridges or small-capacity e-liquid bottles (such as 10ml ones) in case of shortage.
2. High-frequency usage scenarios (such as parties, games)
Regular inspection: Check the e-liquid level every 30 minutes to prevent dry burning caused by continuous suction.
Early warning mechanism: Set an alarm on your mobile phone to remind you, or use an e-cigarette APP that supports Bluetooth connection (such as some Smok devices) for real-time monitoring.
Avoid over-reliance on a single method:
For instance, merely judging from the change in suction resistance might lead to misjudgment due to the aging of the atomization core, and visual observation should be combined.
Be vigilant against the interference of condensate:
The condensate may accumulate at the top of the oil storage tank, which may be misjudged as remaining e-liquid. The equipment needs to be tilted to observe the actual height of the liquid level.
Replace the atomization core in time:
Even if there is sufficient e-liquid, the aging of the atomizing core (such as after more than two weeks or after inhaling 50ml) will also lead to a deterioration in taste, and it needs to be replaced simultaneously.
Best Practice:
Transparent oil storage tank: It is preferred to use the dual judgment of scale lines and smoke volume.
Non-transparent devices: Combining weight perception, resistance variation, and usage duration estimation.
Oil-injected equipment: Regularly check through the oil level window to avoid dry burning.
Tool recommendation:
Basic version: Transparent scale oil storage tank, electronic scale.
Advanced version: Bluetooth-enabled e-cigarette devices (such as the Vaporesso XROS series), graduated gas filling bottles.
Through the above methods, users can accurately grasp the remaining amount of e-liquid, avoid dry burning damage to the equipment, and at the same time optimize the user experience.