The term smoke pen can refer to different products depending on the context. In some cases, it may refer to a tool used for detecting air movement and leaks, which produces smoke to help identify the direction and strength of airflow. For example, the Smoke pen 220 from the American brand REGIN is such a tool, used for air balancing, verifying ventilation, testing smoke detectors, and testing negative or positive pressure, among other applications. This type of smoke pen uses a non-toxic smelt core that can be ignited with a match or lighter to produce a continuous smoke trail, and the smoke can be extinguished by capping the pen.

On the other hand, smoke pen might also refer to disposable vape pens or electronic smoking devices, which are portable electronic devices used to heat liquids or concentrates containing nicotine, tetrahydrocannabinol (THC), or cannabidiol (CBD) to produce vapor that can be inhaled. Disposable vape pens come pre-filled and are thrown away after use. They typically include a container with liquid and a pre-charged battery, and they are activated by drawing on the mouthpiece to heat and produce vapor.

When considering the use of any type of smoke pen, it is important to understand its purpose, how to use it, and the associated safety and legal requirements. For detection tools, it is necessary to ensure they are used in the proper environment and under the right conditions to avoid any potential health or safety risks. For electronic smoking products, users should be aware that they may contain nicotine, which is a highly addictive substance, and the long-term health effects are still being studied. Additionally, the use of electronic smoking devices may be legally restricted or prohibited in some areas, so it is important to check local laws and regulations before use.