
Aroma lamps, or diffusers, are used to diffuse
essential oils
An essential oil is a concentrated hydrophobic liquid containing volatile (easily evaporated at normal temperatures) chemical compounds from plants. Essential oils are also known as volatile oils, ethereal oils, aetheroleum, or simply as the o ...
. They may project the oil into the air by heating it, letting it evaporate naturally, or
nebulizing it using compressed air or ultrasonics.
Evaporative diffuser
An evaporative diffuser is a device that uses a pad, filter, or
reed
Reed or Reeds may refer to:
Science, technology, biology, and medicine
* Reed bird (disambiguation)
* Reed pen, writing implement in use since ancient times
* Reed (plant), one of several tall, grass-like wetland plants of the order Poales
* Re ...
s to diffuse the essential oils.
One of the disadvantages of this tool is that the light elements of the essential oils will be circulated around the ceiling first and will only come down at the end of the process.
Heat diffuser

A heat diffuser contains a small candle under a bowl to vaporize a mixture of water and oil. This device is very cheap and doesn't need a special maintenance, however, the heat can change the chemical structure of the oils.
Certain plug-in
nightlight
A nightlight is a small light fixture, usually electrical, placed for comfort or convenience in dark areas or areas that may become dark at certain times, such as at night or during an emergency. Small long-burning candles serving a similar fun ...
units made by companies such as
Air Wick are used in combination with glass bulbs of scented oil, filling a room with fragrance and light.
Nebulizer
A
nebulizer
In medicine, a nebulizer (American English) or nebuliser (English language, English) is a drug delivery device used to administer medication in the form of a mist inhaled into the lungs. Nebulizers are commonly used for the treatment of asthma, c ...
is a device that does not use water or heat as other diffusers. The bottle of essential oil is attached directly to the nebulizer. As a result, the unit uses 100% pure essential oil. The benefit of using this device is a strong concentration of the essential oil. However, it can be noisier than the other devices depending on the specific model in use.
Ultrasonic diffuser
An ultrasonic diffuser is the same as a nebulizer but uses a water/oil mixture. This makes the mist not so concentrated. This device can be used as a
humidifier
A humidifier is a household appliance or device designed to increase the moisture level in the air within a room or an enclosed space. It achieves this by emitting water droplets or steam into the surrounding air, thereby raising the humidity.
...
. These diffusers contain an
ultrasonic transducer
Ultrasonic transducers and ultrasonic sensors are devices that generate or sense ultrasound energy. They can be divided into three broad categories: transmitters, receivers and transceivers. Transmitters convert signal (electrical engineering), ...
, which vaporizes the water/oil mixture through
cavitation
Cavitation in fluid mechanics and engineering normally is the phenomenon in which the static pressure of a liquid reduces to below the liquid's vapor pressure, leading to the formation of small vapor-filled cavities in the liquid. When sub ...
and creates instantaneous vapor.
See also
*
Aromatherapy
Aromatherapy is a practice based on the use of aromatic materials, including essential oils and other aroma compounds, with claims for improving psychological well-being. It is used as a complementary therapy or as a form of alternative medic ...
*
Censer
A censer, incense burner, perfume burner or pastille burner is a vessel made for burning incense or perfume in some solid form. They vary greatly in size, form, and material of construction, and have been in use since ancient times throughout t ...
References
{{Artificial light sources
Aromatherapy
Essential oils
Home appliances
Types of lamp