Almost all devices emit smells. The difficulty lies in constructing devices which don't. That's why explosive-detecting dogs are so successful, for example
Radiological Exposure Devices (REDs)
Pure gold is odorless. Any scents that you detect are imperfections found in the metal. I have heard the saying "Smell The Gold" but I have never known Gold to have any kind of Odor.
Smells during an earthquakes may be from released gases previously trapped under the ground, gas lines that have cracked, or from the resulting fires.
Phenol red itself does not have a strong odor. However, if contaminated or in specific conditions, it may emit a slightly sweet or medicinal smell.
Opals are a type of mineral composed of silica and water, so they do not have a distinct smell. The smell of a material is typically due to volatile compounds that are released into the air, which opals do not contain. Therefore, if you encounter an opal that has a smell, it may have been exposed to other substances that are imparting an odor onto it.
Magnets do not have a characteristic smell. The sense of smell is triggered by chemicals in the air, but magnets do not emit any scent.
No, diamonds do not have a smell. They are made of pure carbon arranged in a crystal structure, which does not emit any odor.
Normally Plasma televisions do not emit smell. When a TV is brand new, a part might heat up and burn off a piece of glue. Otherwise, it should not emit a smell. Normally, it would not emit a smell.
Boron itself is odorless. It is a solid metalloid that does not emit any discernible smell.
Yes, there are devices called scent diffusers or aroma diffusers that can emit pleasant smells when heated or when essential oils are added. These devices often use technology like ultrasonic vibrations or heat to disperse the scent throughout a room.
Yes, mushrooms can emit a noticeable earthy or musty smell when they are growing.
Palladium metal is odorless and has no distinctive smell. It does not emit any noticeable odor under normal conditions.
Rubies are gemstones and do not have a scent. They are composed of minerals such as corundum which do not emit any distinct odor. So, rubies do not have a smell.
Yes, Pseudomonas bacteria can emit a distinct smell, often described as a sweet or fruity odor.
Diamonds are formed from carbon, and in this state, possess no taste or smell.
Emit. ex: Cheese tends to emit a smell.
Certain moths and other insects emit a smell similar to a moth ball. If you smell this in your home it probably means you have an insect infestation.