A psychrometer is a type of hygrometer and is used exclusively to determine the relative humidity or moisture content in the air. Psychrometers represent an older humidity measurement form and electronic sensors that depend on changes in electrical resistance and capacitance rather than condensation temperature have widely replaced them.

Ozone or O3, is a molecule similar to oxygen that is made up of three oxygen atoms.

Seismic waves are shock waves that occur underneath or through the Earth’s surface. Volcanic eruptions, explosions, wind, or strong ocean waves generate them. Depending on the nature and strength of the seismic wave, it can significantly damage the Earth’s surface or generate tsunami waves that can wreak havoc on the coastline.

The Coriolis effect is the tendency for a moving body that is on or above the Earth’s surface to drift sideways from its intended course due to the Earth’s rotation. The direction of drift is to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.

Anemometers are meteorological devices that measure wind velocity and pressure. They are normally found in weather stations, but are also used on ships, oil rigs, at airports, and for personal purposes. The devices derive their name from the Greek word “anemos,” which means wind.

An air exchanger is a device that transfers stale air from inside a home to outside, and fresh air from outside to the inside. Air exchangers are often large and built directly into a home’s foundation in order to provide maximum fresh air levels at all times.

An air scrubber is a device that removes particles, gases, or chemicals from the air in a specific area. Air scrubbers are very important in some industries as workers are frequently exposed to harmful substances.

An ionic air purifier is a device that uses an air ionizer to filter dust, smoke, and other harmful particles from the air. An ion is an electrically charged molecule that can either have a negative or positive charge. Positively charged ions have one or more less electrons, while negatively charged ions have one or more extra electrons.

A solar pool heater is a device that uses the sun’s power to heat a pool. Solar pool heaters are ergonomically designed to absorb the maximum amount of sunlight without imposing on the user’s comfort. Solar pool heaters allow the user to change the water temperature without even getting out of the pool.

A hot water circulator (circulator pump) is a device that circulates hot water through a house’s pipes so that hot water is always instantly available. In traditional one-way plumbing systems, water is run through a hot water heater and directed through the pipes towards the taps whenever a tap is turned on.