When it comes to helium, it may not be familiar, but when it comes to "hydrogen balloon," it's different. In fact, the correct name for a hydrogen balloon should be called "helium balloon," which is also filled with helium. People still refer to it as "hydrogen balloon" just out of habit.

Helium, also known as a rare gas, is very rare, accounting for only about 0.0005% of the volume of air. Due to its light weight, helium can easily escape into the atmosphere and cannot be reused by humans. Therefore, it is also classified as a non renewable resource.

Helium is also an inert gas with very stable chemical properties. It is neither easily soluble in water nor rarely reacts with other elements. We often hear the term "hydride", but there has never been a term for "helium". Stability gives it many uses that hydrogen cannot do.

Pressure reducing agent

Helium is used to add to oxygen tanks as a pressure reducing agent. "Divers are exposed to much greater pressure in the sea than on land, and are prone to symptoms of dizziness and difficulty breathing. At this time, if they inhale oxygen with strong density and pressure from an oxygen bottle, it can pose great danger to the human body.". Mixing helium and oxygen reduces the pressure inside the oxygen tank, creating a suitable gas density, allowing divers to easily inhale oxygen and avoid the occurrence of "decompression sickness.".

Nuclear magnetic resonance

Helium is also the gas with the lowest boiling point, reaching - 268.93 ℃ below zero. It only becomes liquid when extremely close to absolute zero (- 273.15 ℃ below zero) and does not solidify.

Medical nuclear magnetic resonance requires the refrigeration function of helium. Superconductor imaging is required in nuclear magnetic resonance imaging, which requires extremely low temperatures to achieve a resistance of 0. Simply put, it is necessary to surround the superconductor with cooled liquid helium to allow electric current to pass through the superconductor, creating a strong magnetic field, in order to obtain high-resolution images of internal organs.

Rocket launching

Another important area of helium refrigeration is aerospace.

Helium can cool, purge, and seal raw materials for precision welding to prevent oxidation reactions at the welding site; On rockets, helium can also be used to manipulate various pneumatic valves and components; During aircraft flight or landing, it is also necessary to use helium as the airtight agent for the liquid system.

Like in hospitals and balloon manufacturing factories, helium is indispensable, so what should we do if there is a leak?

One is that we can use a helium mass spectrometer leak detector, and the other is that we can choose a gas detector to detect.

Whether fixed or portable, we can use corresponding sensors to sense the presence of gases, conduct 24-hour online monitoring, and provide multiple signal outputs. A complete set of controllers can be used to achieve real-time and wireless data transmission.

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