gas detection cathrometers
hydrogen sulphide...
Helium is generally used; special spectrometers to detect helium leakage are designed.
Helium is used to detect leaks.
Ethanethiol is commonly used as an odorant in LPG to detect leaks.
flux meter
NO, you cannot at present use a hydrocarbon gas detector which generally use IR absorption technology to detect hydrogen.
The main technology that is being used to detect microbursts is Doppler radar. Another one called LIDAR is also growing in popularity.
Technology can be used to detect diseases before they get too serious.
Eyes. Human eyes.
GUI (Graphical User Interface)?
Not sure about chemical? But there are highly sensitivity alarm metres for detecting the leakage of liquid petroleum gas (LPG, butane, propane etc), and natural gas. One method I once used to find a leaking joint on a gas cooker was to apply washing-up liquid round the joints until a joint bubbling up pin-pointed the leak.
Public hotlines, fire lookouts in towers, and ground and aerial patrols can be used as a means of early detection of forest fires