Determination Of Air Movement Speed, Air Humidity Or Air Temperature In Residential And Industrial Premises; Determining The Level Of Illumination, Brightness Or Gloss Of The Surface; Determining The Content Of Carbon Oxide (Iv) In The Air By The Electrochemical Method Using Portable Gas Analyzers; Determination Of The Formaldehyde Content In The Air By The Photometric Method (With Acetylacetone); Measuring The Volumetric Activity Of Radon-222 In The Air Of Buildings And Structures Using The Alphaguard Df2000 Radon Monitor; Measurement Of The Power Level Of The Absorbed Dose Of External Gamma Radiation At One Point; Selection Of Samples (Samples) For Laboratory Research; Preparation Of A Conclusion Based On The Results Of Research/Measurements (Without Taking Into Account The Cost Of Research/Measurements)