PORTABLE GAS ANALYSER Russian patent published in 2010 - IPC G01N27/12 

FIELD: electricity.

SUBSTANCE: portable gas analyser based on one or several piezosensors includes detection cell with nozzles, inside of which there are piezosensors are arranged with sensitive film coatings to register components of gas mixture, device for excitation of oscillations and registration of piezosensor signals. Cell is arranged in the form of cylinder with one cover, on which holders for piezosensor (piezosensors) are arranged, miniature excitation circuit and frequency metre, actuated autonomously from inbuilt element of supply. All parts of gas analyser are connected in one miniature casing, on upper panel of which there is cover of detection cell with holders, digital panel, light indicator of device availability for operation rigidly fixed. One of side panels contains start button and input for charging device, casing holds miniature excitation circuit connected to microprocessor for registration and conversion of piezosensor signal and its transmission to digital panel, replaceable accumulators or other elements of supply. Detection cell and cover are made of fluoroplastic, which makes it possible to provide for tight connection of cover and detection cell without thread and tightness in measurements.

EFFECT: increased mobility, portability of device, reduced level of noise, expansion of capabilities in express test of air or mixtures of gases, balanced gas phases of solid, liquid samples, to determine concentrations of gases, being markers of quality, safety of food, non-food products and diseases with the purpose of express test.

1 tbl, 1 dwg