AIR SAMPLER Russian patent published in 1995 - IPC

FIELD: air sampling. SUBSTANCE: air sampler has pressure difference stabilizer and by-pass line which are disposed at output of diaphragm. The by-pass line connects output and input of discharge agitator. Variable pneumatic resistance is mounted in by-pass line. Input of by-pass line and input of diaphragm are connected with output of discharge agitator. Device is provided with valve mounted in basic line. Input of the valve is connected with output of pressure difference stabilizer. Output of the valve is connected with atmosphere. Device has set of valves with diaphragms and pressure difference stabilizers mounted on them. Set of valves is mounted onto branches which are parallel one to another and connected with the basic line. Pressure difference stabilizer is mounted at each branch at output of the diaphragms. Input of the valve is disposed at output of pressure difference stabilizer. Output of the valve is connected with atmosphere. EFFECT: improved accuracy; improved reliability. 3 cl, 1 dwg