FIELD: hydraulic excavation. SUBSTANCE: device includes vertically mounted on pulp feed line tank 3 with separating diaphragm 4, connecting pulse tube 5 inclined towards tank, and pressure gage 8. Separating diaphragm 4 is made rigid with center hole having diameter equal to, or less than 0.1 of tank diameter. Pressure gage 8 is connected to pulse tube through rubber tube 6 with clamp 7 for adjustable pinching. Tank holding capacity-to-pulse tube holding capacity ratio exceeds compression pressure of cutoff air in tank 3. EFFECT: higher accuracy of measurement and reliable protection of pressure gage from pressure surging. 2 dwg
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