Waste water sampling system

Details Waste water sampling system Waste water sampling system

1976-01-19

1977-05-24

Swisher, S. Clement

Measuring and testing

Measuring vessel

73421B, G01N 114

Patent

active

040247660

ABSTRACT:
A liquid sampler including a force main sampling chamber, a seal leg having an end portion immersed in liquid in said sampling chamber, a dam in the sampling chamber for maintaining the liquid at a predetermined minimum elevation therein, a draw tube in communication with the seal leg, a pump for supplying either compressed air or vacuum to the draw tube, first control means for causing the pump to supply vacuum to the draw tube only when a sample is to be taken, a side arm in the draw tube for receiving liquid, second control means including non-contact liquid-level sensing means in the draw tube for causing the pump to supply pressure rather than vacuum after the liquid reaches a predetermined level in the draw tube, and circuit means for terminating operation of the sampling cycle in the event a sample is not taken within a predetermined time period after the sampling cycle is initiated.

REFERENCES:
patent: 3771336 (1973-11-01), Thulin
patent: 3811324 (1974-05-01), Doncer
patent: 3901087 (1975-08-01), Fabritus

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