초록 ▼

A fluid flow sampler having a peristaltic pump which periodically draws a sample volume of effluent from a sewer main through a supply line to a collecting chamber wherein the pH is recorded after which the sampled effluent is transferred to an agitated and cooled holding chamber. The supply lines a

A fluid flow sampler having a peristaltic pump which periodically draws a sample volume of effluent from a sewer main through a supply line to a collecting chamber wherein the pH is recorded after which the sampled effluent is transferred to an agitated and cooled holding chamber. The supply lines are valve controlled to delay delivery to the collecting chamber until steady state conditions are achieved in the supply line. The supply lines are air purged when the pump is not operating and lines are underground which are connected to a sampler inside a building thereby eliminating line freezing. The entire operation of obtaining, holding and maintaining the representative samples is programable and completely automatic.

대표청구항 ▼

A fluid flow sampler for obtaining a fluid sample from a source, comprising: first vessel means; a liquid level sensing means projecting into said first vessel means; pump means having an inlet and an outlet; an electrical switch operatively connected to said pump means for energizing and deenergizi

A fluid flow sampler for obtaining a fluid sample from a source, comprising: first vessel means; a liquid level sensing means projecting into said first vessel means; pump means having an inlet and an outlet; an electrical switch operatively connected to said pump means for energizing and deenergizing said pump means; an inlet line fluidly connecting the source with the inlet of said pump means; an outlet line fluidly connecting the outlet of said pump means with said first vessel means; first valve means in said outlet line having a first position blocking fluid flow to said first vessel means and a second position permitting fluid flow through said outlet line to said first vessel means; a branch line associated with said first valve means and fluidly connected with said outlet line when said first valve means are in said first position; control means operatively connected to said liquid level sensing means and said electrical switch for energizing said pump means with said first valve means in said first position and maintaining said pump means energized when said valve means is in said second position until a predetermined amount of fluid sample enters said vessel means during a predetermined time and for thereafter denergizing said pump means; and a second vessel means fluidly connected to said first vessel means by a first conduit, and second valve means fluidly connected in said first conduit and operated by said control means for permitting fluid flow from said first vessel means after said predetermined amount of fluid sample has been delivered to said first vessel means during said predetermined time.