CPC G01N 35/1002 (2013.01) [B01L 3/52 (2013.01); F04B 49/065 (2013.01); F04B 49/22 (2013.01); G01N 35/1004 (2013.01); B01L 2200/082 (2013.01); B01L 2200/16 (2013.01); B01L 2300/0627 (2013.01); B01L 2300/0858 (2013.01); B01L 2400/0475 (2013.01); B01L 2400/049 (2013.01); B01L 2400/06 (2013.01); G01N 2035/00277 (2013.01)] | 13 Claims |
1. A reagent trough comprising:
a vessel comprising a bottom and sidewalls;
a high-level liquid sensor;
a low-level liquid sensor positioned to detect liquid at a lower level than the high-level liquid sensor;
a first liquid port positioned lower than the high-level liquid sensor;
a second liquid port positioned lower than the first liquid port; and
a pump system comprising a first liquid supply port and a second liquid supply port;
wherein the first liquid port is fluidly connected to the second liquid supply port of the pump system and the second liquid port is fluidly connected to the first liquid supply port of the pump system.
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