Timothy R Nygaard

US Patent:

20200063321, Feb 27, 2020

Filed:

Aug 27, 2019

Appl. No.:

16/552767

Inventors:

- Saint Paul MN, US
Jason Gregory Lang - Bloomington MN, US
Timothy Charles Nygaard - Hammond WI, US

International Classification:

D06F 39/00
G01N 1/14
G01N 33/18
D06F 39/02

Abstract:

A filtration-free liquid sampling system may be used to extract particulate or debris-containing liquid samples that may otherwise plug a filter over its service life. For example, such a system may be used to extract liquid sample from an industrial textile washer to monitor and/or validate the quality of wash conditions within the washer. In some examples, the system includes a pump that creates a vacuum on a backstroke, drawing liquid into a sensor housing positioned between the pump and the washer. After holding the liquid in the sensor housing long enough to measure its properties, the pump can be driven in a reverse stroke to pressurize the contents in the sensor housing and force the liquid back into the washer. This vacuum fill/pressure purge can keep the sensor housing free of debris.