US 12,422,391 B2
Ruggedized sensor for detecting organic liquids
Wesley Dong, Belmont, CA (US); Jennifer Robison, Kelowna (CA); Emmi Ngo, Santa Rosa, CA (US); Peter Wijeratne, San Carlos, CA (US); and Johnny Lam, San Mateo, CA (US)
Assigned to Chemelex Europe GmbH, Schaffhausen (CH)
Filed by nVENT Services GmbH, Schaffhausen (CH)
Filed on Aug. 27, 2020, as Appl. No. 17/005,094.
Claims priority of provisional application 62/895,790, filed on Sep. 4, 2019.
Claims priority of provisional application 62/892,441, filed on Aug. 27, 2019.
Prior Publication US 2021/0063337 A1, Mar. 4, 2021
Int. Cl. G01N 27/07 (2006.01); G01N 27/04 (2006.01); G01N 33/28 (2006.01)
CPC G01N 27/07 (2013.01) [G01N 27/045 (2013.01); G01N 33/28 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An organic liquid sensor configured to output a signal corresponding to the presence of one or more organic liquids and comprising:
a circuit board;
an electronic monitoring circuit mounted on a first end of the circuit board, wherein the circuit board comprises a nonconductive surface that extends from the electronic monitoring circuit to a second, opposite end of the circuit board; and
a sensor film deposited on the nonconductive surface of the circuit board, the sensor film comprising a first length on a first side of the circuit board, a second length on the first side of the circuit board, and a bridge portion on the first side of the circuit board, the first length and the second length being electrically and physically separated by a gap extending through an entire thickness of the circuit board and the bridge portion being electrically coupled to the first length and the second length, wherein the first length, the second length, and the bridge portion comprise the same material and are deposited on the nonconductive surface,
wherein at least a portion of the nonconductive surface of the circuit board is etched to improve adhesion of the sensor film onto the circuit board,
wherein the electronic monitoring circuit is configured to detect a resistance of the sensor film.