US 11,940,297 B2
Very low power contaminant detection circuit
Randy John Williams, Sandy, UT (US)
Assigned to Aclara Technologies LLC, St. Louis, MO (US)
Filed by ACLARA TECHNOLOGIES LLC, St. Louis, MO (US)
Filed on Dec. 17, 2019, as Appl. No. 16/717,550.
Claims priority of provisional application 62/781,114, filed on Dec. 18, 2018.
Prior Publication US 2020/0191605 A1, Jun. 18, 2020
Int. Cl. G01D 3/036 (2006.01); G01D 4/00 (2006.01); H05K 1/16 (2006.01)
CPC G01D 3/0365 (2013.01) [G01D 4/002 (2013.01); H05K 1/167 (2013.01); H05K 2201/10196 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A meter transmission unit comprising:
a housing sealed to external conditions;
metering circuitry enclosed within the housing configured to transmit data between one or more utility meters and a utility provider; and
a contaminant detector for detecting a contaminant within the housing, the contaminant detector generating a signal indicative of the detected contaminant.