Patent ID: 11953458
Assignee: ECOLAB USA INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 18:
19. A system comprising:
a first resistance temperature detector (RTD), the first RTD having a first coating;
a power source in communication with the first RTD and being configured to provide electrical power to the first RTD; and
a controller in communication with the first RTD and the power source and being configured to:
cause the power source to provide electrical power to the first RTD;
stop applying electrical power to the first RTD:
measure the temperature of the first RTD over time after stopping applying the electrical power to the first RTD;
measure a thermal characteristic of the first RTD based on the measured temperature over time;
determine one or more characteristics of a fluid in contact with the first RTD based on the measured thermal characteristic of the first RTD; and
perform a corrective action in response to the one or more determined characteristics; and wherein

first coating comprises a swellable polymer; and
determining one or more characteristics of the fluid comprises determining a concentration of a constituent in the fluid that is absorbable by the swellable polymer.