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pH sensor replacement with fDOM sensors for water quality monitoring

PH Sensors, Solicitation 51178, issued by Pierce County.

At a glance

Pierce County Solid Waste Management needs to replace pH sensors with fDOM (fluorescent dissolved organic matter) sensors on existing In-Situ Aquatroll 500 water quality monitoring devices. The replacement sensors will enable more accurate measurement of dissolved organic carbon and support turbidity analysis work.

Key facts

Issuing agency
Pierce County
Solicitation number
51178
Type
purchase
Posted
Jun 21, 2023
Response deadline
Jun 28, 2023, 7:00 PM EDT
Place of performance
Pierce County, WA
  • water quality
  • sensors
  • environmental monitoring
  • equipment replacement
  • fdom

Official description

Solicitation #2023-PE-297. Issued by Procurement and Contract Division. SWM needs to swap out the pH sensors on the Division's In-Situ Aquatroll 500 water quality sondes and replace them with fDOM sensors. fDOM is the fraction of CDOM that fluoresces. CDOM stands for Chromophoric Dissolved Organic Matter or Colored Dissolved Organic Matter. Both terms mean a quantitative measurement of the concentration of decaying organic material detectable in the water column, (i.e., tannins, humic acids, and other forms of dissolved organic carbon (DOC)). fDOM is the fraction of CDOM that can be more accurately measured. And knowing the fDOM value (number) will provide for a more precise computation of CDOM and DOC, which are very useful datasets for us to have when conducting turbidity analysis.

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