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What is a multiparameter water quality logger?

A multiparameter water quality logger is a single instrument that records several water-quality measurements at once, on the same schedule, to the same dataset, instead of running a separate single-parameter logger for each one. Deploy it once and recover one file covering everything it measures.

What "multiparameter" typically covers​

Different instruments combine different sets of parameters. Common ones across the industry include:

  • Physical parameters: temperature, turbidity, light, current speed and direction.
  • Chemical parameters: conductivity/salinity, dissolved oxygen, pH.
  • Biological proxies: chlorophyll-a (a proxy for algal biomass).

No single instrument measures everything, and the right combination depends on what a site actually needs to track. A full water-chemistry sonde with conductivity, dissolved oxygen and pH is a different, typically more expensive instrument class than a physical-environment logger tracking temperature, turbidity, light and current, see sonde vs CTD.

Why use one instrument instead of several​

  • One deployment, one dataset. A single mooring point and a single CSV instead of reconciling timestamps and depths across multiple loggers.
  • Lower total hardware cost than buying a separate logger per parameter, since a chassis, battery, memory and housing are shared.
  • Less field time. One instrument to deploy, service and recover instead of several.

The tradeoff is that a combined instrument fixes which parameters travel together. If a site only ever needs one parameter, a dedicated single-parameter logger can still be the simpler choice.

An example: GrowProbe​

PEBL's GrowProbe is a multiparameter logger covering the physical-environment side: turbidity, temperature, light, current speed and current direction, in one 50 m-rated device. It does not measure conductivity, dissolved oxygen, pH or chlorophyll, see the full specification and the pricing FAQ for how it compares to full water-chemistry sondes.

Need help?​

Get in touch at hello@pebl-cic.co.uk.