Useful measurements can include rainfall, water level, water temperature, pH, conductivity, and dissolved oxygen. Select parameters, instruments, and monitoring locations based on your study objectives, site conditions, and the changes you need to understand.

A stand-alone logger stores measurements locally for retrieval during field visits through a supported Bluetooth, optical, or other connection. A compatible remote station uploads measurements so you can review them between visits. Cellular RX stations require suitable power, cellular coverage, and an RX data plan.

Yes. Water level can be converted to flow using a site-specific stage–discharge rating curve or an appropriate weir or flume relationship. Establish and validate the relationship for your site; water level alone is not a direct flow measurement.

For suitable third-party flow meters with a compatible pulse output, HOBO pulse-input adapters can also record pulses. Match the meter output, adapter, and logger or station configuration, then apply the appropriate pulse scaling to calculate flow rate and accumulated volume.

A pH logger measures acidity or alkalinity; it does not identify individual pollutants. Changes in pH can provide useful context for an investigation, but identifying specific substances requires appropriate sampling, analysis, or additional instruments.