Water quality professionals use Aqua TROLL^® and TROLL^® 9500 instruments for spot checking and long-term monitoring. Field-ready equipment offers excellent power management for extended deployments. Instruments measure and log conductivity, dissolved oxygen, pH/ORP, turbidity, and more.

Lake and Reservoir Profiling

Use the TROLL 9500 instrument with integrated pressure sensor and user-selected water quality sensors to automatically tag readings with date/time as the instrument is deployed through the water column.

Stream and River Monitoring

Set instruments to log data at specified time intervals or water quality conditions change. Integrate instruments with external samplers or telemetry platforms.

Cave Pool Monitoring

Use the TROLL 9500 as scientist David B. Levy did to monitor water quality.

Article: An Investigation of Meromixis in Cave Pools, Lechuguilla Cave, New Mexico by David B. Levy, International Journal of Speleology, Vol. 37, No. 2, July 2008 (pdf)

"The TROLL 9500 units are easy to calibrate, and we don't have to recalibrate as often as some of our other instruments. So far the TROLL 9500s have been really reliable, and they were easy to integrate with the ISCO 6712 samplers." – Mike Piehler, researcher at the University of North Carolina

Stormwater Outfall Monitoring

Identify sources and patterns of pollution loading.

Application Note: Stormwater Outfall Study in North Carolina Assesses Impacts of Discharge to Coastal Ecosystem (pdf)

Technical Note: Using In-Situ Instruments with an ISCO Sampler (pdf)

Road Salt Runoff

Track environmental impacts of chloride runoff on streams, rivers, and aquifers with Aqua TROLL 100 and 200 instruments.

Application Note: Aqua TROLL 200 Instrument Aids Road Salt Reduction Efforts (pdf)