Aqua TROLL 500 Multiparameter Sonde

Aqua TROLL 500 Multiparameter Sonde

Availability: In stock

Code: RB_AT500
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Whether you’re spot checking a tank or conducting long-term monitoring at remote sites, the Aqua TROLL 500 has you covered. This cost-effective multiprobe enables wireless data collection when used as a handheld, plus easy integration with control systems and telemetry for long-term installation. With interchangeable sensors, the Aqua TROLL 500 replaces multiple instruments and saves time in the field to reduce overall monitoring costs. Highly stable sensors need minimal maintenance and calibration, giving you confidence in your data. Just plug the sonde into a battery pack, datalogger, control system or telemetry and you’re ready to go!

The Aqua TROLL 500 fits a wide variety of applications, including:

  • Surface water spot sampling and profiling
  • Remote monitoring via telemetry
  • Long-term drinking water, wastewater or stormwater monitoring
  • Aquaculture
  • Groundwater sampling 


  • Base sensor configuration includes: RDO Optical Dissolved Oxygen, pH/ORP, Turbidity, Conductivity, Temperature and Pressure.
  • Ammonium, chloride, and nitrate Ion-Selective Electrode (ISE) available
  • Interchangeable sensors, wet-mateable
  • Sub 2” antifouling wiper (included) cleans all sensors for higher quality data in long-term deployments
  • Wireless Mobile Bluetooth® connection for Android (VuSitu app), and Win-Situ 5 for PC laptop
  • Site tagging and GPS coordinates functions available via mobile app
  • LCD display gives a snapshot of instruments health and wireless connectivity
  • Wide sensor range for performance in a variety of applications
  • Automatic environmental compensation eliminates data post-processing
  • Easy integration with PLC/SCADA control systems, data loggers, and telemetry—no adapters or confusing proprietary communication protocols
  • Redesigned pH and ISE reference for 3X sensor stability
  • Corrosion-resistant housing and abrasion-resistant RDO foils
  • Compatible with the Low-Flow system (sold separately)


  • Reduces monitoring costs: The Aqua TROLL 500 adapts to monitoring needs without extra field equipment. With ultra-stable sensors that minimize calibration and maintenance needs, the multiprobe reduces total cost of ownership.
  • Saves hours on fieldwork: VuSitu (Android)  mobile app records data directly from the probe for spot checks or low-flow sampling. Telemetry integration with HydroVu platform provides real-time access to remote monitoring data without having to download data in the field.
  • Delivers higher quality data: Drift-resistant sensors with simplified calibration provide accurate, reliable data—no messy field notebooks required. When using the instrument as a handheld, our mobile app walks you through SOPs to minimize errors. Rugged design with unique antifouling wiper ensures performance in harsh environments for longer deployments.
  • Ease of use: Streamlined data collection and automatic environmental compensation mean zero post-processing, while our mobile app lets you tag sites and track GPS coordinates. The probe easily integrates with control systems and telemetry, as well as our online HydroVu data management platform for remote monitoring.
  • 24/7 Support: Get free tech support and help with your application anytime, even in the field. U.S. customers also get a 7-day turnaround on maintenance.


Operating Temperature (nonfreezing) | -5 to 50°C (23 to 122°F)ISE: Ammonium & Nitrate 0 to 40°C ; Chloride 0 to 50°C

Dimensions | 4.7 cm (1.85 in.) OD x 60.2 cm (23.7 in.) (includes connector) With bail: 72.9 cm (28.7 in.)

Wetted Materials (SONDE AND SENSORS) | PC, PC alloy, Delrin, Santoprene, Inconel, Viton, Titanium, Platinum, Ceramic, Nylon, PVC, Graphite

Output Options | RS-485/MODBUS, SDI-12, Bluetooth®

8-36 VDC; Required for normal operation
Sleep: < 0.2 mA typical; Measurement: 40 mA typical, 75 mA Max

Reading Rates | 1 reading every 2 seconds

LCD Display | Integrated display shows status of sonde, sensor ports, power voltage and connectivity, enable/disable BT.

Software | Android™: VuSitu through Google Play™, Windows®: Win-Situ 5, Data Services: HydroVu

Available Sensors


Barometric Pressure (VENTED MODELS ONLY)




TDS (derived from conductivity and temp)

Salinity (derived from conductivity and temp)

Rugged Dissolved Oxygen (RDO) with RDO-X


TSS (derived from turbidity)





Aqua TROLL 500 Multiparameter Sonde spec sheet


  1. Aqua TROLL 500 multiparameter sonde configured to your specific application
  2. Sensor installation tools
  3. Maintenance supplies
  4. NIST Factory Calibration Report for guaranteed accuracy
  5. WinSitu 5 Software, User Manual, and Quick Start Guide
  6. Cable with small desiccant (cable length varies based on chosen configuration) – Every cable includes patented twist-lock connectors and Kellems grip.
  7. Your selection of device communication option(s).