Reduce Maintenance Time and Tasks

  • Use robust, low-maintenance RDO Sensor in any aquaculture setting.
  • Quickly disinfect the handheld to maintain biosecurity
  • Get long-lasting calibrations and reliable data—When you need to calibrate the sensors, the sensors automatically recognize calibration solutions and calibration data is stored in the sensors.
  • Stay up-to-date with automatic iSitu App updates.
  • Purchase individual parts and solutions at the In-Situ e-store with your smartphone. 

Reduce Total Cost of Ownership

  • Eliminate expensive, proprietary handheld meters and test kits. Your iOS device now doubles as your handheld meter.
  • Using smarTROLL™ Multiparameter Handheld and need a dedicated DO probe? The smarTROLL Battery Pack and smarTROLL Cable work with both handhelds. 


  • Aquariums
  • Freshwater and saltwater production
  • Hatchery operations
  • Open pen production systems
  • Raceways
  • Recirculating, partial reuse, and flow-through systems








New smarTROLL™ RDO® Handheld

The Future of DO Spot Checking The smarTROLL RDO Handheld combines optical dissolved oxygen (DO) sensor technology with revolutionary smartphone mobility. The intuitive iSitu® Application eliminates training time and runs on your iPhone®, iPod touch®, or iPad® device.

The smarTROLL RDO Handheld simultaneously measures four parameters:

  • Dissolved oxygen with the optical RDO Sensor
  • Barometric pressure
  • Air temperature
  • Water temperature

Simply connect the smarTROLL RDO Handheld to a battery pack, launch the iSitu App, and start reading results. No warm-up time or tedious setup. The iSitu App guides you through spot checks, calibrations, and data management.

Mitigate Risks with Fast Spot Checks

  • Easily check DO—The intuitive smartphone application displays results instantly so that you can respond quickly to changing conditions.
  • Consistently control water quality and optimize growing conditions with routine spot checks.
  • Use the smarTROLL Handheld to quickly check the performance of life support systems. 

Get Instant Results

  • Track every tank/pond with one device—The iSitu App stores site details, including photos and GPS coordinates. Recognize sites quickly.
  • Instantly report pond or tank conditions—Send a snapshot of real-time data to coworkers from your smartphone. You can also log data to your smartphone and email data logs in a spreadsheet.
  • Work from anywhere—Use wired or wireless connection.












Key Specifications

Durable design: Acetal, Titanium, 316 stainless steel, Viton®, PC/PMMA

Parameters: Dissolved oxygen, barometric pressure, air temperature, water temperature

Viton is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates.

Accurate Readings

  • Barometric pressure (battery pack): ±3 mbar
  • Dissolved Oxygen: ±0.1mg/L; ±0.2mg/L; ±10% of reading
  • Temperature, water (probe): ±0.1° C
  • Temperature, air (battery pack): ±2° C






smarTROLL RDO® Handheld

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