Portable DO Tracer:

The Tracer PockeTester offers direct reading of Conductivity, Total Dissolved Solids, Salinity, and Temperature with one electrode.


  • Oxygen level displayed as % Saturation from 0 to 200.0% or Concentration from 0 to 20.00 ppm (mg/L)
  • Adjustable Altitude Compensation (0-20,000 ft in 1,000 ft increments)
  • Adjustable Salinity Compensation from 0 to 50 ppt
  • Memory stores up to 25 data sets with DO and Temperature reading
  • Self-calibration on power up; Data Hold, Auto power off, Low battery indicator
  • Optional 3 ft (1m) or 16 ft (5m) extension cable
  • Complete with DO electrode, protective sensor cap, spare membrane cap, electrolyte, four 1.5V SR44W batteries, and 48" (1.2m) neckstrap

RDO Optical Dissolved Oxygen sensor:

The RDO® Rugged Dissolved Oxygen Sensors offer significant improvement over Clark cell and existing optical dissolved oxygen sensors.

Rugged Performance

  • No hydration effects
  • No conditioning required
  • Not subject to thermal shocking
  • Few interferences
  • No photobleaching
  • Withstands abrasion