Dual Chemistry Nitrate Phosphate Sensor

In Situ Automated Nitrate Detection

Dartmouth Ocean Technologies introduces the Dual Chemistry Nitrate & Phosphate Sensor, a miniaturized, autonomous sensor for marine environments designed as a cost effective solution to real-time, “hands-free” measurement of nitrate & phosphate (NP) concentrations.

Features at a Glance:

  • Lab-on-Chip (LOC): Microfluidic wet chemistry sensor featuring patented and proprietary “Inlaid Optical Cell
  • Provides expanded insights into the water sample chemistry not available from a single chemical analysis
  • Reduces reagent consumption, decreases reaction time, and reduces power draw
  • Self-Powered and self-logging for real time measurement (data streaming available)
  • Technology Flexibility: An excellent contender for towed systems, un-crewed vehicles, gliders, ROVs, Voluntary Observation Ships, buoys, and profiling floats
  • Customizable and configurable to fit into most platforms

*U.S. Patent 11,231,356 B2


  • Nitrate & Phosphate Sensor
  • Rigid Reagent Housing
  • Self-Contained
  • 275 samples / 25 standards per reagent load*
  • Programmable sample interval & range
  • Easy transport and deployment
  • Flexible mounting configurations


  • Optional power from platform or battery pack
  • Dual- and Tri-case mounting brackets


Dual Chemistry Nitrate Phosphate Sensor
Autonomous Installation With Battery
Transportable Autonomous Installation With Battery
Dual Chemistry NP Sensor on Stella Maris MSSP