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UnderWater Meter System

UnderWater Meter

Versatile amplifier and data logger system for field and underwater applications

The Unisense UnderWater Meter is a high quality research tool that allows you to apply microsensor technology in the field. The robust UnderWater Meter can be used in humid rain forests, wetlands or operated by scuba divers underwater on coral reefs, in sea grass beds or muddy estuaries.

  • Waterproof to 30 m
  • Easy to operate using magnetic keys
  • Modular system with four channels for use with all Unisense sensors
  • Read directly from large and brigth LED display and log data
  • Digital outputs for data extraction
  • Analog output for external data acquisition

In situ Amplifiers

The delicate microsensor signal is amplified by the Unisense In Situ Amplifier (ISA); these function as miniaturized pA or mV meters facilitating polarization of the microsensor. The ISAs ensure high quality signal with extremely low background noise, and are specific for each type of microsensor. All four channels of the UnderWater Meter can therefore be connected to any ISA and the amplifiers can easily be interchanged between channels. This gives you full flexibility and allows you to design an UnderWater Meter system that meets your study requirements

Logging Unit

Microsensor data are automatically saved in the logging unit. USB output gives you easy upload of data to a PC after deployment alternatively data can be monitored online and in real time on a PC using the optional analog output cable together with an A/D converter.

Complete UnderWater Meter System

When used for microscale measurements in the field, the microsensors should be mounted in a micromanipulator (MM33) on a stable stand (IS19). For measurements in incubation bottles or bulk water, the sensors can be held by hand or mounted in a frame structure. The unisense UnderWater Meter System with accessories is an excellent choice for field studies giving you flexibility and a world of possibilities.

Ordering information

System components
UnderWater Meter (4-channels)
All Unisense Sensors and Electrodes
In Situ Amplifiers
Sensor connectors
In Situ Connectors
MM33 or MM33-2 (Single or double head)
IS19 in situ micromanipulator stand
Calibration chamber
Optional battery
Field Battery Package

UnderWater Meter specfications

Technical information

View specifications

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Sensors and Electrodes
Diving Diving in Greenland with the UnderWater Meter System

Diving in Greenland with the UnderWater Meter System

The Ikka Fjord in Greenland houses unique microbial communities. A Danish research team used the UnderWater Meter System to study this spectacular habitat.
Photographer: Jesper Kikkenborg

Read more

Johnson, C. R. et al (2018), Hypersalinity as a trigger of seagrass (Thalassia testudinum) die-off events in Florida Bay: Evidence based on shoot meristem O2 and H2S dynamics, Journal of Experimental Marine Biology and Ecology, 47 - 52, vol. 504 Read abstract

Mackey, T. J. et al (2018), Stromatolite records of environmental change in perennially ice-covered Lake Joyce, McMurdo Dry Valleys, Antarctica, Biogeochemistry, 73 - 92, vol. 137 Read abstract

Pedersen, Ole et al (2011), In situ O2 dynamics in submerged Isoetes australis: Varied leaf gas permeability influences underwater photosynthesis and internal O2, Journal of Experimental Botany, 4691 - 4700, vol. 62 Read abstract

Vopel, Kay et al (2011), Cues, Not an Endogenous Rhythm, Control the Dusk Peak in Water-Column Entry by Benthic Copepods, Estuaries and Coasts, 1194 - 1204, vol. 34 Read abstract

See all publications
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