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In Situ Amplifier and Connector System


Robust sensor signals and ease-of-use

The Unisense In Situ Amplifiers are built to give signal amplification close to the sensor tip for stable and low noise signal path. The In Situ Connectors are allowing easy sensor replacement during field work.
The In Situ Amplifier and Connector System is an integrated part of our Field Systems portfolio including MiniProfiler MP4, UnderWater Meter and our DeepSea Lander solutions.

  • Rated to 300m depth – optional to 6000m
  • High quality and robust signal amplification
  • Easy sensor replacement during field work
The In Situ Amplifier is specifically designed to a single type of Unisense microsensors. 
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In Situ Amplifiers

Microsensors are sensitive and extremely accurate measuring tools. To avoid that the minute sensor signals (pA or mV) are influenced by background noise, the Unisense In Situ Amplifiers (ISA) are integrated in the cable connecting the sensor to the datalogger and convert the sensor signal to a robust voltage signal already at the microsensor base. The ISAs thus function as miniaturized pA- or mV-meters and ensure high quality signals.

The ISAs are sensor type specific and facilitate polarization of the sensor and amplification of the signal. All channels of your Field System can therefore be connected to any ISA. Amplifiers can easily be interchanged, both within and between instruments, giving you total flexibility for future studies.

In Situ Connectors

The Unisense In Situ Connector system is designed for mounting of sensor on the ISA and for easy replacement of sensors while in the field.

  • Simple snap-on mounting
  • Protection of sensor tip during handling and preparation
  • Improved shielding for very stable signals both in the lab and in the field
  • Providing pressure compensation at all depths

Unisense Depth Rating Shallow Water DeepSea
Sensors 0-50 meters depth Deeper than 50 meters
Electronics and Amplifiers 0-300 meters depth Deeper than 300 meters

Sensors to be used deeper than 50 meters depth will be pressure compensated.

Ordering information


In Situ Amp (S)

In Situ Amp (D)
Shallow water or DeepSea in situ amplifiers.
Please specify:
ISA-O2 (Oxygen sensors)
ISA-H2S (Hydrogen sulfide sensors)
ISA-H2 (Hydrogen sensors)
ISA-N2O (Nitrous oxide sensors)
ISA-Pot (pH and Redox sensors)
ISA-Temp (Temperature sensors)
ISA- Flow (Flow velocity sensors)
ISA-Diff (Diffusivity sensors)
In Situ Connector
Universal connector for all
shallow water and deepsea sensors
In Situ Connector Membrane
Replaceable silicone membrane for in situ connector

The product is covered by a 1 year limited warranty.