Optical Oxygen & Temp Meter


  • 1-channel underwater OEM device
  • A broad range of different compatible sensors
  • Compact dimensions 67 x 25 x 25 mm
  • Analog outputs & auto-mode
  • For custom integration into underwater housings

Underwater OEM Optical Oxygen & Temp Meter - FSO2-SUBPORT

The OEM module FSO2-SUBPORT is a fiber-optic oxygen meter for integration into custom-made underwater housings. The FSO2-SUBPORT consists of a special version of the FireSting-O2-Mini oxygen meter combined with a pressure stable optical connector (optical feed-through). It can be used for many different applications like water column and sediment profiling, eddy covariance studies, etc.

The FSO2-SUBPORT is easy to mount and can also be used to retrofit existing underwater equipment since its thread is compatible to some of the most popular deep-sea connectors. The titanium connector is open face pressure stable up to 4000 m water depth (400 bars). It is typically mounted in the lid of pressure cylinders.

The module has a serial interface to control the instrument and to retrieve data, as well as high-resolution analog outputs. Optionally, an USB adapter cable FSO2-MINI-USB is available including a licence for the Pyro Oxygen Logger software. When connected to this USB adapter cable, the FireSting-O2-SubPort can be comfortably configured and operated with a PC using the versatile Pyro Oxygen Logger software.

Oxygen Fiber Sensors with SUB-connector

Every PyroScience fiber sensor with a SUB-connector is compatible to this meter. Select additional requirements to find the optimal fiber sensor for you and your application!

Electric Pt100 temperature probe

Pt100 Temperature Probe


  • Flexible Teflon-coated temperature probe
  • With no connector (-NC), for soldering
  • Tip and cable are completely submersible in water

Evaluation Setup


Required setup for evaluation process
1x FSO2-SUBPORT with USB cable

Exemplary Setup


Common setup consists of FSO2-SUBPORT together with the ultra-high-speed OXR430-UHS-SUB oxygen sensor

0% O2 Calibration Capsules 


For recommended 0% O2 calibration of optical oxygen sensors. Each capsule results in 50mL calibration solution (PU=10).

USB Interface Cable


USB interface cable for ealuation of FSO2-SUBPORT, incl. versatile logger software for easy setup and calibration


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