Oxygen Sensor Spots for Aquatic Applications


  • Sensor spots (8 pcs.) 5mm in diameter
  • for underwater devices (-SUB)
  • Minimized influence of hydrostatic pressure
  • Suitable for in-situ incubations
  • No oxygen consumption

Oxygen sensor spots allow oxygen measurements in closed sample containers under water with contactless read-out through a transparent window (glass, acryl glass) with special adapters and optical fibers. This enables incubations in closed systems in high water depths. 

The sensor spot can be used down to 4000m depth and has a pressure influence of ca. 1%/1000m. For read-out a suitable underwater device and an optical fiber with underwater connector is required (SPFIB-LNS-SUB or SPFIB-LNS-CL2-SUB).

Standard range. This sensor is specified for an optimum measuring range of 0 to 500 hPa oxygen (0 -250% air saturation). However, without specifications, it is possible to measure in up to 1 bar pure oxygen/100% oxygen saturation/100% oxygen. For detailed specifications, see the respective pdf file in the Downloads tab.

Optical isolation. For applications at high ambient light (e.g. direct sunlight, illuminated samples) and in fluorescing / light-sensitive samples, an additional optical isolation (-OI) protection layer is added to the sensor surface to reduce enhanced sensor aging and to avoid interference with the oxygen measurements

Easy calibration. A simple ambient air calibration can be performed with a few clicks (<1 minute for equilibrated setup). For precise oxygen measurements close to 0% we also offer easy-to-use calibration capsules (OXCAL). Simply dissolve the content of one calibration capsule in 50 ml distilled water, wait 10-15 minutes, perform the 0% calibration and start measurements with a calibrated sensor. For detailed calibration recommendations refer to the manual in the downloads tab.

Good value. This product is a basic sensor for applications with no special requirements (like ultra fast response times, resistance to solvents, low detection limit)

Applications. To get an overview of potential applications and to see our sensors in action, please visit our Applications site!

Price List

Please visit our accessories site for all available accessories for our contactless sensors.

Optical Fiber for Underwater Devices


  • With underwater SUB-connector (SUB)
  • For contactless sensor readout
  • To measure through transparent windows
  • Ca. 1m length
  • Compatible to SPADBAS

Optical Fiber for Underwater Devices


  • With underwater SUB-connector (SUB)
  • For contactless sensor readout
  • To measure through transparent windows
  • Ca. 2m length
  • Compatible to SPADBAS

Basic spot adapter


Silicone Glue


  • Transparent silicone glue Elastosil E43, (ca. 90 ml)
  • For fixing sensor spots or SPADBAS at container walls

Gluing Kit


  • Gluing kit with 1 spoon spatula (SPTLA), disposable syringe with screw cap, Luer-Lock fixture, 5 flat needles

0% O2 Calibration Capsules 


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

Every PyroScience oxygen meter with a SUB-connector (underwater devices) is compatible to this sensor. Use this link to get a list of all compatible meters. Select additional requirements to find the optimal meter for you and your application!


Exemplary Setup


This combination enables: 

Exemplary Setup


This combination enables: 

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