search

Bare Fiber Oxygen Microsensor

OXB50-OI

  • 50-70µm sharp sensor tip
  • Optically isolated (OI)
  • Works in gas (%oxygen) and liquids (DO)
  • No oxygen consumption
  • Negligible drift

The fiber-optic oxygen sensors from PyroScience feature no oxygen consumption, no stirring sensitivity, an extremely long shelf time, resistance to corrosive environments (e.g. seawater) and are suitable for multiple applications in gas, water and aqueous samples.

This fiber-optic microsensor consist of an optical fiber (230 µm) with a sensor tip diameter of approximately 50-70 µm. Microsensors are perfectly suited for measurements in small samples and for profile measurements (e.g. in sediments, soils, plant tissue, biofilm) with high spatial resolution (microprofiling).

Typical applications:

  • Photosynthesis 
  • Measurements in illuminated or phototrophic/fluorescing samples

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.

Bare fiber. The bare fiber oxygen sensors are principally identical to our Retractable Needle-Type oxygen sensors, but they come without any sensor housing.

ST-connector. This connector is our standard sensor connector for sensor compatible PC-operated and handheld FireSting devices.

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.

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

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

Sensor Versions. There are further versions available of this sensor type.  Please use the filter function or the inquiry form to find the suited sensor version for your application.

Price List

0% O2 Calibration Capsules 

OXCAL

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

Every PyroScience oxygen meter with ST-connector (lab devices) is compatible with 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

FSO2-C1 + OXB50-OI

Choose the one channel oxygen meter FireSting-O2 with the bare fiber oxygen microsensor OXB50-OI.

  • Good value
  • Ready to go lab setup

Exemplary Setup

FSGO2 + OXB50-OI

Choose the pocket oxygen meter FireSting-GO2 with the bare fiber oxygen microsensor OXB50-OI.

  • Stand alone logging
  • With battery and display
 

Exemplary Setup

FSPRO-4 + OXB50-OI

Choose the multi-analyte FireSting-PRO (4 chan.) with the bare fiber oxygen microsensor OXB50-OI.

  • 4 freely configurable optical channels
  • + Additional pH sensor support

Would you like to stay informed?