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Optical Oxygen Meter - FireStingO2

  • Compact fiber-optic oxygen meter
  • 1, 2, or 4 oxygen channels
  • 1 temperature channel (optionally 4)
  • Works with robust probes, flow-through-cells, microsensors, minisensor, respiration vials, spots, nanoprobes, solvent-resistant probes...
  • Works with full range and trace sensors
  • Works in gas (%O2) and in liquids (DO)
  • Versatile logging software
  • Analog outputs and auto-mode

The compact FireStingO2 is a PC-controlled (USB) fiber-optic oxygen meter available with 1, 2 or 4 channels, which can be combined with the complete optical oxygen sensor and optical temperature sensor portfolio from PyroScience, ranging from microsensors (50 µm tip) to robust probes (3 mm tip), and including also diverse smart contactless sensor solutions (for measurements in closed systems, microfluidics and complex geometries). Most oxygen sensor types are available as full range versions and as trace range versions. A precision Pt100 temperature sensor can be connected to the temperature port, allowing automatic temperature compensation of the oxygen measurements in samples with varying temperatures. Or an optical temperature sensors can be connected to any channel of the FireStingO2 for true temperature compensation of oxygen measurements at another channel. Several FireStingO2 can be easily operated with a single PC in parallel, offering scalable fiber-optic oxygen meter systems with e.g. 8, 16, 32, or 64 channels, with the included user-friendly logger software.


Innovative REDFLASH Technology. The REDFLASH technology from PyroScience is based on unique oxygen-sensitive REDFLASH indicators. In contrast to common techniques using blue-light excitation, the REDFLASH indicators are excitable with orange-red light and show an oxygen-dependent luminescence in the near infrared (NIR). The REDFLASH technology impresses by (ultra)fast response times,  high precision, high reliability, low power consumption, low cross-sensitivity, and. reduced interferences.

Automatic Pressure Compensation and Humidity Sensors for Easy Calibration. The FireStingO2 device comes with integrated sensors for atmospheric pressure (mbar) and relative humidity (%RH) of the ambient air for a precision calibration procedure in water or ambient air with the user-friendly Oxygen Logger software.  Automatic Pressure Compensation. The integrated pressure sensor can be used for automatic pressure compensation during long-term oxygen measurements performed e.g. in units of %O2 or %air sat. These oxygen units show a strong dependence on atmospheric pressure changes (weather changes, altitude), which is simply neglected by most commercially available oxygen meters. The FireStingO2 offers automatic pressure compensation integrated seamlessly into the included Oxygen Logger software.

Analog Output. The FireStingO2 has 4 integrated analog outputs (0..2.5V), which can be configured and scaled  with the included Oxygen Logger software. Optionally, each analog output can be also configured as an alarm output (e.g. for control tasks like observing a defined oxygen level in fish tanks).

Auto-Mode. The FireStingO2 can be operated optionally without any PC connected to it in the so-called Auto-Mode. Simply activate the Auto Mode by connecting and powering the FireStingO2 with a standard micro-USB charger (as used for mobile phones) The measured values are read out via the analog output (or via the serial interface of the extension port).

Temperature Extension Module TeX4. The single temperature channel of the FireStingO2 can be easily expanded to 4 channels offering independent temperature compensation of all 4 oxygen channels more...


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Available Items

Item No. Description Pricing
in EU*
FSO2-1 FireStingO2 (1 oxygen port, 1 temperature port)
incl. logger software and transport case
on request
FSO2-2 FireStingO2 (2 oxygen ports, 1 temperature port)
incl. logger software and transport case
on request
FSO2-4 FireStingO2 (4 oxygen ports, 1 temperature port)
incl. logger software and transport case
on request
OXKIT‑FOP Starter Kit I with Fiber-Optic Oxygen Sensors (OXR50, OXF1100, OXROB10). The instrument is not included. 490 €
OXKIT‑CTL Starter Kit II with Contactless Oxygen Sensors (OXFTC, OXSP5, SPFIB, SPADBAS, OXVIAL4, ADVIAL4). The instrument is not included. 350 €

* Only EU-Prices shown. Contact us for pricing outside EU. Not for resale.


More details…

For each purchased instrument we offer starter kits including the most popular oxygen sensors:


Starter Kit I with Fiber-optic Oxygen Sensors
(item no. OXKIT-FOP, max. 1 per instrument)

1x retractable microsensor (OXR50)
1x fixed minisensor (OXF1100)
1x robust probe (OXROB10)


Starter Kit II with Contactless Oxygen Sensors
(item no. OXKIT-CTL, max. 1 per instrument)

1 pc. oxygen sensor flow through cell (OXFTC)
1x sensor spots (OXSP5) (including 8 spots)
1x spot fiber (SPFIB)
1 pc. basic spot adapter (SPADBAS)
1 pc. 4ml respiration vial (OXVIAL4)
1 pc. adapter ring for respiration vial (ADVIAL4).

Less details…

Available Sensors

This instrument can be combined with the following sensor types:
Optical Oxygen Sensors
Optical Temperature Sensors
Pt100 Temperature Sensors



For sensor specifications and response times, please refer to the webpages of the different sensor types.

Weight 350 g
Dimensions (WxDxH) 68 x 120 x 30 mm
Oxygen sensor connector Fiber-optic ST-connector
Input Channels 1, 2, or 4 for fiber-optic oxygen or temperature sensors
1 for Pt100 temperature sensor
Measuring Principle Lifetime detection of REDFLASH luminescence via fiber-optics
Excitation Wavelength 620 nm (orange-red)
Emmission Wavelength 760 nm (NIR)
Max. sampling rate 4 / 20 samples per seconds (with / without temperature compensation)
System requirements USB, Windows XP/VISTA/7/8/10
Power supply Max. 70mA at 5VDC from USB (typ. 50mA)
Extension Port Serial interface (UART), ASCII communication protocol
Analog Output 4 independent analog outputs, 0-2.5VDC, 14 bit resolution
Operating / storage temperature 0-50ºC / -10-60ºC
Max rel. humidity Non condensing conditions
Pt100 temperature sensor
(range / resolution / accuracy)
-30°C-150°C / 0.02°C / ±0.5°C
Internal pressure sensor
(range / resolution / accuracy)
300-1100mbar / 0.06mbar / typ. ±3mbar
Internal humidity sensor
(range / resolution / accuracy)
0-100%RH / 0.04% RH / typ. ±0.2%RH