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Optical Oxygen Meter - FireStingO2-Mini

  • Optical oxygen meter - OEM module
  • UART interface
  • 1 Oxygen channel
  • 1 Temperature channel
  • Dimensions 67 x 25 x 25 mm
  • Works in gas (%O2) and in liquids (DO)
  • Integrated humidity and pressure sensors
  • Analog outputs and auto-mode
  • Optional USB adapter cable

FireStingO2-Mini (FSO2-MINI-ST)


Based on the technology of the USB-device FireStingO2 we developed the compact 1 channel module FireStingO2-Mini for OEM applications. The technical performance of the FireStingO2-Mini is identical to the normal FireStingO2 with 1 oxygen channel. There are only two principle differences:

(1) Due to space limitations there is no dedicated connector for the external temperature sensor, but the cable of a temperature sensor (4-wire PT100) can be soldered directly to the FireStingO2-Mini.

(2) The FireStingO2-Mini has no integrated USB-port. It offers a standard UART interface for integration in custom electronics (details on request). However, we optionally offer an external USB adapter cable FSO2-MINI-USB including a licence for the Pyro Oxygen Logger software. When connected to this USB adapter cable, the FireStingO2-Mini can be comfortably configured and operated with a PC using the versatile Pyro Oxygen Logger software.

Available Items

Item No. Description Pricing
in EU*
FSO2-MINI-ST FireStingO2-Mini with ST-connector, 1 oxygen port, 1 temperature port, UART interface on request
FSO2-MINI-USB USB adapter cable for FireStingO2-Mini incl. licence for software "Pyro Oxygen Logger" 290 €

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

Available Sensors

This instrument can be combined with a broad range of oxygen and temperature sensor heads:
Oxygen Sensors


Given for 2-point calibrated oxygen sensors at 1013mbar absolute pressure.

Normal range versions hPa %O2 %air sat. mg/L
Optimum measuring range 0-500 0-50 0-250 0-23
Maximum measuring range (not specified) 0-1000 0-100 0-500 0-45
Typ. Detection limit* 0.2 0.02 0.1 0.01
Typ. Resolution at 1% O2* 0.1 0.01 0.05 0.005
Typ. Resolution at 20% O2* 0.5 0.05 0.25 0.025
Typ. Accuracy at 1% O2* ±0.2 ±0.02 ±0.1 ±0.01
Typ. Accuracy at 20% O2* ±2 ±0.2 ±1 ±0.1
Trace range versions hPa %O2 %air sat. mg/L
Optimum measuring range 0-100 0-10 0-50 0-5
Maximum measuring range (not specified) 0-210 0-21 0-100 0-9
Typ. Detection limit* 0.05 0.005 0.02 0.002
Typ. Resolution at 0.2% O2* 0.02 0.002 0.01 0.001
Typ. Accuracy at 0.2% O2* typ. 2% of reading, but not better than 0.01%O2

* For precise values and response times, please refer to the specifications of the different sensor types provided separately.

Weight 70 g
Dimensions (WxDxH) 67 x 25 x 25 mm
Oxygen sensor connector Fiber-optic ST-connector
Input Channels 1 for fiber-optic oxygen sensors, 1 for temperature sensor (solder points for PT100)
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)
Power supply Max. 50mA at 3.5 - 5.0 VDC
Interface 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
Temperature sensing principle 4-wire PT100
Temperature sensor
(range / resolution / accuracy)
-30°C-150°C / 0.02°C / ±0.5°C
Integrated pressure sensor
(range / resolution / accuracy)
300-1100mbar / 0.06mbar / typ. ±3mbar
Integrated humidity sensor
(range / resolution / accuracy)
0-100%RH / 0.04% RH / typ. ±0.2%RH