Oxigraf is the leading supplier of Laser Diode Absorption Spectroscopy sensors for a wide range of industrial, medical, aerospace, and research equipment applications. Our patented technology in these solid state sensors provides unparallel reliability with fast response times for oxygen measurements over a range of 0-100% levels and resolutions to 0.01% with high accuracy and repeatability. Temperature and Pressure compensation is performed automatically by the sensor. Cross sensitivity to other gas molecules within the sample mixture is also minimized. Single and dual point calibration to known gas values provides accurate measurements. Auxiliary carbon dioxide and other gas sensors can also be incorporated into the sensor housing. Custom configurations and pre/post sale engineering support for your needs are available from our team in California.

Oxigraf sensors are proven solutions for systems and products used by a variety of manufacturers in very diverse industries; let us know how we can serve you.
Unit of Measure



N/A Exercise Test and Respiratory Gas Monitoring

Sensor Length

N/A 7

Sensor Mode


Oxygen Range

N/A 2 to 100%

CO2 Range

N/A 0 to 10%

Gas Input/Output

N/A 1/16 inch OD single barb stainless steel tubing.

Control and Output

N/A Full Duplex RS-232 serial digital (RS-232 levels or CMOS levels available). Sensor output is 8 bit serial stream at 9600 baud.

Sensor Output

N/A Analog, 0-1.0 Vp-p (both O2 and optional CO2).


N/A +5 V/+12 VDC power or +12 VDC only optional. +5 V at 0.5 A typical (2 A max)/+12 V at 0.3 A typical (0.8 A max) or 12 VDC at 0.8 A typical (1.8 A max) with heat sink temperature 0º to 55ºC.

Pressure Correction

N/A The pressure corrected range for the O2 sensor is 200-1200 mbar absolute. For the oxygen sensor, an optional range of 150 to 2000 mbar is available.

Initialization Time

N/A 40 seconds to operation, 5 minutes to meet accuracy specification at a start temperature of 20ºC.

CO2 Sensor Option

N/A Integrated sensor with 0 to 10% reading, range of 0 to 30% is also available. Pressure correction for these sensors is over 500 to 1180 mbar absolute.

Optional Features

N/A Latching Molex connectors, single voltage power input, Cross Corrected (XC) any mixture or Low Noise (LN) air mixture mode.

Sensor Lifetime

N/A Operating laser diode median lifetime > 100000 hrs.


N/A 0.9 lbs450 gram


N/A PCS and Heat Sink are Approximately 6.5 inches (165.1mm) long by 2.5 inches (63.5) wide by 1.525 inches (38.7mm) height, excluding sensor extrusion protrusion and gas input/output tubes.

Limited Warranty

N/A 1 year repair/replace at factory.

Electronic Filtering

N/A Basic Measurement frequency is 108.7 Hz or 9.2 ms per sample. Oxigraf sensors have built-in electronic filtering for response time adjustment and compensation for flow rates and stability of measurements. Filtering can be set at No filtering, 20/40/80/160 ms running average, 200/300/500 ms, 1/2/4/8/16 second exponential response, or Prediction filter to enhance response time.