Model 905 Headspace Oxygen Analyzer

The Quantek Model 905 is a benchtop, portable oxygen analyzer used primarily for the measurement of residual oxygen in gas-flushed food packages.

The Model 905 is used for the measurement of residual oxygen in food packages. With an expected oxygen sensor life of 4-5 years, it vastly outperforms other oxygen analyzers with a cheap sensor that might last 1-2 years.

Use it in the lab, or on the packaging line. While the performance and functionality is the same as our Model 901, the Model 905 is the better choice for conducting testing when the operator is stationary. This is primarily due to its tip up feet, and form factor. Also, its high end rugged metal enclosure ensures its overall durability.

SKU: Model 905 Category:
Lead Time: 2-4 business days


The sample probe is tipped with a particulate filter and syringe needle. Affix the foam septa to your package, insert the needle through the septa, and press the pump button. Sample from your package is drawn through the probe and into the internal oxygen sensor.

The pump will draw about 5 cc/second from your package. The pump will run from 2 to 12 seconds and this time is easily adjustable using the controls. This adjustment is especially important for packages of varying size, or for rigid packages. The oxygen measurement displays on the LCD within 15-20 seconds.


The Model 905 oxygen analyzer is the market leader for durability, simplicity, and reliability. The initial lower cost, and longer-life sensor, makes it best in class for laboratory package oxygen analyzers.


The sensor is unaffected by high levels of background gases such as nitrogen or carbon dioxide, and unaffected by trace hydrocarbons. You can use the Model 905 for applications where oxygen level is very high (50 to 100%) without overloading the sensor. The expected oxygen sensor life is typically 4-5 years, unlike other analyzers with a sensor that last 1-2 years.

Expected Lifetime (oxygen) 4-5 years
Oxygen Range 0.0 to 100%
Oxygen Sensitivity 0.1% (or optional 0.01%)
O2 Resolution 0.1% (or optional 0.01%)
Analog Output Not Available
Resolution 0.1% (or optional 0.01%)
Accuracy : +/- 0.1% (for oxygen levels below 10%)
Drift less than 0.4% per year
Oxygen Sensor Type Proprietary electrochemical cell, expected lifetime 4-5 years
Response Time 15 seconds to T95
O2 Sensor Lifetime 4-5 Years
O2 Sensor Body ABS Resin
Sample Connection Sample Probe
Sample Method Pump
Sample Pump Internal, draws ~5cc/sec, with 2-12 second adjustable timer (on back of unit)
Pump Timing 2-12 second adjustable pump time, potentiometer on side of analyzer
Minimum Sample Required 10cc
Sampling Assembly Probe with female luer connection for filter and needle, low volume PTFE tubing
Oxygen Calibration Controls SPAN adjustment, zero adjustment
Instrument Calibration Calibrates with room air; SPAN adjustment on back; ZERO adjustment on back
Exhaust port Vents to air
Power Supply 100-240V (50-60Hz) Charger included, with US or international interchangeable plug adapter (upon request)
Backup Power Optional 12V internal battery pack
Battery Operation Optional
Input Voltage 100-240V, 50-60Hz
Battery Life 8-12 hours before recharging
Measures: O2, CO2 O2
Form Factor Benchtop
Size 9.8in x 4in x 10in. (249 x 102 x 254 mm)
Weight 8 lb. (3.6 Kg)
Warranty 2 years, parts and labor
Standards CE, RoHS
Included Consumables 200 foam septas, 2 luer fit needles, 2 particulate filters, 2 liquid block filters
Options Battery, 0.01% resolution
Included Documentation Owners manual (includes operating instructions with detailed calibration instructions, calibration certficate, precautions), NIST calibration certificate
Origin of Goods Our products are manufactured in the U.S.A.
Products by Gas Oxygen
Products by Applications Headspace / Package

Includes everything you need to begin sampling:

  • Built-in pump, sample probe.
  • Starter pack of 200 foam septas
  • 2 needles.
  • 2 small moisture filters,
  • 2 small moisture blocking filters,
  • Power supply / charger (for analyzers with optional internal battery) – (International compatible 100-240V)

Optional Items

  • Optional Internal battery pack (NiMH), capable of 2100 cycles (lifespan of 3 to 6 years)
  • Optional upgrade oxygen LCD to .01%