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Oxygen Ingress Measurement in Colored PET Bottles
Oxygen-Sensitive Cap OSC-PSt6
To measure the oxygen ingress non-invasively in colored bottles an oxygen sensor spot type PSt6 is placed onto a transparent closure - the oxygen sensitive cap - which is adapted to the respective PET bottle opening. Three seals ensure the gas tightness of the closure. A safety screw adapted to the bottle thread is used to fix the closure.
- Non-invasive measurements
- No consumption of oxygen
- Measures oxygen in liquids as well as in gas phase
- Oxygen ingress determination under real conditions
Food & Beverage: Oxygen Permeation Measurement in PET Bottles
Non-invasive oxygen sensors measure both in liquid and in gaseous (headspace) phases. They perform through transparent materials up to a thickness of 10 mm and even through slightly opaque packaging. The measurement is carried out by firmly holding the fiber optic probe against the side of a PET bottle where the sensor spot is positioned. Adjustable mountings and bespoke fixtures are available. This system allows even the parallel measurement of different bottles as the fiber can be moved from bottle to bottle.
|Specifications||Gaseous & Dissolved O2||Dissolved O2|
|*after two-point calibration as described in the manual|
|Measurement range|| |
0 – 5 % O20 – 41.4 hPa
0 – 2 mg/L0 – 56.9 µmol/L
|Limit of detection||0.002 % oxygen|
± 0.0007 % O2 at 0.002 % O2
± 0.0003 mg/L at 0.001 mg/L
|Accuracy*||± 1 ppb or ± 3 % of the respective concentration; whichever is higher|
|Drift at 0 % oxygen||< 2 ppb within 30 days (sampling interval of 1 min.)|
|Measurement temperature range||from 0 to + 50 °C|
|Response time (t90)||< 6 sec.||< 40 sec.|
|Compatibility||Aqueous solutions, ethanol, methanol|
pH 1 – 14
|Cross-sensitivity||Organic solvents, such as acetone, toluene, chloroform or methylene chloride|
Ethylene oxide (EtO)
3 % H2O2
|Calibration||Two-point calibration with oxygen-free environment (nitrogen, sodium sulfite) and a second calibration value optimally between 1 % and 2 % oxygen|
|Storage stability||24 months provided the sensor material is stored in the dark|
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