OXYPA paramagnetic oxygen sensor measurement ranges from 0...5 Vol% O up to 0...100 Vol% O 2 for precise and maintenance-free operation Description The OXYPA paramagnetic oxygen sensor module is designed for incorporation in your analyser-systems or for the solution of oxygen measuring problems using a microprocessor or PLC-system. The modules are maintenance-free, have a long lifetime, give a rapid and accurate signal response and are virtually insensitive to other gases. It has a compact design which meets high quality standards. Measuring principle Paramagnetic (partial pressure measuring with a rotatable glass dumbbell). The sensor is heated up to 55°C. Oxygen is one of few gases showing significant paramagnetic properties which can be used for its measurement using the following method: A small glass dumbbell filled with nitrogen is placed in an inhomogeneous magnetic field within the measuring cell. The system’s position of rest is defined by a light beam, a mirror on the dumbbell and a photo detector. The dumbbell is diamagnetic and tends to turn away from the magnetic field. The paramagnetic oxygen molecules of the sample gas, however, are drawn into the magnetic field, either displacing the dumbbell or forcing it to turn in the opposite direction. The turning is stopped by an opposite magnetic field generated by means of a coil around the dumbbell, the signal of the photo detector (deviation of the dumbbell from its position at rest) determining the necessary current intensity. The difference between the current when pure nitrogen is flowing and the current when the sample gas is flowing across the measuring cell is proportionate to the concentration of oxygen in the sample gas

OXYPA 0-25 % O2, 0-100 % O2, other ranges on request 0-5 % O2 4- 20 mA (galvanic isolated) 0-1 V, 0-4 V (galvanic isolated) 80x78x93 mm without electrical connector gas connection ca. 1090 g PVDF, glass, steel 1.4571, gold, viton, platinum-iridium, epoxy resin, nickel 3 mm, 1/8", 5 mm inner thread (option) <1h at 20°C ambient temperature < ± 0,03 % O2 (time base for gas switch >= 5 min) <± 0,1 % O2 / week may be higher during the first days after putting into operation or after longer period of storage or transport < ± 0,05 % O2 /°C <± 0,2 % of measured value /°C no influence 1 % air pressure...

• Excess oxygen analysis in all types of combustion systems • Room air monitoring for personnel and product safety • Monitoring oxygen content in fermentation vessels, biochemical fermenters and sewer gases • Monitoring atmosphere in fruit stores and hot-houses • Process analysis for continuous monitoring of required and/or allowable oxygen content • Monitoring of low-temperature and combustion gases • Monitoring automotive exhaust and internal combustion engines • Monitoring blanket gases • Monitoring tunnel and duct air quality • Excess oxygen analysis in controlled atmospheres for systems...

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