The AR500 measuring system with ER120 for NO2, SO2 and O3 manufactured by Opsis AB can also be operated with the transmitter/receiver units ER 110 and ER150.
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The step motor for the automatic grid finding type RDM 543/100A, of manufacturer BERGER LAHR, in the AR500 measuring system with ER120 for NO2, SO2 and O3, of the company Opsis AB, was discontinued and therefore replaced by the step motor for the automatic grid finding type RDM 545/100A of manufacturer BERGER LAHR.
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