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An apparatus for detecting the concentration of an explosive or hazardous gases or for the detection of the concentration of oxygen into combustible gas mixtures.
An apparatus for detecting the concentration of an explosive or hazardous gases or for the detection of the concentration of oxygen into combustible gas mixtures.
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机译:一种用于检测爆炸性或危险气体浓度或用于检测可燃气体混合物中氧气浓度的设备。
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摘要
The sensor resistance (1) is arranged with three further : resistances (3,4,5) in a bridge circuit (6) fed with a constant current or voltage, and the diagonal branch of the bridge circuit is led to a signal output. The diagonal branch (7,8) is connected to a differential amplifier (9) and the output from the amplifier is connected to a transistor (11), the drain connection of which is connected to the positive input of the amplifier as well as to the assigned diagonal branch point (7) of the bridge circuit (6) and its working resistor (10) is connected to the signal output (12,13). An intermediate connected shunt regulating amplifier (9,10,11) is provided between the diagonal branch (7,8) and the signal output (12,13). USE/ADVANTAGE - Detector for detecting explosive or health risk gases or concn. of oxygen in combustible gas mixtures. Known type development, so that linearity of bridge signal depending on concn. of measured gas is improved.
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