Hydrogen chlorine level detector
OwnerSaroj Kumar Sahuinventor
Life of this patent
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Abstract
A method for detecting a ratio of a first substance to that of a second substance in a mixture of substances, includes generating heat in a heating element; measuring a temperature proximate to the heating element; and calculating the ratio of the first substance to that of the second substance from the temperature. In some embodiments, the ratio of the concentrations of hydrogen and chlorine in a mixture of hydrogen and chlorine may be determined.
Claims15
A sensor system for detecting a ratio of a first substance to that of a second substance in a gaseous mixture of the first and second substances, wherein the first substance and the second substance have substantially different thermal conductivities, the sensor system comprising:
- a temperature sensor, capable of measuring the temperature of the gaseous mixture;
- a pressure sensor capable of measuring the pressure of the gaseous mixture;
- and
- a thermistor.
A method for detecting a ratio of a first substance to that of a second substance in a gaseous mixture, the method comprising:
- placing a sensor in an environment comprising the gaseous mixture, having a known temperature and pressure, the sensor comprising a thermistor operating a dissipative mode and carrying a prescribed current;
- measuring a voltage change across the thermistor;
- and
- determining the ratio of the first gas to that of the second gas from the measured voltage after and gas dependent constant corrections are applied.
A sensor system for detecting a ratio of a first substance to that of a second substance in a gaseous mixture of the first and second substances, wherein the first substance and the second substance have substantially different thermal conductivities, the sensor system comprising:
- a thermistor;
- and a resistor coupled in series to the thermistor;
- wherein the resistor is selected according to the following method:
- measuring the voltage across the thermistor when the thermistor is placed in a gaseous mixture of the first substance and the second substance having a known concentration molar ratio;
- comparing the measured voltage to a standard voltage;
- and
- selecting a resistor that, when placed in series with the thermistor, will alter the measured voltage of the thermistor to be substantially equal to the standard voltage.
Dependencies are inferred from the claim text.