COMPACT MEASURING APPLIANCE AND METHOD FOR DETECTING HYDROCARBONS
First Claim
1. A measuring appliance for determining a hydrocarbon concentration in compressed air comprising a housing and the following components arranged in the housing, the measuring appliance comprising:
- a main gas line with an inlet for the compressed air,a first gas line branching off from the main gas line for a compressed air to be measured, wherein the first gas line connects the main gas line to a first switchable valve,a second gas line for a reference compressed air branches off from the main gas line, wherein the second gas line connects the main gas line to the first switchable valve,a third gas line comprising copper connecting the first switchable valve to a sensor unit, wherein the sensor unit has a photoionization detector with a measurement chamber,a reference gas unit arranged in the second gas line containing an oxidation catalyst, in which the reference compressed air is generated from the compressed air,a pressure controller arranged in the main gas line for ensuring a constant through-flow of compressed air ranging from 3 to 16 bar,a pressure measuring appliance arranged upstream of the sensor unit for determining a pressure of the respective compressed air flowing into the sensor unit,a temperature sensor arranged downstream of the sensor unit for determining a temperature of the respective compressed air leaving the sensor unit, anda cooling device for cooling the reference gas unit.
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Accused Products
Abstract
A measuring appliance for determining a hydrocarbon concentration in compressed air comprises a housing and the following components arranged in the housing: a main gas line with an inlet for the compressed air, and three additional gas lines, the first branching from the main gas line for compressed air to be measured, the first line connecting the main line to a first switchable valve. The second gas line branches from the main gas line, for reference compressed air, and connects the main gas line to the first switchable valve. The third gas line connects the first switchable valve to a sensor unit and includes copper. A reference gas unit is arranged in the second gas line and contains an oxidation catalyst in which the reference compressed air is produced from the compressed air. A pressure controller is arranged in the main gas line for ensuring a constant through-flow of the compressed air in the range from 3 to 16 bar. The appliance further includes a pressure measuring device arranged upstream of the sensor unit a temperature sensor arranged downstream of the sensor unit, and a cooling apparatus for cooling the reference gas unit.
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Citations
13 Claims
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1. A measuring appliance for determining a hydrocarbon concentration in compressed air comprising a housing and the following components arranged in the housing, the measuring appliance comprising:
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a main gas line with an inlet for the compressed air, a first gas line branching off from the main gas line for a compressed air to be measured, wherein the first gas line connects the main gas line to a first switchable valve, a second gas line for a reference compressed air branches off from the main gas line, wherein the second gas line connects the main gas line to the first switchable valve, a third gas line comprising copper connecting the first switchable valve to a sensor unit, wherein the sensor unit has a photoionization detector with a measurement chamber, a reference gas unit arranged in the second gas line containing an oxidation catalyst, in which the reference compressed air is generated from the compressed air, a pressure controller arranged in the main gas line for ensuring a constant through-flow of compressed air ranging from 3 to 16 bar, a pressure measuring appliance arranged upstream of the sensor unit for determining a pressure of the respective compressed air flowing into the sensor unit, a temperature sensor arranged downstream of the sensor unit for determining a temperature of the respective compressed air leaving the sensor unit, and a cooling device for cooling the reference gas unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification