Gas analyzer
First Claim
1. A system for effecting and monitoring the flow of a gas mixture through a gas analyzer sampling device comprising:
- a first line for connecting the input of the sampling device to the source of the gases being monitored, pump means, a second line for connecting the output of the sampling device to said pump means, and first and second complementary control means mounted on said sampling unit and operatively connected to said pump means which is operable to keep said pump means from being turned on unless a sampling unit having said first control means is connected to said pump means.
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Accused Products
Abstract
Sampling attachments or systems for infrared gas analyzers of the non-dispersive type. Major components of the system include a sampling device or cuvette, a vacuum pump for effecting a flow of the gases to be analyzed through the cuvette, a microprocessor based pump control, and a switch which is closed and allows the pump to be turned on only if an appropriate sampling cuvette is connected up to the pump. The sampling attachments are designed for medical applications--to provide readings of tidal carbon dioxide, for example. They have a minimally invasive nasal cannula for collecting the gases which are to be subjected to analysis; viz., those exhaled by a patient. These gases are conducted to the cuvette through a line which is gastight but allows moisture to escape, thereby keeping moisture mixed with the gases being analyzed from corrupting the readings outputted by the gas analyzer. The attachment can be easily and quickly disassembled and the components disposed of or sterilized and recycled if they become contaminated. Provision is made for collecting the gases after they have been discharged from the cuvette so that they will not be discharged into and perhaps contaminate the ambient surroundings.
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Citations
16 Claims
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1. A system for effecting and monitoring the flow of a gas mixture through a gas analyzer sampling device comprising:
- a first line for connecting the input of the sampling device to the source of the gases being monitored, pump means, a second line for connecting the output of the sampling device to said pump means, and first and second complementary control means mounted on said sampling unit and operatively connected to said pump means which is operable to keep said pump means from being turned on unless a sampling unit having said first control means is connected to said pump means.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for effecting and monitoring the flow of a gas mixture through a gas analyzer sampling device, said system comprising:
- a first line for connecting the input of the sampling device to the source of the gases being monitored;
pump means;
a sampling device removably coupled between said first and second lines, said sampling device having a passage for the gases being analyzed extending therethrough and communicating with said first and second lines; and
means including a pressure transducer in line between said pump means and said sampling device for monitoring the pressure on the gases flowing through said system and interrupting the operation of the pump means if said pressure falls below a specified level. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
- a first line for connecting the input of the sampling device to the source of the gases being monitored;
Specification