Gas detection device
First Claim
1. In a gas detector alternately introducing a reference gas and a test gas into a sensor within an enclosure for detecting a particular component contained in the test gas, the gas detector characterized by that a source of supply of the reference gas is installed within the enclosure and the test gas is taken in from outside the enclosure.
2 Assignments
0 Petitions
Accused Products
Abstract
A gas detector capable of accurately measuring particular components (odors or the like) contained in an ambient gas to be measured, being compact, and capable of being easily formed to be portable, or producing low noise and capable of being small-sized. Having zero gas cylinder (9) as a supplying unit of a zero gas and component parts disposed within its enclosure (2) and using syringe (3) as a gas intake/exhaust unit, it alternately introduces a test gas, i.e., an ambient gas taken in from outside enclosure (2) through piping (12a), and the zero gas supplied from zero gas cylinder (9) into sensor unit (7) and measures the test gas, while having operation of each unit controlled by data processor (11). Thus, accurate measurement of the test gas is achieved by relatively comparing results of measurement on the gases at each measurement. In addition, gas detector (1) can be moved to a spot where measurement is to be made to have the test gas there measured. Further, by use of a cylinder mechanism producing low noise, the detector can quantify gas intake/exhaust and can be made small in size.
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Citations
38 Claims
- 1. In a gas detector alternately introducing a reference gas and a test gas into a sensor within an enclosure for detecting a particular component contained in the test gas, the gas detector characterized by that a source of supply of the reference gas is installed within the enclosure and the test gas is taken in from outside the enclosure.
- 19. In a gas detector alternately introducing a reference gas and a test gas into a sensor within an enclosure for detecting a particular component in the test gas, the gas detector wherein a source of supply of the reference gas is connected to the sensor, the test gas is taken in from outside the enclosure, and the reference gas or the test gas is introduced into the sensor by reciprocating motion of a piston of a cylinder mechanism formed of the piston and the cylinder in combination for taking in and exhausting the gas by expansion and contraction of its inner volume.
- 33. A gas detector alternately introducing a reference gas and a test gas into a sensor for detecting a particular component contained in the test gas, characterized by that the sensor and the source of supply of the reference gas are integrated in one body.
Specification