GB1406959A - Device for measuring the humidity of a gas - Google Patents
Device for measuring the humidity of a gasInfo
- Publication number
- GB1406959A GB1406959A GB4890673A GB4890673A GB1406959A GB 1406959 A GB1406959 A GB 1406959A GB 4890673 A GB4890673 A GB 4890673A GB 4890673 A GB4890673 A GB 4890673A GB 1406959 A GB1406959 A GB 1406959A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wet
- chamber
- dry
- humidity
- sensing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
- G01N25/62—Investigating or analyzing materials by the use of thermal means by investigating moisture content by psychrometric means, e.g. wet-and-dry bulb thermometers
- G01N25/64—Investigating or analyzing materials by the use of thermal means by investigating moisture content by psychrometric means, e.g. wet-and-dry bulb thermometers using electric temperature-responsive elements
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
1406959 Measuring humidity electrically ATMOS FRITZSCHING & CO GmbH 19 Oct 1973 48906/73 Heading G1N A portable wet and dry bulb hygrometer comprises a first temperature sensitive resistance element 72 Fig. 1 in a sealed chamber 24, sensing the dry ambient temperature by contact with a metal ring 70 forming part of chamber 24, sensing second temperature sensitive resistor 82 Fig. 5 maintained inside a chamber 26 made of gaspermeable material, in a wet atmosphere by water in a reservoir 22, fed through an absorbent rod 44 and carried on by a capillary tube 48 and a wick 104 to an evaporator 88 in which the element 82 is located. The two resistance elements 82, 72 are connected in the feedback paths of amplifiers AI, All Fig. 7 whereby the output voltages U 1 , U 2 are respectively proportional to the wet and dry temperatures. The algebraic difference is obtained in amplifier AIII whose output, indicated on meter I, represents the humidity of the test atmosphere. Operating switch 5, to cut out the wet temperature voltage signal enables meter I to indicate ambient temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4890673A GB1406959A (en) | 1973-10-19 | 1973-10-19 | Device for measuring the humidity of a gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4890673A GB1406959A (en) | 1973-10-19 | 1973-10-19 | Device for measuring the humidity of a gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1406959A true GB1406959A (en) | 1975-09-17 |
Family
ID=10450395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4890673A Expired GB1406959A (en) | 1973-10-19 | 1973-10-19 | Device for measuring the humidity of a gas |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1406959A (en) |
-
1973
- 1973-10-19 GB GB4890673A patent/GB1406959A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |