A New Hygrometer

Arnold Romberg; L. W. Blau

doi:10.1364/JOSA.13.000717

Journal of the Optical Society of America
Vol. 13,
Issue 6,
pp. 717-724
(1926)
•https://doi.org/10.1364/JOSA.13.000717

A New Hygrometer

Arnold Romberg and L. W. Blau

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Arnold Romberg and L. W. Blau, "A New Hygrometer," J. Opt. Soc. Am. 13, 717-724 (1926)

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Abstract

The hygrometer described is continuous-indicating; a value of the humidity is obtained by balancing a column of atmospheric air against a column of air saturated with water vapor and observing the effect, on a suspended vane, of the difference of pressure due to the different densities. The instrument used in the investigation is more sensitive than the Regnault-Alluard type of dew-point hygrometer and can be made a hundred times as sensitive if required.

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Deflection cm	−15	−10	−5	0	5	10	15	20	25	30	35

0	100	100	100	100	100	100	100	100	100	100	100
0.1	75	84	89.6	93.1	95.1	96.5	97.4	98.2	98.7	98.9	99.2
0.2	50.5	68.0	79.1	86.2	90.3	93.1	95.0	96.3	97.3	97.9	98.5
0.3	23.8	52.0	68.7	79.3	85.4	89.6	92.5	94.5	95.9	96.9	97.7
0.4	0	36.0	58.3	72.3	80.4	86.2	90.0	92.7	94.6	95.9	96.9
0.5		20.0	47.9	65.4	77.3	82.7	87.5	90.9	93.3	95.0	96.2
0.6		4.0	37.5	58.3	70.8	79.2	85.0	89.8	91.9	94.0	95.5
0.7		0	27.0	51.6	66.0	75.8	82.6	87.3	90.6	93.0	94.7
0.8			16.6	44.7	61.1	72.3	80.1	85.4	89.2	92.0	93.9
0.9			6.2	37.7	56.3	68.9	77.6	83.6	87.9	90.9	93.2
1.0			0	30.8	51.4	65.4	75.1	81.8	86.6	89.9	92.4

1.4				3.4	32.0	51.6	65.1	74.5	81.2	85.9	89.4
1.5				0	27.2	48.1	62.6	72.7	79.8	84.9	88.6

2.0					2.9	30.9	50.1	63.6	73.1	79.9	84.8
2.1					0	27.4	47.6	61.8	71.4	78.9	84.0

2.8						3.2	30.2	49.0	62.4	71.9	78.8
2.9						0	27.7	47.2	61.0	70.9	78.0

4.0							0.3	27.2	46.2	57.9	69.8
4.1							0	25.4	44.9	58.9	69.0

5.4								1.1	27.4	43.8	59.2
5.5								0	26.1	44.8	58.4

7.4									0.5	25.8	44.0
7.5									0	24.8	43.3

9.9										0.7	25.1
10.0										0	24.4

13.2											0.2
13.3											0

Abstract

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Tables (1)

Equations (2)

Journal of the Optical Society of America