Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions (Includes all amendments and changes 12/21/2020).Translate name
STANDARD published on 1.11.2020
Designation standards: ASTM E104-20a
Publication date standards: 1.11.2020
The number of pages: 5
Approximate weight : 15 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM
aqueous solution, constant relative humidity, control of relative humidity, equilibrium relative humidity, humidity, relative humidity, saturated salt solutions,, ICS Number Code 19.040 (Environmental testing)
|Significance and Use|
5.1ï¿½Standard value relative humidity environments are important for conditioning materials in shelf-life studies or in the testing of mechanical properties such as dimensional stability and strength. Relative humidity is also an important operating variable for the calibration of many species of measuring instruments.
1.1ï¿½This practice describes one method for generating constant relative humidity (rh) environments in relatively small containers.
1.2ï¿½This practice is applicable for obtaining constant relative humidities ranging from dryness to near saturation at temperatures spanning from 0 ï¿½C to 50 ï¿½C.
1.3ï¿½This practice is applicable for closed systems such as environmental conditioning containers and for the calibration of hygrometers.
1.4ï¿½This practice is not recommended for the generation of continuous (flowing) streams of constant humidity unless precautionary criteria are followed to ensure source stability. (See Section .)
1.5ï¿½The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6ï¿½Warningâ€”Saturated salt solutions are extremely corrosive, and care should be taken in their preparation and handling. There is also the possibility of corrosive vapors in the atmospheres over the saturated salt solutions.1.7ï¿½This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For more specific safety precautionary information see and .
1.8ï¿½This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
|2. Referenced Documents|
Do you want to make sure you use only the valid technical standards?
We can offer you a solution which will provide you a monthly overview concerning the updating of standards which you use.
Would you like to know more? Look at this page.
Latest update: 2021-04-12 (Number of items: 2 440 772)
© Copyright 2021 NORMSERVIS s.r.o.