ASTM D4230
Standard Test Method for Measuring Humidity with Cooled-Surface Condensation (Dew-Point) Hygrometer
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About This Item
ASTM D4230 is the ASTM standard for measuring humidity with a cooled-surface condensation, or dew-point, hygrometer. It provides a defined test method for assessing moisture in a way that supports consistent measurement and comparison across applications. Because humidity can affect product quality, process stability, and environmental control, this standard matters for users who need a dependable technical reference for dew-point based measurement and evaluation.
What is ASTM D4230?
This standard, titled Standard Test Method for Measuring Humidity with Cooled-Surface Condensation (Dew-Point) Hygrometer, describes a method centered on dew-point measurement using a cooled-surface condensation hygrometer. In practical terms, it helps establish a common approach for determining humidity under controlled conditions. ASTM D4230 is useful when a precise, repeatable method is needed to support testing, calibration-related work, or technical comparisons involving moisture content in air or similar gas environments.
Where is ASTM D4230 used?
ASTM D4230 is commonly used in laboratory and quality control settings where humidity measurement must be reliable and traceable to a recognized ASTM standard. It may be applied in environmental testing, instrumentation work, and processes that depend on controlled moisture conditions. The standard is especially relevant for operations using dew-point hygrometers, where measured humidity values are used to verify performance, support product evaluation, or maintain stable conditions during testing and production.
Why is ASTM D4230 important?
ASTM D4230 helps promote consistency in how humidity is measured with a cooled-surface condensation hygrometer. That consistency supports better comparisons between tests, more dependable quality control decisions, and clearer procurement or compliance requirements. For organizations that depend on moisture-sensitive measurements, using a recognized ASTM test method can reduce ambiguity and improve confidence in reported humidity values. ASTM D4230 is therefore a practical reference for controlled measurement and technical evaluation.
- Dew-point hygrometer measurement method
- Humidity testing and evaluation
- Controlled laboratory and quality control use
- Repeatable technical reference for moisture measurement
- Publication Date: 2020-04-14
- Publisher: ASTM
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