A Simple P/T Aerometer
Abstract
There are numerous situations in which a knowledge of the density of ambient air is more useful than a simple measurement of barometric pressure. By application of the gas laws a commercial diaphragm-type absolute pressure indicator can be converted into an instrument giving a direct indication of air density. This can be done by simply filling the normally evacuated chamber with dry air and sealing it under conditions such that the pointer indicates the density of ambient air at the time of sealing. The range of densities covered in a given instrument would depend on the dimensions of the chamber and the mechanical properties of the diaphragm. The principles were put into practice using a commercial instrument, and the converted instrument gives accurate, reproducible results with a response time comparable to that of a mercury-in-glass thermometer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 14, 1958
- Accession Number
- AD1224507
Entities
People
- Clarke C. Minter
Organizations
- United States Naval Research Laboratory