A PRECISION LIQUID MANOMETER,
Abstract
A high-accuracy liquid manometer was developed in which dibutylphthalate is used instead of mercury. The instrument is shown. It consists of a U-shaped tube, control scale, readout device, with magnifying glass. The right arm of the U-tube is evacuated to approximately 0.01 mm Hg. The vacuum is monitored by a thermocouple vacuum gauge. Since the density of dibutylphthalate is 13 times less than mercury, the accuracy of the read-out is approximately 10 times higher. The range of the instrument is 0-70 millibar. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 20, 1969
- Accession Number
- AD0694153
Entities
People
- S. I. Nepomnyashchii
Organizations
- National Air and Space Intelligence Center