Description: Perfect for a calibration bench or high accuracy application. This particular gauge was formerly in USAF service. An incredible feat of engineering and one of the most beautiful pieces of functional mechanical art I have ever seen. 12" Porcelain Face15" Total Diameter - Aluminum Bezel7" Deep800 individual hashes at 1mm HG incrementsWeighs in at over 20 Lbs One of the most unique and sophisticated pressure sensors is the fused quartz bourdon tube or capsule. The fused quartz bourdon tube should not be confused with the quartz resonator pressure sensors, which use quartz crystal and are currently designed and marketed by companies such as Paroscientific and Quartzdyne. Fused quartz tubing is manufactured by melting naturally occurring high purity quartz crystals at approximately 2000°C and then extruding the melted quartz into various diameters and wall thicknesses. This type of tubing is transparent and looks almost like glass. Some of the early development of the quartz bourdon can be traced back to Sam Worden, who was most noted for his pioneering work in gravimeters. The Worden Gravity Meter has the capability of measuring relative gravity to 1 part in 100,000,000 or a difference in elevation of only 1 inch. Before Sam Worden started fabricating quartz bourdon tubes for Worden for Ruska Instruments (early 1960’s) Why fused quartz? Many would ask why fused quartz was chosen to be a pressure sensing element. Dating back to the use of fused quartz in gravimeters, it was well known that it made an almost perfect spring material. Since fused quartz had a very low coefficient of thermal expansion, low thermoelastic modulus and low internal viscosity the “stage was set” to use fused quartz as the break through bourdon material.
Price: 400 USD
Location: Broomfield, Colorado
End Time: 2024-07-21T16:38:15.000Z
Shipping Cost: 0 USD
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Item Specifics
All returns accepted: ReturnsNotAccepted
Type: Vacuum Gauge
Brand: Ruska
