ID:
463
Maker's Name:
unknown
Dimensions:
11 × 10.5 × 29.5 cm
A Bourdon style pressure gauge with no dial, allowing the mechanism to be observed. A flattened tube curved into a semicircle tend to straighten when the pressure inside is raised, or to curve more tightly when pressure falls.
A lever and rack-and-pinion magnifies the motion at the indicator needle.
A scale of 10-0-10 allows a reading of pressure or vacuum (not calibrated).
