Aneroid Sphygmo
Aneroid sphygmo is abbreviation of aneroid sphygmomanometer, which is mechanical type of blood pressure measuring device.Gauge shell of standard aneroid sphygmo is normally made of zinc alloy. Sometimes aluminum alloy is adopted.
Description
Characteristics of aneroid sphygmo:
Aneroid sphygmo comprises of aneroid gauge, bladder, cuff and bulb.Batteries are not needed. Although it seems not be as convenient as digital blood pressure monitor, it is still dependable and economic medical device to test blood pressure.
Zinc alloy is often used in making the shell of aneroid gauge shell.
Why does the gauge case of the mechanical sphygmomanometer mostly use zinc alloy?
Zinc alloy is an alloy composed of other elements based on zinc. The alloy elements often added are aluminum, copper, magnesium, cadmium, lead and titanium. Zinc alloy has low melting point, good fluidity, easy melting and welding, brazing and plastic processing, corrosion resistance in the atmosphere, waste materials easy to recycle and remelt.It is prepared by melting process and die casting or press processing.
According to the manufacturing technology, it can be divided into cast zinc alloy and deformed zinc alloy. Zinc alloys can be divided into deformation and casting zinc alloys according to processing technology. Cast zinc alloys have good fluidity and corrosion resistance, and are suitable for die-casting instruments, automotive parts and shells.
The shell of the sphygmomanometer is made of cast zinc alloy. It is corrosion resistant, stable and easy to process.
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