aneroid

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aneroid

[′an·ə‚rȯid]
(engineering)
Containing no liquid or using no liquid.

aneroid

aneroid
A thin, disc-shaped box or capsule, usually metallic, partially evacuated of air and sealed, which expands and contracts with changes in atmospheric or gaseous pressure. The aneroid is the sensing and actuating element in various meters or gages, such as barometers, altimeters, and manifold-pressure gages. It is also the triggering or operating element in various automatic mechanisms. A device similar to an aneroid but open to outside pressures, such as the capsule in an air-speed indicator, is not commonly called an aneroid.
References in periodicals archive ?
The example shown here is one of these banjo aneroid barometers, dating to the late 19th/early 20th century.
Aneroid manometers (Aneroid) consist of a portable or wall-mounted unit that contains springs and other mechanical parts.
Patient positioning and cuff placement are the same as for the mercury and aneroid methods.
Automated wrist BP devices consist of a portable unit that uses oscillometrics to determine BP taken from the wrist, unlike the mercury, aneroid, and automated arm manometers.
For the mercury, aneroid, and arm monitors, the patient should be asked to roll up his/her sleeve so the cuff can be placed directly on the skin, with the bottom of the cuff one inch above the antecubital fossa (the inside crease of the patient's elbow).
When reading mercury column or aneroid manometers, operators tend to error by recording a zero as the last digit in the systolic and diastolic reading rather than the nearest 2 mmHg; for example, 116 becomes 120 or 74 is recorded as 70.3
According to the BHS, aneroid units should be calibrated with a mercury manometer biannually using Y-tubing (See Figure 5).
The Aneroid monitor was significantly more variable among those aged over 50 than for those 21 or younger, and the wrist monitor was significantly more variable for those over age 50 than for those 21-24.5 and from 24.5 to 50 years of age.