mercury tube

mercury tube

[′mər·kyə·rē ‚tüb]
References in periodicals archive ?
The flat, glazed body ncloses a fully visible, wide-bore mercury tube and cistern, behind which is a usually a porcelain register plate, although cheaper examples were printed on paper, inscribed with scale and markings.
The mercury tube is not the original and has been replaced, but it was clearly designed so the tubes could be taken out.
The barometer illustrated is of a type known as an Admiral Fitzroy barometer with a central mercury tube to measure the changes in atmospheric pressure, alcohol thermometer and hygrometer to measure humidity.
Unlike conventional UV lamps with mercury tubes, the LED-UV lamp built into the label printing machine consists of innumerable small LED panels arranged across the entire width in multiple rows.