How do you fill a mercury barometer?
How do you fill a mercury stick barometer? Fill the barometer tube with mercury, holding it over the tray throughout. (An easy technique for this is to pour mercury into the tube, using the funnel and a 5 cm length of rubber tubing, until it is nearly full, all but 2 cm at the open end. Close that end with a finger.
How do you get air bubbles out of a mercury barometer?
Turn the tube upside down and “pump, jiggle or gently tap” the tube on a hard surface. The mercury will push pas the air locks, forcing them upward towards the open end of the tube. 3. When all the air is out or near the bend in the tube, invert the tube to its normal position.
Can I buy mercury for my barometer?
Old, contaminated mercury that may have been in the barometers is collected and recycled through a mercury processing company. No mercury is lost or discarded from my shop. There is no federal government restriction on buying mercury.
How do I know if my barometer is broken?
Hold the instrument at the 45-degree angle and check the the level of the mercury in the glass tube with a long “stick” barometer. If the barometer is working correctly, the mercury inside will rise quickly to fill the very tip of the tube, leaving no air bubble.
What keeps mercury inside the tube in a mercury barometer?
Explanation: Atmospheric pressure will support a column of mercury 760 mm high.
How do stick barometers work?
How do barometers work? A mercury or Torricellian barometer features a glass container filled with mercury. Simply put, at sea level, as air temperature rises, there is an increase in pressure within the container, which causes the mercury level to rise.
Why has my barometer stopped working?
Check the adjusting or transporting screw at the base of the barometer. If it is screwed too tightly the adjusting screw will prevent the mercury from falling when pressure falls, and only works when pressure increases. Remove the complete glasswork of a broken tube.
How much does a good barometer cost?
The majority of barometers cost between $10 for basic digital models to $50 for large dial-type barometers. However, some ornate options can cost $200 or more.
Can my barometer be repaired at the clock shop?
Sutton Clock Shop repairs all types of Barometers including Aneroid Barometers as well as Mercurial Barometers. Barometer repairs that require tube replacements of any size will be handled by a specialist who hand blows class tubes.
What is a complete restoration of a barometer?
A complete restoration would consist of placing the barometer in the condition it was the day it was made. This would include stripping the case, and refinishing, re-lettering or filling the dial engravings resilvering the dial and scales, replacing the barometer mercury tube (if equipped) and calibrating the instrument.
Do you provide full service for aneroid barometers?
Although most of the work we perform is on mercury barometers (both wheel and stick) we can also provide full service to aneroid barometers. If you are not sure which type of barometer you have you can go to myfrequently asked questionspage to hopefully get an answer.
What is the difference between an aneroid and mercury barometer?
Both aneroid and mercury barometers need to be calibrated from time to time. Aneroid type can easily be adjusted buy the owner but mercury barometers require the draining and refilling of the mercury tube, usually with new mercury. These tubes can be filled using a capillary tube or a vacuum pump.