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The hydrometer sinks deeper in low-density liquids such as kerosene, gasoline, and alcohol, and less deep in high-density liquids such as brine, milk, and acids. It is usual for hydrometers to be used with dense liquids to have the mark 1.000 (for water) near the top of the stem, and those for use with lighter liquids to have 1.000 near the bottom.
At the bottom of the hydrometer is a weighted bulb and at the top is a pan for small weights. To use the hydrometer, one first accurately determines its weight (W) while it is dry. Next, the device is placed in water, and a weight (w) sufficient to sink a marked point on the rod to the water-line is placed on the pan.
Water meters are frequently installed in environments where they are exposed to rain, flooding, and dust, necessitating robust protection to maintain accurate and reliable operation. An IP68 rating indicates that a device is completely dust-tight and can withstand continuous immersion in water beyond 1 meter depth, as specified by the manufacturer.
When converting oil density to specific gravity using the above definition, it is important to use the correct density of water, according to the standard conditions used when the measurement was made. The official density of water at 60 °F according to the 2008 edition of ASTM D1250 is 999.016 kg/m 3. [2] The 1980 value is 999.012 kg/m 3. [3]
Parshall flumes (right) alongside other types of flow meters The Parshall flume is an open channel flow-metering device that was developed to measure the flow of surface water and irrigation flow. The Parshall flume is a modified version of the Venturi flume .
Tesla stock fell as the stock's post-election gains faded amid a cooling of the Trump trade and a new report from Reuters that suggested EV tax credits could be cut under the incoming Trump ...
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