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tachometer    
n. 转速计,流速计

转速计,流速计

tachometer
转速计

tachometer
*转速计

tachometer
n 1: measuring instrument for indicating speed of rotation [synonym:
{tachometer}, {tach}]

Hydrometer \Hy*drom"e*ter\, n. [Hydro-, 1 -meter: cf. F.
hydrom[`e]tre.]
1. (Physics) An instrument for determining the specific
gravities of liquids, and thence the strength spirituous
liquors, saline solutions, etc.
[1913 Webster]

Note: It is usually made of glass with a graduated stem, and
indicates the specific gravity of a liquid by the depth
to which it sinks in it, the zero of the scale marking
the depth to which it sinks in pure water. Extra
weights are sometimes used to adapt the scale to
liquids of different densities.
[1913 Webster]

2. An instrument, variously constructed, used for measuring
the velocity or discharge of water, as in rivers, from
reservoirs, etc., and called by various specific names
according to its construction or use, as {tachometer},
{rheometer}, {hydrometer}, {pendulum}, etc.; a current
gauge. Hydrometric


Tachometer \Ta*chom"e*ter\, n. [Gr. ta`chos swiftness, speed
(fr. tachy`s quick) -meter: cf. F. tachom[`e]tre.]
An instrument for measuring the velocity, or indicating
changes in the velocity, of a moving body or substance.
Specifically:
[1913 Webster]
(a) An instrument for measuring the velocity of running water
in a river or canal, consisting of a wheel with inclined
vanes, which is turned by the current. The rotations of
the wheel are recorded by clockwork.
[1913 Webster]
(b) An instrument for showing at any moment the speed of a
revolving shaft, consisting of a delicate revolving
conical pendulum which is driven by the shaft, and the
action of which by change of speed moves a pointer which
indicates the speed on a graduated dial.
[1913 Webster]
(c) (Physiol.) An instrument for measuring the velocity of
the blood; a haematachometer.
[1913 Webster]



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  • Tachometer - Wikipedia
    A tachometer (revolution-counter, tach, rev-counter, RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine [1] The device usually displays the revolutions per minute (RPM) on a calibrated analogue dial, but digital displays are increasingly common
  • Amazon. com: Tachometer
    NEIKO 20713A Digital Tachometer, Noncontact Laser Photo Sensor with 2 5 to 99,999 RPM Accuracy, RPM Gauge Marker with Batteries Included
  • What is a Tachometer? – Types, Working Principle - Inst Tools
    A tachometer is an instrument that is used to measure the speed of an object, mostly a motor It is majorly used to measure the rotational speed of the shaft or disc when the machine is in motion If the shaft is moving and when you touch the tachometer in conjunction with the shaft, the tachometer will show you the actual motor speed in RPM
  • Tachometer working principle and types - AutomationForum
    The tachometer precisely calculates the rpm by counting the number of pulses per unit of time This data is essential for tracking the speed and efficiency of engines Construction of tachometer The components of a tachometer include a dial, a needle (for reading indication), and high and low marks for safe and dangerous levels Types of
  • Tachometer: Uses, Types, Measurement Working - Tesca Global Blog
    There are several types of Tachometers, including mechanical, electronic, and magnetic A digital meter helps measure and indicate the speed of a rotating object It is an optical encoder that helps determine the velocity of the motor for the rotating shaft and is helpful in automobiles, medical instruments applications, and more
  • A Complete Guide to Tachometers - RS Components
    A tachometer is an instrument which measures the rotation speed of a shaft or disk It is designed to measure the revolutions per minute (RPM) of a moving object Tachometers are typically used in motors and other machines and are widely found in the automotive and aviation industries
  • How Does a Tachometer Work? | KUS Americas, Inc.
    How Does a Tachometer Work? A tachometer is an instrument that measures the working speed of an engine, typically in revolutions per minute (RPM) It is commonly used in cars, boats, planes, and other vehicles Most tachometer gauges have either an analog (dial) or digital (LCD or LED screen) display
  • What is a Tachometer? Types, Replacement Cost, and More
    The tachometer, also known as the “revolution rev counter” or tach, measures the engine’s revolutions per minute (RPM) or the number of times the crankshaft rotates every minute For automatic transmission vehicles, however, the tachometer has become an unnecessary gauge as shifting gears is computerized and requires no help from the driver
  • What is Tachometer and its Types? - ElectricalWorkbook
    Tachometer is defined as, “an instrument used to measure the angular velocity of shaft and express it in number of revolutions made per minute (in r p m ) ” It may continuously indicate the value of angular speed
  • Understanding Tachometers: Types, Costs, and Installation Guide
    A tachometer is an essential tool that precisely measures the rotation speed of a shaft or disk Its significance lies in providing real-time feedback on engine performance, making it an indispensable component in vehicles and machinery





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