Instruments for the detection and measurement of physical variables such as flow, pressure, temperature, humidity, velocity, acceleration, and vibration.

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Air Flow Sensors (269 suppliers)

Air velocity flow sensors measure air velocity or volume flow using insertion probes or capture hoods.
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Durometers (66 suppliers)

Durometers are instruments used for measuring the indentation hardness of rubber, elastomers, plastics and foam materials.
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Flame Detectors (179 suppliers)

Flame detectors monitor and analyze incoming radiation at selected wavelengths.
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Flow computers, totalizers, and rate indicators integrate the functions of flow and temperature measurement, computation, data acquisition, input / output (I/O) standardization, and closed loop control. They require external sensor inputs and may be used as local rate indicators.
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Flow Meters (1,660 suppliers)

Flow meters (flowmeters) and flow sensors are devices used for measuring the flow rate or quantity of a moving fluid or gas.
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Force and torque instruments are used to measure force, weight or torque. Some can measure force and torque by changing the sensor / transducer.
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Gas Flow Meters (426 suppliers)

Gas flow meters are used for measuring the flow or quantity of a moving gas in an enclosed pipe or passage.
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Gas Instruments (955 suppliers)

Gas instruments detect, monitor or analyze gases present in an environment.
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Hardness Testers (237 suppliers)

Hardness testers measure a material's resistance to indentation. This calculation is determined by measuring the permanent depth or projected area of the indentation.
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Hygrometers and humidity measurement instruments test for absolute humidity, relative humidity, or dew point in air.
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Laboratory Balances (253 suppliers)

Laboratory balances are used to measure an object’s mass to a very high degree of precision.
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Level Gauges (300 suppliers)

Level gauges are industrial meters used to determined the level of a liquid in a fixed storage or process tank
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Level Sensors (1,097 suppliers)

Level sensors are used to detect liquid or powder levels, or interfaces between liquids. There are two basic level-measurement types: continuous and point or multi-point.
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Liquid Flow Meters (606 suppliers)

Liquid flow meters are used to measure the volumetric flow rate or amount of a moving liquid.
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Liquid Leak Detectors (245 suppliers)

Liquid leak detectors sense when a liquid is leaking from a pipe, tank, or other receptacle.
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Load Cells (376 suppliers)

Load cells are force sensors that often incorporate mechanical packaging to fit into testing and monitoring systems. They can be used for tension, compression, and/or shear measurement, and can be configured to measure force or load along one or more axes. 
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Mass flow meters and controllers measure flow rate in units of mass or volume per units of time (e.g., pounds per minute). They are designed for use with gases, liquids, steams, or slurries. 
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Moisture Meters (797 suppliers)

Moisture meters are used to measure the moisture content in bulk solids, liquids and gases.
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Opacity sensors and instruments measure the amount of light transmitted through a sample.
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Paddlewheel flow meters have a paddle wheel that is perpendicular to the flow path. The rotor axis is positioned to limit contact between the paddles and the flowing media.
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Pressure Instruments (313 suppliers)

Pressure instruments are used to measure, monitor, record, transmit or control pressure.
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Pressure Sensors (1,085 suppliers)

Pressure sensors include all sensors, transducers and elements that produce an electrical signal proportional to pressure or changes in pressure.
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Radiation Detectors (205 suppliers)

Radiation detectors are used for medical diagnoses, radioactive dating measurements, and measurements of background radiation, activity levels and radiation doses.
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Refractometers (155 suppliers)

Refractometers measure the critical angle of refraction through a sample. The critical angle of refraction will change with concentration.
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Rheometers (71 suppliers)

Rheometers characterize a liquid according to its viscous properties and elastic responses.
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Rotameters (107 suppliers)

Rotameters are typically tapered glass tubes positioned vertically in the fluid flow. A float within the tube rides upward in relation to the amount of flow.
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Smoke Detectors (274 suppliers)

Smoke detectors are designed to sense the products of combustion. Common types include ionization chambers and photoelectric devices.
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Solids Flow Meters (33 suppliers)

Solids flow meters measure the flow rate of bulk solids, powders, grain, etc.
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Sound level meters and noise dosimeters are used in sound and noise analysis. Applications include industrial safety, traffic noise studies, and scientific noise measurement.
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Stroboscope instruments are used for inspection and observation of moving parts by freezing or slowing down the action of an object.
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Tachometers (347 suppliers)

Tachometers are used to measure the velocity of a rotating object. They operate on the principle that a driven motor (i.e., a motor operated as a generator) produces a voltage that is proportional to the angular velocity of the motor shaft.
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Temperature Indicators (474 suppliers)

Temperature indicators are designed for temperature monitoring and analysis. These devices either come equipped with an integral sensor, or require sensor input.
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Turbine Flow Meters (272 suppliers)

Turbine flow meters measure the rate of flow in a pipe or process line via a rotor that spins as the media passes through its blades.
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Ultrasonic Flow Meters (224 suppliers)

Ultrasonic flow meters use sound waves to determine flow rates. They can be either Doppler Effect meters or Time-of-Flight meters.
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Vibration measurement instruments and vibration analyzers are used for measuring, displaying and analyzing vibration. Typically these instruments comprise a transducer, data acquisition and either a local display or some sort of output to a computer or another instrument.
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Viscometers (178 suppliers)

Viscometers define viscous properties of a fluid at ambient or defined temperatures.
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Vortex Flow Meters (121 suppliers)

Vortex flow meters are flow sensors that detect the frequency of vortices shed by a bluff body placed in a flow stream. The frequency of the vortices is proportional to the flow velocity.
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