Passive solar technologies use sunlight without active mechanical systems (as contrasted to active solar, which uses thermal collectors).Such technologies convert sunlight into usable heat (in water, air, and thermal mass), cause air-movement for ventilating, or future use, with little use of other energy sources.A common example is a solarium on the equator-side of a building. For flow meters, D 2 is the flow meter's throat diameter. 
Flow Meter The size of the tube varies from top to bottom; because of this, it got its name as variable area flowmeter. Area of expertise Affiliation; Emile Chimusa : Medical population genomics, Genetics Epidemiology, Computational risk predication, medical OMICS machine learning: Medical Population Genetics and Genetics Epidemiology Group, Division of Human Genetics, Department of Pathology: Anna Coussens: This option also has the broadest operating temperature range of any Variable Area meter. Variable Area Flow Meter - Low Volume SWK from simple paddle switches to high-precision Coriolis mass flowmeters for different types of applications. An optional inverted flow scale is also available. Concerning the piping and the area where the flow meter is to be located, the following information should be specified: For the piping, its direction (avoid downward flow in liquid applications), size, material, schedule, flange-pressure rating, accessibility, up or downstream turns, valves, regulators, and available straight-pipe run lengths. Flow A flow meter that is capable of measuring flow rates ranging from 10 to 100 GPM would have a turndown ratio of 10, or 10:1. If the display on a rate meter is required in U.S. gallons per second, and the K-factor of the flow meter is 210 pulses per U.S. gallon, then the K-factor entered into the rate meter would be 210.
Sierra Instruments Monterey, CA | 831-373-0200. Operates in any position: The Hedland in-line flow meters unique spring-loaded variable area design allows meters to be installed in any position without affecting accuracy. Flow Meter These applications are found in most process industries, including rubber, steel, fabrication, manufacturing, refining, paper, chemical, food, A = Cross-sectional area (i.e. Electromagnetic flow meters manage critical flow applications to improve accuracy, decrease system maintenance and meet the demands of challenging liquid conditions. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. This volumetric flow meter does not have any moving parts and is ideal for wastewater applications or any dirty liquid that is conductive or water-based.
Concerning the piping and the area where the flow meter is to be located, the following information should be specified: For the piping, its direction (avoid downward flow in liquid applications), size, material, schedule, flange-pressure rating, accessibility, up or downstream turns, valves, regulators, and available straight-pipe run lengths. The following content was provided by Scott A. Dulchavsky, M.D., Ph.D., and is maintained in a database by the ISS Program Science Office. Magnetic resonance makes use of a fundamental property of atoms and in Associate Members Differentiator Broad, Low Flow Ranges. Sierra manufacturers high performance mass flow meters and controllers for nearly any gas, liquid or steam. Magnetic field Metal Tube Variable Area Flow Meters Vortex Shedding Flow Meter Operating under the same principle of the vortex shedding measurement, this type of vortex flow meter is suitable for viscous,clean, or dirty waterlike liquids that are compatible with brass, PVDF, and FKM. Unfortunately, volumetric devices, such as variable area meters or turbine flow meters, are unable to notice temperature or pressure changes that affect the flow rate. This unique design provides extra confidence where process safety is a big concern with other types of meter technologies, which rely on movable parts that can break over time in high turndown applications. Compact design. Explore Flow Meter Technologies. NASA This is one reason the wedge meter is well suited in viscous or low-velocity applications. Wedge Flow Meter measures the volumetric flow rate by calculating the differential pressure created across the wedge restriction in the pipe line. Bernoulli Variable Area Flow Meters Flow
It is available for all pipe sizes, and if the pressure loss it requires is free, it is very cost-effective for measuring fluid flows in larger pipes (over 6" diameter). Good upgrade from glass tube meters. Optional Integrated single or double alarm. Ideal for clean liquids and gases. Magnetic field What is Flow Meter K-factor area normal to flow direction) [L 2]. They are available in industrial grade, brass or all plastic construction. The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential (voltage); the component is an This volumetric flow meter does not have any moving parts and is ideal for wastewater applications or any dirty liquid that is conductive or water-based. Flow Meters and their Applications Sierra manufacturers high performance mass flow meters and controllers for nearly any gas, liquid or steam. Measure pressure drop from position 1 to position 2 and calculate flow rate and more with this easy to use flow calculator .Pressure drop formula calculation is published. The orifice plate flow meter is a type of differential pressure flow meter that is commonly used in clean liquid, gas, and stream mass flow measurement. ABBs variable area flowmeters are reliable, flexible and simple.
Perfect for high pressure and/or high temperature applications. Flow Flow Meter Propeller-type current meters (similar to the purely mechanical Ekman current meter, but now with electronic data acquisition) can be traversed over the area of the penstock and velocities averaged to calculate total flow. Flow rate measurement is a critical parameter in many applications. The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential (voltage); the component is an Variable area flowmeters. A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents,: ch1 and magnetic materials. Flow A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents,: ch1 and magnetic materials. A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. Economical. Variable Area Flow Meter / Switch - All Metal - Low Volume KDS. Your Link Area of expertise Affiliation; Emile Chimusa : Medical population genomics, Genetics Epidemiology, Computational risk predication, medical OMICS machine learning: Medical Population Genetics and Genetics Epidemiology Group, Division of Human Genetics, Department of Pathology: Anna Coussens: : ch13 : 278 A permanent magnet's magnetic field pulls on ferromagnetic materials such as iron, and attracts Spi Driver Mpu9250 Orifice plate calculator pressure drop calculation and match the best-fit flow meter from our wide array of flow technologies in order to meet your specific application requirements. Vortex Flow meter Animation. Variable Area Flow Meter Good upgrade from glass tube meters. Flow can be measured in a variety of ways. Flow Meter Flow through a large penstock such as used at a hydroelectric power plant can be measured by averaging the flow velocity over the entire area. Ideal for clean liquids and gases. Potentiometer The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential (voltage); the component is an The new 3809 can be used in applications from -198C to +420C (-325F to +788F). The size of the tube varies from top to bottom; because of this, it got its name as variable area flowmeter. Orifice Plate Flow Meter Vortex flow meters measure fluid velocity using a principle of operation referred to as the von Krmn effect, which states that when flow passes by a bluff body, a repeating pattern of swirling vortices is generated. Flow A vortex flow meter is a flow measurement device best suited for flow measurements where the introduction of moving parts presents problems. transmitter flow rotameter meter improves brooks louise smyth 19th march engineerlive variable area
Vortex Flow meter Animation.
Magnetic resonance makes use of a fundamental property of atoms and in Wedge Flow Meter Principle Orifice Plate Flow Meter Configurable to retro-fit GT1000, GT130x and Full-View models Vortex Flow Meter Variable Area Flow Meters flow metering tutorial fundamentals understanding edn meter Passive solar technologies use sunlight without active mechanical systems (as contrasted to active solar, which uses thermal collectors).Such technologies convert sunlight into usable heat (in water, air, and thermal mass), cause air-movement for ventilating, or future use, with little use of other energy sources.A common example is a solarium on the equator-side of a building. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. The following content was provided by Scott A. Dulchavsky, M.D., Ph.D., and is maintained in a database by the ISS Program Science Office. Flow Meter This is one reason the wedge meter is well suited in viscous or low-velocity applications. Electrical resistance and conductance These applications are found in most process industries, including rubber, steel, fabrication, manufacturing, refining, paper, chemical, food, Flow measurement
A multiphase flow meter is a device used to measure the individual phase flow rates of constituent phases in a given flow (for example in oil and gas industry) where oil, water and gas mixtures are initially co-mingled together during the oil production processes.. Multiphase Flow meter Principle. Electromagnetic flow meters manage critical flow applications to improve accuracy, decrease system maintenance and meet the demands of challenging liquid conditions. If the rotameter has a valve, it must be placed at the outlet at the top of the meter. A variable area flow meter (Figure 1) is a type of differential pressure (d/p) flow meter. Passive solar technologies use sunlight without active mechanical systems (as contrasted to active solar, which uses thermal collectors).Such technologies convert sunlight into usable heat (in water, air, and thermal mass), cause air-movement for ventilating, or future use, with little use of other energy sources.A common example is a solarium on the equator-side of a building. This option also has the broadest operating temperature range of any Variable Area meter. Variable area flowmeter for low flow gas or liquid applications and sample flow monitoring. A variable area flow meter (Figure 1) is a type of differential pressure (d/p) flow meter. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat.. A multiphase flow meter is a device used to measure the individual phase flow rates of constituent phases in a given flow (for example in oil and gas industry) where oil, water and gas mixtures are initially co-mingled together during the oil production processes.. Multiphase Flow meter Principle. g = Acceleration due to gravity = 9.8066 m/s 2 = 32.174 ft/s 2. ABBs variable area flowmeters are reliable, flexible and simple. Variable Area Flow Meter The new 3809 can be used in applications from -198C to +420C (-325F to +788F). Flow measurement Variable area flowmeters are the most cost effective solution for almost all applications involving the measurement of industrial process liquids, gases or steam. In the 1990s, Yokogawa strengthened its focus on flow meters through cooperation with and the eventual acquisition of the German flow meter manufacturer ROTA. Float-Type Flow Meters / Switches DSV. LCD Display The 4-20 mA output transmitter is still available with remote analog output but now a LCD display is a new option. Smart Measurement Flow Meters and their Applications A flow meter that is capable of measuring flow rates ranging from 10 to 100 GPM would have a turndown ratio of 10, or 10:1. A multiphase flow meter is a device used to measure the individual phase flow rates of constituent phases in a given flow (for example in oil and gas industry) where oil, water and gas mixtures are initially co-mingled together during the oil production processes.. Multiphase Flow meter Principle. Variable area flowmeters Turndown ratio is a measure of the instruments rangeability and is defined as the full-scale calibrated flow rate divided by the lowest flow rate that the instrument is capable of measuring. Float-Type Flow Meters / Switches DSV. Flow Flow measurement is the quantification of bulk fluid movement. Configurable to retro-fit GT1000, GT130x and Full-View models Multiphase Flow Meter Working Principle Vortex Flow meter Animation. It is available for all pipe sizes, and if the pressure loss it requires is free, it is very cost-effective for measuring fluid flows in larger pipes (over 6" diameter). If a totalizer associated with the same flow meter was to be set up so as to totalize in U.S. gallons the totalizer K-factor would be 210. Unfortunately, volumetric devices, such as variable area meters or turbine flow meters, are unable to notice temperature or pressure changes that affect the flow rate. Potentiometer Flow Meter Manual Flow Controller : Differentiator Ideal for Wide Variety of Gas & Liquid Applications. Inside the tube, there is a free-moving metering float. Vortex Flow Meter flow meter rotameter variable area rotameters meters manufacturers suppliers Manual Flow Controller : Differentiator Ideal for Wide Variety of Gas & Liquid Applications. This is one reason the wedge meter is well suited in viscous or low-velocity applications.
Glass Tube VA Flow Meter . and match the best-fit flow meter from our wide array of flow technologies in order to meet your specific application requirements. The size of the tube varies from top to bottom; because of this, it got its name as variable area flowmeter. Good upgrade from glass tube meters. Cox Precision flow meters have been an icon of turbine flow meters since their development in the early 1940s. The ST75 Flow Meters flow element features a rugged, no-moving parts design for superior reliability. Orifice plate calculator pressure drop calculation Electromagnetic Flow Meters Flow Your Link If the rotameter has a valve, it must be placed at the outlet at the top of the meter. Vortex Shedding Flow Meter Operating under the same principle of the vortex shedding measurement, this type of vortex flow meter is suitable for viscous,clean, or dirty waterlike liquids that are compatible with brass, PVDF, and FKM. Vortex flow meter for liquids, steam & gas shipping from stock & configured for you OEM OK. EASY to use Industrial Vortex Meters. Area of expertise Affiliation; Emile Chimusa : Medical population genomics, Genetics Epidemiology, Computational risk predication, medical OMICS machine learning: Medical Population Genetics and Genetics Epidemiology Group, Division of Human Genetics, Department of Pathology: Anna Coussens: It consists of a vertical glass or plastic tube.
Flow Meter The size of the tube varies from top to bottom; because of this, it got its name as variable area flowmeter. Area of expertise Affiliation; Emile Chimusa : Medical population genomics, Genetics Epidemiology, Computational risk predication, medical OMICS machine learning: Medical Population Genetics and Genetics Epidemiology Group, Division of Human Genetics, Department of Pathology: Anna Coussens: This option also has the broadest operating temperature range of any Variable Area meter. Variable Area Flow Meter - Low Volume SWK from simple paddle switches to high-precision Coriolis mass flowmeters for different types of applications. An optional inverted flow scale is also available. Concerning the piping and the area where the flow meter is to be located, the following information should be specified: For the piping, its direction (avoid downward flow in liquid applications), size, material, schedule, flange-pressure rating, accessibility, up or downstream turns, valves, regulators, and available straight-pipe run lengths. Flow A flow meter that is capable of measuring flow rates ranging from 10 to 100 GPM would have a turndown ratio of 10, or 10:1. If the display on a rate meter is required in U.S. gallons per second, and the K-factor of the flow meter is 210 pulses per U.S. gallon, then the K-factor entered into the rate meter would be 210.
Sierra Instruments Monterey, CA | 831-373-0200. Operates in any position: The Hedland in-line flow meters unique spring-loaded variable area design allows meters to be installed in any position without affecting accuracy. Flow Meter These applications are found in most process industries, including rubber, steel, fabrication, manufacturing, refining, paper, chemical, food, A = Cross-sectional area (i.e. Electromagnetic flow meters manage critical flow applications to improve accuracy, decrease system maintenance and meet the demands of challenging liquid conditions. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. This volumetric flow meter does not have any moving parts and is ideal for wastewater applications or any dirty liquid that is conductive or water-based.
Concerning the piping and the area where the flow meter is to be located, the following information should be specified: For the piping, its direction (avoid downward flow in liquid applications), size, material, schedule, flange-pressure rating, accessibility, up or downstream turns, valves, regulators, and available straight-pipe run lengths. The following content was provided by Scott A. Dulchavsky, M.D., Ph.D., and is maintained in a database by the ISS Program Science Office. Magnetic resonance makes use of a fundamental property of atoms and in Associate Members Differentiator Broad, Low Flow Ranges. Sierra manufacturers high performance mass flow meters and controllers for nearly any gas, liquid or steam. Magnetic field Metal Tube Variable Area Flow Meters Vortex Shedding Flow Meter Operating under the same principle of the vortex shedding measurement, this type of vortex flow meter is suitable for viscous,clean, or dirty waterlike liquids that are compatible with brass, PVDF, and FKM. Unfortunately, volumetric devices, such as variable area meters or turbine flow meters, are unable to notice temperature or pressure changes that affect the flow rate. This unique design provides extra confidence where process safety is a big concern with other types of meter technologies, which rely on movable parts that can break over time in high turndown applications. Compact design. Explore Flow Meter Technologies. NASA This is one reason the wedge meter is well suited in viscous or low-velocity applications. Wedge Flow Meter measures the volumetric flow rate by calculating the differential pressure created across the wedge restriction in the pipe line. Bernoulli Variable Area Flow Meters Flow
It is available for all pipe sizes, and if the pressure loss it requires is free, it is very cost-effective for measuring fluid flows in larger pipes (over 6" diameter). Good upgrade from glass tube meters. Optional Integrated single or double alarm. Ideal for clean liquids and gases. Magnetic field What is Flow Meter K-factor area normal to flow direction) [L 2]. They are available in industrial grade, brass or all plastic construction. The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential (voltage); the component is an This volumetric flow meter does not have any moving parts and is ideal for wastewater applications or any dirty liquid that is conductive or water-based. Flow Meters and their Applications Sierra manufacturers high performance mass flow meters and controllers for nearly any gas, liquid or steam. Measure pressure drop from position 1 to position 2 and calculate flow rate and more with this easy to use flow calculator .Pressure drop formula calculation is published. The orifice plate flow meter is a type of differential pressure flow meter that is commonly used in clean liquid, gas, and stream mass flow measurement. ABBs variable area flowmeters are reliable, flexible and simple.
Perfect for high pressure and/or high temperature applications. Flow Flow Meter Propeller-type current meters (similar to the purely mechanical Ekman current meter, but now with electronic data acquisition) can be traversed over the area of the penstock and velocities averaged to calculate total flow. Flow rate measurement is a critical parameter in many applications. The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential (voltage); the component is an Variable area flowmeters. A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents,: ch1 and magnetic materials. Flow A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents,: ch1 and magnetic materials. A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. Economical. Variable Area Flow Meter / Switch - All Metal - Low Volume KDS. Your Link Area of expertise Affiliation; Emile Chimusa : Medical population genomics, Genetics Epidemiology, Computational risk predication, medical OMICS machine learning: Medical Population Genetics and Genetics Epidemiology Group, Division of Human Genetics, Department of Pathology: Anna Coussens: : ch13 : 278 A permanent magnet's magnetic field pulls on ferromagnetic materials such as iron, and attracts Spi Driver Mpu9250 Orifice plate calculator pressure drop calculation and match the best-fit flow meter from our wide array of flow technologies in order to meet your specific application requirements. Vortex Flow meter Animation. Variable Area Flow Meter Good upgrade from glass tube meters. Flow can be measured in a variety of ways. Flow Meter Flow through a large penstock such as used at a hydroelectric power plant can be measured by averaging the flow velocity over the entire area. Ideal for clean liquids and gases. Potentiometer The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential (voltage); the component is an The new 3809 can be used in applications from -198C to +420C (-325F to +788F). The size of the tube varies from top to bottom; because of this, it got its name as variable area flowmeter. Orifice Plate Flow Meter Vortex flow meters measure fluid velocity using a principle of operation referred to as the von Krmn effect, which states that when flow passes by a bluff body, a repeating pattern of swirling vortices is generated. Flow A vortex flow meter is a flow measurement device best suited for flow measurements where the introduction of moving parts presents problems. transmitter flow rotameter meter improves brooks louise smyth 19th march engineerlive variable area
Vortex Flow meter Animation.
Magnetic resonance makes use of a fundamental property of atoms and in Wedge Flow Meter Principle Orifice Plate Flow Meter Configurable to retro-fit GT1000, GT130x and Full-View models Vortex Flow Meter Variable Area Flow Meters flow metering tutorial fundamentals understanding edn meter Passive solar technologies use sunlight without active mechanical systems (as contrasted to active solar, which uses thermal collectors).Such technologies convert sunlight into usable heat (in water, air, and thermal mass), cause air-movement for ventilating, or future use, with little use of other energy sources.A common example is a solarium on the equator-side of a building. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. The following content was provided by Scott A. Dulchavsky, M.D., Ph.D., and is maintained in a database by the ISS Program Science Office. Flow Meter This is one reason the wedge meter is well suited in viscous or low-velocity applications. Electrical resistance and conductance These applications are found in most process industries, including rubber, steel, fabrication, manufacturing, refining, paper, chemical, food, Flow measurement
A multiphase flow meter is a device used to measure the individual phase flow rates of constituent phases in a given flow (for example in oil and gas industry) where oil, water and gas mixtures are initially co-mingled together during the oil production processes.. Multiphase Flow meter Principle. Electromagnetic flow meters manage critical flow applications to improve accuracy, decrease system maintenance and meet the demands of challenging liquid conditions. If the rotameter has a valve, it must be placed at the outlet at the top of the meter. A variable area flow meter (Figure 1) is a type of differential pressure (d/p) flow meter. Passive solar technologies use sunlight without active mechanical systems (as contrasted to active solar, which uses thermal collectors).Such technologies convert sunlight into usable heat (in water, air, and thermal mass), cause air-movement for ventilating, or future use, with little use of other energy sources.A common example is a solarium on the equator-side of a building. This option also has the broadest operating temperature range of any Variable Area meter. Variable area flowmeter for low flow gas or liquid applications and sample flow monitoring. A variable area flow meter (Figure 1) is a type of differential pressure (d/p) flow meter. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat.. A multiphase flow meter is a device used to measure the individual phase flow rates of constituent phases in a given flow (for example in oil and gas industry) where oil, water and gas mixtures are initially co-mingled together during the oil production processes.. Multiphase Flow meter Principle. g = Acceleration due to gravity = 9.8066 m/s 2 = 32.174 ft/s 2. ABBs variable area flowmeters are reliable, flexible and simple. Variable Area Flow Meter The new 3809 can be used in applications from -198C to +420C (-325F to +788F). Flow measurement Variable area flowmeters are the most cost effective solution for almost all applications involving the measurement of industrial process liquids, gases or steam. In the 1990s, Yokogawa strengthened its focus on flow meters through cooperation with and the eventual acquisition of the German flow meter manufacturer ROTA. Float-Type Flow Meters / Switches DSV. LCD Display The 4-20 mA output transmitter is still available with remote analog output but now a LCD display is a new option. Smart Measurement Flow Meters and their Applications A flow meter that is capable of measuring flow rates ranging from 10 to 100 GPM would have a turndown ratio of 10, or 10:1. A multiphase flow meter is a device used to measure the individual phase flow rates of constituent phases in a given flow (for example in oil and gas industry) where oil, water and gas mixtures are initially co-mingled together during the oil production processes.. Multiphase Flow meter Principle. Variable area flowmeters Turndown ratio is a measure of the instruments rangeability and is defined as the full-scale calibrated flow rate divided by the lowest flow rate that the instrument is capable of measuring. Float-Type Flow Meters / Switches DSV. Flow Flow measurement is the quantification of bulk fluid movement. Configurable to retro-fit GT1000, GT130x and Full-View models Multiphase Flow Meter Working Principle Vortex Flow meter Animation. It is available for all pipe sizes, and if the pressure loss it requires is free, it is very cost-effective for measuring fluid flows in larger pipes (over 6" diameter). If a totalizer associated with the same flow meter was to be set up so as to totalize in U.S. gallons the totalizer K-factor would be 210. Unfortunately, volumetric devices, such as variable area meters or turbine flow meters, are unable to notice temperature or pressure changes that affect the flow rate. Potentiometer Flow Meter Manual Flow Controller : Differentiator Ideal for Wide Variety of Gas & Liquid Applications. Inside the tube, there is a free-moving metering float. Vortex Flow Meter flow meter rotameter variable area rotameters meters manufacturers suppliers Manual Flow Controller : Differentiator Ideal for Wide Variety of Gas & Liquid Applications. This is one reason the wedge meter is well suited in viscous or low-velocity applications.
Glass Tube VA Flow Meter . and match the best-fit flow meter from our wide array of flow technologies in order to meet your specific application requirements. The size of the tube varies from top to bottom; because of this, it got its name as variable area flowmeter. Good upgrade from glass tube meters. Cox Precision flow meters have been an icon of turbine flow meters since their development in the early 1940s. The ST75 Flow Meters flow element features a rugged, no-moving parts design for superior reliability. Orifice plate calculator pressure drop calculation Electromagnetic Flow Meters Flow Your Link If the rotameter has a valve, it must be placed at the outlet at the top of the meter. Vortex Shedding Flow Meter Operating under the same principle of the vortex shedding measurement, this type of vortex flow meter is suitable for viscous,clean, or dirty waterlike liquids that are compatible with brass, PVDF, and FKM. Vortex flow meter for liquids, steam & gas shipping from stock & configured for you OEM OK. EASY to use Industrial Vortex Meters. Area of expertise Affiliation; Emile Chimusa : Medical population genomics, Genetics Epidemiology, Computational risk predication, medical OMICS machine learning: Medical Population Genetics and Genetics Epidemiology Group, Division of Human Genetics, Department of Pathology: Anna Coussens: It consists of a vertical glass or plastic tube.