Flow meters are used to measure the flow of air, fluids and gas. Some of the most popular flow meters are: peak flow meters, water flow meters, fuel flow meters, air flow meters, ultrasonic flow meters, and flow monitor services. Many flow meters measure the volume of the material while other flow meters measure the speed, and still other flow meters measure the mass of the materials. For the most part, flow meters are used to infer mass flow through calculations that flowmeter and flow monitor instruments make after taking various flow measurements such as absolute pressure, differential pressure, viscosity and temperature. Most flow meters including: peak flow meters, water flow meters, and fuel flow monitors, are made up of three parts: the primary device, transducer and transmitter. These three flowmeter parts are usually combined into one so that the flowmeter is only one instrument.

There are many different types of flow meters used for different measurements of flow. Thermal mass flow meters take measurements with two sensors that work together. A temperature sensor reference, and an active heated sensor take measurements by calculating how much heat loss occurs in the flowing liquid, and thus these flow meters can determine the flow rate based on this amount. Another type of flowmeter is the Coriolis mass flow meter, which operates on the basis of the Coriolis Effect. Basically, an excitation force is applied to the flowmeter tube, causing the fluid or gas to rotate because the acceleration is acting in opposite directions on both sides of the applied force. A flowmeter measurement can then be taken. Other kinds of flow meters operate using sound: these are called ultrasonic flow meters, and include several types like Doppler Effect flow meters and time-of-flight flow meters.

Because of their varied uses, flow meters are useful in a variety of fields. Medically, flow meters are used to measure a patients air intake. These types of flow meters are called peak flow meters and are particularly beneficial for asthma patients. In plumbing, water flow meters are used to measure the amount of fluid running through a tube for efficiency purposes. In general, flow meters are used in many industrial purposes for flow measurements to help companies determine profit gain or loss. Other industries that benefit from the use of flow meters, peak flow meters, fuel flow meters, water flow meters, and flow monitor services include the automotive industry, petroleum and gas industries, utility services, HVAC, food processing and raw materials industry.

Each type of flowmeter has specific guidelines that must be followed for proper use. For example, when using a gas flow meters, the flowmeter must remain full of gas. Liquid in gas flow meters can affect the flow meters accuracy. Similarly, in order for liquid flow meters to work properly, they must remain full of liquid. Gas in liquid flow meters can affect the accuracy of flowmeter readings. Generally, contaminants of any kind will cause an inaccurate reading of flow meters, so these flowmeter and flow monitor instruments must be treated with care and cleaned regularly.

Types of Flow Meters including: Peak Flow Meters, Water Flow Meters, Fuel Flow Meters, Flow Monitor, Flowmeter Companies, Flowmeters, Ultrasonic Flow Meters, Mass Flow Meters, Air Flow Meters, Air Flow Meters.

Coriolis mass flow meters are used to measure the force of acceleration resulting from a moving object towards or away from the center of rotation.

Differential pressure flow meters are used to measure the flow of fluids and gases in a pipe by introducing constriction that causes the flowmeter pressure to drop. These flow meters must be kept clean to result in accurate measurements.

Insertion flow meters measure flow at one position in a pipe, and then, based on the flowmeter measurement, these flow meters estimate the flow rate for the entire pipe.

Magnetic flow meters measure flow by creating a magnetic field that is channeled into the liquid and causes a voltage signal to be sensed that is proportional to the flow of liquid.

Mass flow meters are used to measure gas flow and are one of the more popular types of flow meters. This flowmeter is relatively unaffected by changes in temperature or pressure in the mass flow meters tubes or mass flow meters pipes.

Open channel flow meters are used to measure the flow of liquids when the channel flow meters are open to the atmosphere.

Peak flow meters are used by patients with asthma or other lung disorders to measure the amount of air patients take into their lungs. Peak flow meters allow physicians to further determine the severity of any illness.

Positive displacement flow meters trap liquid to measure its flow by rotating parts that move between seals and the flowmeter body.

Sight flow indicators allow the operator to view the liquid as it is moving. Some flow monitor and flow indicator models come equipped with lights to enhance the visibility of the fluids.

Target flow meters measure the amount of force that is exerted on a target in a particular liquid or gas. Readings from target flow meters should not be used to measure high viscosity liquids because the target can be damaged.

Thermal flow meters are flow meters that use thermal properties of fluids to measure the flow. Thermal flow meters are heated and as the liquid flows by, it can tell the flow rate by the amount of heat lost.

Turbine flow meters consist of a rotor that measures the fluid when it passes through the blades. The blade speed of turbine flow meters is then translated into the speed of the fluid.

Ultrasonic flow meters use sound to determine flow rate. Both Doppler Effect flow meters and time-of-flight flow meters are two types of ultrasonic flow meters.

Variable area flow meters measure by letting the flow stream change the opening in the flowmeter with a movement of an internal flowmeter part.

Vortex flow meters and fluid flow meters generate oscillations as a result of the flow that allows a flowmeter measurement to be taken.

Common Terms Related to Flow Meters including: Peak Flow Meters, Water Flow Meters, Fuel Flow Meters, Flow Monitor, Flowmeter Companies, Flowmeters, Ultrasonic Flow Meters, Mass Flow Meters, Air Flow Meters, Air Flow Meters.

Absolute Pressure - Atmospheric pressure plus gage pressure.

Accumulator - Area where fluid is under pressure and stored as a source of power.

Control Point - The temperature flowmeter instruments need to maintain to perform its designated function.

Coriolis Force - The force that occurs when a mass has a velocity moving outward in a rotating plane.

Counter Weight - A mass that is added to a particular substance to create a more balanced and stable apparatus for flow meters.

Current - The flow rate of electricity.

Density - A substance's mass per unit of volume.

Flow - The travel of materials in response to a force, such as pressure.

Flow Nozzle - A constriction made of a contoured plate that forms a hole for the flow stream so a flowmeter measurement can be taken.

Flow Rate - The velocity of flow.

Head-Loss - The loss of pressure in flow meters or a flowmeter system that is measured with a length parameter (such as amount).

Hot-Tap - Allows for flow meters to be inserted or removed without causing a complete system shutdown.

Integrator/Totalizer - A flow meters device that measures the total flow of fluids.

Manometer - Measures fluid pressure. This is a U-shaped flowmeter tube containing liquid which adjusts with the pressure in the flowmeter tube.

Mass Flow Rate - The volumetric flow rate of a liquid or gas times its density, expressed as pounds per hour or kilograms per minute.

Potential Energy - The potential of energy when a liquid is in a position or height above a flowmeter place to which it can potentially flow.

Transducer - The part of flow meters that sense fluid as it passes through the flowmeter device.

Transmitter - The part of flow meters that produce the usable flowmeter information from the transducer.

Weldolet - A connection for a metal pipe that is used to aid as a fitting for insertion-type sensors or flow meters.