Official industry approved directory of Flow Meter Manufacturers and Suppliers.

Flow meters are devices used to measure and monitor the flow of gases and liquids through various systems. These instruments are designed and manufactured for use in a multitude of different industries and applications. They can vary in construction, size, configuration, and measurement technique. Some flow meters have to be built to operate effectively while exposed to volatile liquids, others have to handle a much larger volume of fluids, and still others have to measure mass instead of volume. All of these different factors contribute to the huge diversity in flow meter design. Other important factors include cleanliness, pressure, and operating temperature.

Sierra Instruments Inc

Monterey, CA | 800-866-0200

Manufacturers of high performance mass flow meters and controllers for nearly any gas, liquid, or steam. Customers choose Sierra when they need an accurate and repeatable flow measurement, short delivery lead times, expert flow advice, and long term support.


Sparta, NJ | 888-722-3569

Great Plains Industries is a leader in the manufacture of liquid flow meters, flow monitors, flow sensors and flow control equipment. GPI has become the flow meter supplier of choice for water meters, chemical meters, and general purpose flow measurement. GPImeters.com is the fully recognized stocking distributor for GPI, and we offer the full line of Great Plains Industries’ flow meter solutions. From turbine to sanitary flow meters, we have the flow meters you need!


West Valley City, UT | 800-316-5342

At Hydra-Check™, we manufacture and engineer a huge selection of diagnostic instrumentation for hydraulic components and systems. Since 1990, we have supplied high quality flow metering solutions for technicians and maintenance personnel, and it is our goal to provide outstanding equipment to make their job safer and more effective. We stock all kinds of flow meters and indicators to satisfy your application requirements. Check out our online catalog or give one of our representatives a call today to learn more!

John C. Ernst Co., Inc.

Sparta, NJ | 888-463-7678

As flow meter manufacturers, John C. Ernst’s measurement equipment can be digital or mechanical, in addition to a variety of other types for different measurements of flow. For each type, there are specific guidelines that are followed by companies like John C. Ernst to ensure proper usage. For more information, please call or go to their helpful website for full product descriptions.

Hoffer Flow Controls, Inc.

Elizabeth City, NC | 800-628-4584

Hoffer Flow Controls is an ISO 9001 certified manufacturer of high quality flow metering and flow control products. Our flow equipment is designed and manufactured to provide exceptional performance in even the most demanding industries, including the oil and aerospace industries, so they can stand up to your most challenging applications. Whether simple or complex, we have a flow metering solution for all of your flow applications! Call us today!

Clark Solutions

Hudson, MA | 978-568-3400

For over 50 years, Clark Solutions has provided top of the line flow meter solutions. We offer an extensive selection of high quality flow measurement and flow control instrumentation, including turbine flow meters, ultrasonic flow meters, vortex flow meters, flow indicators, and many other flow metering products. Whatever your flow control needs may be, we know that we have a solution to meet your specifications. View our complete offering online or give us a call for more details.

Siemens Process Instrumentation

Spring House, PA | 800-365-8766

Siemens flow meters meet the toughest challenges and are available in a wide variety of chemical resistant materials. Highly accurate and reliable, they measure and monitor flow rates of liquids with varying consistencies as well as gases. Technologies include electromagnetic, ultrasonic, differential pressure, vortex or Coriolis mass.

Manufacturers across practically all industries understand the importance of flow meters in everyday industrial processes. They are used to maintain efficiency and to help better understand profit gains and losses. The automotive, petroleum, HVAC, food and beverage, utility services, chemical, and many other industries all utilize flow meters extensively to monitor their operations. Some of the most frequently used and most popular flow meters include: water flow meters, peak flow meters, air flow meters, peak flow meters, fuel flow meters, and ultrasonic flow meters. Typically, these flow meters come in two general varieties: volumetric flow meters and mass flow meters. As their names suggest, one produces a measurement based on the volume flowing through the instrument while the other produces a measurement based on the mass of the fluid flowing through the instrument. These measurements can then be used to determine optimal flow rates for different processes or to track the use of specific fluids.

Some flow meters also come with a switch which allows them to measure and control flow, helping keep the rate of flow at a safe and efficient level. Other flow meters include flow indicators that utilize a viewing window to provide a visual indication of the flow, and another type, vortex flow meters, use obstructions to change flow pressure which can be used to measure flow. There are many unique and useful ways to measure flow, and these methods are represented in a variety of different flow meters. Thermal mass flow meters utilize two temperature sensors to measure heat loss in a fluid which can be used to calculate the flow rate. The Coriolis Effect can also be used to measure flow rates. Flow meters that use this method are called Coriolis flow meters, and these instruments use a tube that moves and rotates due to the flow of fluids inside. The forces behind these accelerations are then used to determine the rate of flow. Ultrasonic flow meters use sound to measure flow, electromagnetic flow meters operate under the principles of Faraday’s law, and rotometers determine flow using rotating floats.

With so many different flow meter types and configurations, it may be difficult to determine which meters are best for a particular application. Fortunately, flow meter manufacturers have the industry expertise and experience to help customers determine which features and instruments are most vital. Many manufacturers can also provide customized solutions to address specific factors and influences, and they can precisely meet application requirements.

John C. Ernst Co., Inc.

Flow MetersFlow Meter - John C. Ernst Co., Inc.

Flow MetersFlow Meter - John C. Ernst Co., Inc.

Flow Meter Informational Video