Competing Technology Comparison
Engineers and facility managers looking for an air or gas flow measurement solution walk into the flow meter research and selection process with so many technology options that it can be difficult to narrow down the choices to the most effective technology for their application. Primarily, there are two main categories: volumetric flow technologies and thermal mass flow technologies. Within these two categories are flow meters functioning on various different flow measurement principles.
Exploration of Available Technologies and Flow Measurement Principles for Gas Flow Measurement
In this blog, we will discuss the basic aspects of these technologies to help guide you toward the right technology for your industrial gas flow measurement application. Below is a list of the most commonly used technologies in industrial markets:
Thermal Flow Meters
Thermal mass flow meters utilize the thermal sensing principle by using a constant temperature differential to measure the mass flow rate of air and gases.
Turbine Flow Meters
Turbine meters use the mechanical action of a rotor spinning in obstruction to the flow to measure the volumetric flow in the pipe.
Vortex Shedding Meters
Vortex flow meters place an obstruction in the path of the gas flow to create a swirling of the gas. The pressure variations caused by the swirling effect are measured by a sensor(s) placed after the obstruction.
Coriolis Flow Meters
When flow is present in the tubes of the Coriolis flow meter, it causes a twist in the tube(s). Pick off coils and magnets measure the twisting effect. The Delta T and time leg is directly proportional to the mass flowing through the tubes.
Differential Pressure (Orifice) Flow Meters
The most common differential pressure (DP) flow meter is the orifice plate. This device is used to measure flow rate by measuring pressure before and after the orifice plate placed in the pipe. Flow rate must be calculated using published formulae.
Positive Displacement Flow Meters
Positive Displacement (PD) flow meters use gears or pistons to divide the flow into fixed metered volumes. The timing of the metered volumes determines the volumetric flow rate.
Ultrasonic Flow Meters
Ultrasonic flow meters emit ultrasound pulses along and against the path of flow in the pipe. Using either transit time or doppler effect, these flow meters calculate the volumetric flow rate.
The Case for Fox’s Thermal Mass Flowmeters
For customers searching for a lower cost, higher accuracy, low flow measurement meter, thermal mass flow meters for gas by Fox Thermal beat DP meters and the other flow technologies on the market today. Compare the model FT4X thermal mass flow meter equipped with the state-of-the-art DDC-Sensor™ technology, new expanded Gas-SelectX® gas selection menu, CAL-V™ Calibration Validation, and a standard data logger with date and time stamp as the thermal flowmeter alternative to other technologies.
Look at the other benefits thermal gas flow meters offer over other flow measurement technologies:
For more information on thermal mass flow meters and their uses in your application, please contact an expert at Fox Thermal!