Updated on 19 October, 2021
The Flow Tester is a device used in the measurement of flow. This device is designed to measure the flow of a fluid, usually by viewing a computer screen. It has many practical uses in industries. It helps companies to maintain their performance level of their various machineries and equipment. The main use of the Flow Tester is to find out whether there is a reduction in performance of a machined part. The Flow Tester can be used for several applications in the industry.
The Flow Tester is a solid-state device used in the measurement of solid-state flow. It is useful in determining the flow rate, temperature, and pressure. The flow tester uses a probe connected to a solid-state sensor to read the results of the measurement resolution. There are many benefits of using the flow tester such as low cost, high reliability, high accuracy, and high control accuracy.
The flow tester is available in different varieties such as wire, solid state, and cartridge. All flow testers have some common components such as pressure switch, needle, valve, and powder discharge. All of them have some specific parts such as pressure switch, needle, and valve which are extremely vital to the functioning of the flow tester.
The Flow Tester has been found very useful for measuring the flow rates in the various machineries that use large amount of powders such as in bakeries, welding and metal works, paper mills, rubber and plastic industries, as well as pulp and paper mills. In the recent times, with the improvement in technology, the flow tester has been made portable to different locations including factories, mills, processing plants, distribution hubs, as well as to the homes. The handheld or the stand-alone flow tester can measure the flow rate of powders in HVAC systems as well. In the manufacturing sector, it can also measure the quantity of powder delivered per hour or per minute.
There are mainly two types of flow testers available in the market, the first one being the laminar flow tester and the second one being the non-laminar flow tester. The laminar flow tester has a small housing which contains the needle and the control electronics. Hence, the process of measuring the flow rate and the pressure will be less noticeable than the non-laminar flow tester. Moreover, it provides complete control over the mass flow and temperature of the mixture. As compared to the laminar flow testers, the non-laminar flow tester has larger storage tank for storing the collected samples.
The two main benefits of using the powder flow tester are the high accuracy and the high quality control. The high accuracy refers to the absence of any errors in the measurement, irrespective of the applied force. In addition, the high quality control involves the absence of any discontinuity in the measured results, irrespective of the applied force being distributed in the sample.
A typical powder flow tester consists of four major parts, namely the collecting container, the control unit, the measuring device and the software. The collecting container is an enclosure that has a neck that fits around the neck of the machine. It is mostly made from polyethylene, silicone or PVC and has a metallic or wooden frame. The rest of the body of the machine is made up of the motor assembly, which controls the movement of the rotary brush head attached to the interior. A further part called the loading mechanism can be used to load the material into the machine along with the measured amount of powder, and a last component called the dispenser delivers the collected product per time through an interface known as the dispense tubing.
There are two methods that are commonly used to measure the amount of powder flowing through a pipeline. The first method is known as closed loop and is applicable for relatively small particles. For larger sized particles, the second method is more appropriate as it takes into account the viscosity of the materials being tested. The open loop method involves installation of a particle collection and analysis chamber with movable parts in close proximity to one another, and involves placement of the sample in the chamber, spinning at high speeds in the chamber, and eventually emerging into the collection hopper, which is closed until the sample stops spinning.