Flowmeter Types and their Principles

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Load Cell Troubleshooting Tips

The following four tests can be used to assist in troubleshooting load cells. A precision power supply and multimeter are necessary.Test 1: Mechanical InspectionEach load cell should be inspected for physical damage. A thorough inspection of the entire length of any cables should be done. Nicked or abraded cables can short out a load cell. Inspect for distortion or cracks on all metal surfaces. Flexure surfaces, if any, should be parallel to each other and be perpendicular to both end surfaces. If the load cell has been physically deformed (bent, stretched, or compressed from original configu
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What Kinds of Load Cells Exist?

Load Cells are classified into the following shapes: It is important to use the load cell with the capacity and structure appropriate to the position where it will be used.Example 1)Single point load cells are often used for ordinary (small to medium sized) scales. The load point of the single point load cell is placed under the center of the weighing pan. Example 2)For industrial scales such as tanks and hoppers, beam and column load cells are normally used. One or multiple load cells may be necessary, but when using multiple load cells, the load applied onto each load cell should
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Introduction to Load Cells: What is a Load Cell?

A load cell is a transducer which converts force into a measurable electrical output. Although there are many varieties of load cells, strain gage based load cells are the most commonly used type. Load Cell History Before strain gage-based load cells became the method of choice for industrial weighing applications, mechanical lever scales were widely used. Mechanical scales can weigh everything from pills to railroad cars and can do so accurately and reliably if they are properly calibrated and maintained. The method of operation can involve either the use of a weig
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Proportional Valves

The performance of proportional valves falls in the wide spectrum between on/off solenoid valves and electrohydraulic servovalves. The valves are termed proportional because output flow is not exactly linear in relation to input current. Despite their nonlinear response, the valves are an inexpensive way to control position, velocity, or force on equipment requiring high-speed response at high flow rates.Many proportional valves are modified versions of four-way, on/off solenoid valves in which proportional solenoids replace conventional solenoids. In operation, solenoid force is balanced by
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