Tuning fork level sensor10/4/2023 In the oil and gas sector, refineries rely on vibronic instruments because they are among the most reliable of measuring instruments. These instruments can be used in storage tanks, containers and pipes for point level detection of all types of liquids. Vibronic instruments are well-suited for liquid level applications, including point detection at the top and bottom of tanks, certified leakage monitoring and overfill prevention, use in hazardous environments and in applications requiring safety integrity level (SIL) two and three certification. The frequency decreases when the fork is covered by a liquid, and this change is analyzed and translated into an on/off output signal by the instrument’s transmitter. The sensor portion of the instrument uses a tuning fork (Figure 2) that’s excited at its resonant frequency of about 85 Hz by a piezoelectric crystal, with a second crystal detecting the vibration produced by the first. Vibronic instruments consist of a transmitter and a sensor. This article describes those developments and shows how they benefit end users. While the basic technology of vibronic instruments hasn’t changed much over the years, today’s instruments now employ technological innovations to bring them into the digital age, meet the needs of Industry 4.0 and the Industrial Internet of Things (IIoT), provide diagnostics themselves and provide access from mobile devices. One instrument manufacturer, Endress+Hauser, produces 330,000 Liquiphant level instruments (Figure 1) each year, and has sold six million units since 1983. Available from multiple manufacturers, millions of these devices have been installed worldwide over the past few decades. Because we are the manufacturer, we also have the flexibility of being able to provide customized solutions in certain circumstances, based on the exact application needs.Vibrating fork level instruments - also called vibronic instruments - are widely used in the process industries. Our familiarity with exotic materials allows us to offer solutions for variables that are frequently hard to accommodate. We also offer other instrumentation that can handle excessive amounts of flow, pressure, and temperature. While KOBOLD offers a wide variety of instrumentation that meets most standard application needs, we are also able to meet extraordinary application needs that can be hard to find solutions for. INSTRUMENTATION ABOVE AND BEYOND THE STANDARD Because our models are both sophisticated and easy to use, they are very popular among end users. Our innovative instrumentation delivers that highest standards of service and can handle complex automated processes. Thanks to internationally recognized BUS interfaces, most of our models can be easily adapted into already established automated processes. Our technical solutions can be easily integrated into a wide variety of systems in many industrial sectors. MEASURING, CONTROLLING AND AUTOMATING WITH KOBOLD We are here to help you develop and select the best solution for your system, and eliminate the challenges that can come in selecting the most optimal and economical equipment for your application. Our expert engineers are always available during business hours to help you choose your KOBOLD solution, and their decades of experience are an asset that we are proud of. We believe in serving and supporting our customers and our products and have made customer service a priority. Our years of experience and our excellence in customer service and technical support have built our industry reputation as the partner of choice. Our technologies offer a solution oriented way to control the most diverse variables. Always on the leading edge, we offer a comprehensive portfolio of reliable instrumentation that is found in a vast array of applications all over the world. Some of our products have set the bar in the industry, helping to shape the field of industrial instrumentation into what it is today. KOBOLD and its affiliate companies have been and continue to be leaders in the field of industrial measuring and control equipment. INDUSTRIAL MEASURING AND CONTROL EQUIPMENT Accessories, including magnetic filters, needle valves, regulating valves, control devices and relays.Temperature switches, temperature gauges and temperature transmitters.Level switches, float switches, level gauges, level transducers, level indicators and level transmitters.Pressure gauges, pressure transmitters and pressure switches.Flow meters, flow switches and flow transmitters.We offer one of the industry’s broadest lines of sensors, switches and transmitters to measure and control flow, pressure, level and temperature. For decades, KOBOLD has been a world leader in process measurement and control solutions.
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