9/24/2023 0 Comments Tuning fork level sensor![]() A 'smart' microprocessor-based electronic unit keeps the sensor in a resonant state as it changes from dry to wet or wet to dry. When included in a fail-safe circuit this device provides an extra degree of fail safety improving system integrity. The resonator utilizes a piezoelectric driven tuning fork that exhibits a large change in resonant frequency when immersed in any liquid. The fact that this device is vibrating normally when dry makes it ideal for use in high level detection applications.Īny change in the sensor signal, however caused, will result in a status change of the switch and an alarm may be activated. The LED gives an indication that the switch is functioning correctly and gives a visual indication of the state of the relay.Ī fail-safe switch on the circuit board is provided for the user to select either "make" when dry - the normal condition - or "make" when wet, as would be selected for low level duties. The LED will flash approximately once per second when the switch is "off' and will remain constantly lit when the switch is "on". The Series 100 includes a status indicating LED which may be viewed through a lens in the NEMA 4X enclosure cover or with the cover removed, on the explosion proof model. applications - drawing 16.8 MA when "on" and 6.0 MA when "off'. This option is similar to the DIN 19234 (NAMUR) Switching Levels except it is not suitable for I.S. The LTU-2000 Series is based on the vibrating tuning fork principle, using piezoelectric crystals. The new option "W" provides a unique step change output for 2-wire 24VDC applications. The LTU-2000 Series Tuning Fork Sensors are point level switches that are designed to detect low or high levels of liquids. When relay output is required a SPDT dry contact output version is available with selectable high or low level fail-safe. When specifying the standard 2-wire output version, the switch may also be interfaced directly to a 3 wire 24VDC PLC using a third PLC terminal on the circuit board. At present, the lowest material density that can be. It is a solid level switch specially used for measuring powder and fine particles. The solid state output stage acts as a simple SPST switch, operated by liquid presence. The vibrating fork body (also called fork wings) of the tuning fork level switch is longer and wider, with a typical size of 150mm long, 22mm wide and 4mm thick. Just a simple mounting and calibration procedure that keep your facility in. The physics behind this method is that a piezoelectric crystal oscillates a tuning fork at its natural frequency, as shown in Figure 1-2. This shift is being monitored continuously and once a present threshold is exceeded, the output changes status.Ī standard two core cable is used to connect the switch in series with the load. Tuning fork of level switch provides reliable & maintenance-free for bulk solids. Tuning fork level switch sensors are used for monitoring viscous liquid levels in industrial applications to detect levels of liquid, grain, or powder-like material in a storage tank as shown in Figure 1-1. ![]() As the tuning fork is covered by a liquid or slurry, a corresponding shift occurs in the vibrating frequency of the tuning fork. A piezoelectric crystal system is used to create a 1200 Hz vibration in the tuning fork. The Series 100 has a tuning fork style probe which vibrates at its natural frequency when in air. The Magne-Sonic Series 100 is a two wire device which may be installed in any position in a pipe or vessel to detect the presence of a liquid. They can be mounted on the top or side of tanks or grain elevators, and can operate in temperatures up to 392☏ and pressures up to 215 PSIG.Series 100 Vibrating Tuning Fork Liquid Level Switch The working principle of the tuning fork level switch is to make the tuning fork vibrate at a certain resonance frequency through a pair of piezoelectric. The vibrating fork level switch is ideal in free flowing powders and granules, most commonly found in the agriculture and cement industries. These durable, yet compact, devices come with a wide range of electrical connections, outputs, fittings, and a number of other selections to meet any end-user demands. If you need to measure sound, look into the range. When materials come into contact with the fork tines, the frequency of vibration falls relative to the natural resonance frequency in free air, sending an electronic signal detecting the presence of material. Several quality vibrating fork level sensor designed for various environments are available at great prices. ![]() The L92 Series Vibrating Fork Point Level Switch is a heavy-duty stainless steel vibrating fork ideal for measuring the presence of solids and powders across a wide range of media and applications.
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