UWT offers the Mononivo Series 4000 for this purpose, which detects materials from a bulk density of 20 g/l and has a 1" process connection.įind out more about our vibration fork series Vibranivo® and our vibration rod series Mononivo®. Vibrating forks are therefore well suited for small vessels and solids with large particle sizes. In addition, there is no danger of solids with a large grain size becoming jammed, which leads to faulty switching in tuning forks. With the vibrating rod, only one rod vibrates, which means that the vibrating rod can be built much more compactly. For this purpose, UWT offers the Vibranivo series 10, which detect materials with a bulk density of 50 g/l and more.Īnd are also suitable for interface measurement. These vibrating forks are particularly suitable for strongly adhering materials as well as for the detection of solids in ![]() Vibrating fork short = lower sensitivity = higher resonance frequency = stronger self-cleaning effect.Vibranivo Series 20, which can even detect materials with a bulk density < 5 g/l. These vibrating forks are particularly suitable for very light and few adhering materials. Vibrating fork long = higher sensitivity = lower resonant frequency = lower self-cleaning effect. ![]() There is a relationship between resonant frequency, leg length, sensitivity and self-cleaning effect: Due to the oscillation of the tines, a certain self-cleaning effect is created. Vibration fork level switches consist of two tines vibrating at their mechanical resonance frequency. Vibrating level limit switches are differed between vibration fork and vibrating rod, which differ in their mechanical design but not in their operating principle. UWT vibrating level limit switches are suitable for process temperatures up to 150☌ and process pressures up to 16 bar. The design of this piezo stack largely defines the range of application. The main component of the vibrating level limit switch is a piezo stack which is electrically excited and thereby vibrates. When included in a fail-safe circuit this device provides an extra degree of fail safety improving system integrity.Point level detection with Vibration Level Limit Switchesĭepending on the requirements, vibrating level limit switches are used as full, demand or empty detectors in storage silos or process vessels and are suitable for use in almost all media. 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 new option "W" provides a unique step change output for 2-wire 24VDC applications. 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. The solid state output stage acts as a simple SPST switch, operated by liquid presence. 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. As the tuning fork is covered by a liquid or slurry, a corresponding shift occurs in the vibrating frequency of the tuning fork. SCX1 Vibrating Probe Level Switch is a vibrating tuning fork point level sensor that utilizes piezoelectric crystal and solid state electronics technology. A piezoelectric crystal system is used to create a 1200 Hz vibration in the tuning fork. Easy mounting at almost any angle and calibration procedures will provide reliable functioning and less required monitoring. The Series 100 has a tuning fork style probe which vibrates at its natural frequency when in air. The tuning fork level switch provides a reliable & maintenance-free means of process control for bulk solids. 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. Series 100 Vibrating Tuning Fork Liquid Level Switch
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