The single-rod vibration level switch is a type of tuning fork level switch. It is not afiraid of hanging materials or impacts, has no material clamping problems,and has higher sensitivity. Its cylindrical single measuring rod structure detenmines its wider adaptability to industrial sites, The single-rod vibration level switch uses the "resonance'principle of the tuning fork to generate vibration under te drive of the piezoelectric element.Only when the probe rod is completely surrounded by materials, the vibration amplitude will be sharply reduced, thereby generatinga switch action.
Working Principle
The probe of the vibration level switch is a vibrating body, which can be in the shape of a tuning fork or a round rod. Piezoelectric devices are generally used to drive and detect the vibration of the probe. When it is not in contact with the material, the vibration probe generates free vibration at the resonant frequency. When the vibration probe contacts the material to be measured, due to the resistance or damping of the material, the amplitude of the vibration probe is significantly reduced or even stopped, and the vibration frequency will also drop significantly. The amplitude and frequency of the output signal of the piezoelectric detection device will also decrease or drop accordingly. This change in the detection signal is detected and analyzed by the circuit and a switch signal is output.
Product Features
Application Field
The single rod vibration level switch is mainly used for level detection of solid materials and is suitable for various industrial scenarios, including chemical, pharmaceutical, food processing and other fields. Application media: * Material flow detection of conveying equipment * Solid-liquid interface detection * Powder, granular material, block solid level detection.
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Product Line
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| Standard flange type | Standard thread type | Standard chuck type |
Technical Specification
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Power |
220VAC/24VDC |
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Power Consumption |
3.5W |
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Vibration Frequency |
280Hz |
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Relay Contacts |
250VAC/30VDC4A |
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Electrical Connection |
M20×1.5 (Cable Diameter: ￠8-￠10) |
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Delay Time |
Measure (vibration stops) 0.5 seconds Recovery (stop vibration) 1~2 seconds |
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Operating Temperature |
Probe part/-30℃~+200℃. Base plate part/-30℃~+70℃ |
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Switch Function |
Normally open NO and normally closed NC, common COM |
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Vibration Frequency |
280HZ |
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Contact Rating |
250VAC/30VDC 5A SPDT |
Application Examples
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Field application: measuringplastic granules In the chemicalindustry, alargenumberofpowdered, granular and sliced products are produced.Plastic granules and powders are mostly stored in very high and fine silos, which are fed by air. The vibrating singlerod has proven to be very suitable for measuringplastics. Even ifthedensityofthe medium isonly20g/L,the measurement is still very accurate when the mediumis changed. In multi-chamber silos, cementor additional materialsarestored.Strong dust is generated when feeding.Dueto the different consistenciesofdifferent additional materials,different mediastacking angles are formed. The shape ofthe media stackingangle also changesafter each feeding. To prevent overflow, choose a singlerod. The flexible suspension cable can avoid mechanicalloads caused bythe feedingofthe medium. Theinstrument can be tested with an empty silo.Because thesingle rod hasno movable components, wear is greatlyreduced |
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Product Installation
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Installation precautions:
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Instructions and wiring
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Instructions for use:
Put the probe into the object to be measured and determine the alarm position of the probe or place it in the air. Press and hold the "SET" button for 3 seconds until the green light turns on alternately. Release the button and the setting is completed. The moment when it is placed in the air is the most sensitive.
*Note: Pay attention to safety when wiring in and out, and do not wire with power on to prevent short circuits and burn thesubstrate or probe. When working in a dusty environment, the entire machine should be kept sealed. |
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