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Brand: VEGA
VEGA VEGASWING 51 Compact Vibrating Level Switch for Liquids
Description
A short-fork vibrating switch for tanks, pipes and pump protection
The VEGASWING 51 is VEGA’s compact vibrating level switch for liquids. A piezo drive makes a 38 mm tuning fork vibrate at its resonance frequency; when the fork is covered by liquid the frequency falls, and the integrated electronics turn the change into a switching command. VEGA says it detects the limit level reliably with millimetre accuracy independent of mounting position and can be used as empty or full detector, approved overfill protection, dry-run protection or pump protection in vessels and pipelines. It needs no setup with medium and has a stainless-steel 316L and PEI housing up to IP67.
Technical specifications
| Parameter | Specification |
|---|---|
| Type | VEGASWING 51, vibrating level switch for liquids |
| Process pressure | -1…+64 bar (-100…+6400 kPa) |
| Process temperature | -40…+100 °C; high-temperature version -40…+150 °C |
| Viscosity, dynamic | 0.1…10000 mPa·s |
| Density | 0.7…2.5 g/cm³; 0.5…2.5 g/cm³ can be ordered |
| Ambient temperature | -40…+70 °C |
| Hysteresis | Approx. 2 mm with vertical mounting |
| Process fitting | Thread from G½, ½ NPT; hygienic fittings |
| Operating voltage (electronic switch sheet) | 20…253 V AC 50/60 Hz or 20…253 V DC; load current 10…250 mA |
| Switching delay | 500 ms on/off; 0.5…60 s optional |
| Materials | 316L wetted parts; Klingersil C-4400 seal; housing 316L and PEI |
| Outputs | Contactless electronic switch, transistor (PNP) or IO-Link |
Setup, switching point and foam
The switching point is marked by notches in the fork and refers to water with the density switch set to at least 0.7 g/cm³. VEGA’s product information warns that foams of density above 0.45 g/cm³ are detected as product, which is worth checking in washdown or aerated tanks. For adhesive media the fork should protrude into the vessel, so avoid mounting bosses; and the product information adds that surfaces parallel to flow minimise resistance in pipelines.
51 versus 53, 61 and 66
The 51 has no tube extension and the VEGASWING 53 adds a freely selectable extension of 100 to 1000 mm. The plics-based VEGASWING 61 and 63 offer relay and NAMUR outputs and up to +250 °C, and the VEGASWING 66 covers -196 to +450 °C and 160 bar. Choose the 51 when a compact stainless side-wall switch is enough. State the fitting, voltage, output type and fluid density in your RFQ, and confirm approvals such as overfill protection with the manufacturer.
Typical use cases sit in compact skids and pump units: a 51 in the side wall of a day tank detects low level to stop a pump, another near the top provides a high alarm, and a pipeline version in a horizontal run detects the presence of liquid. The short fork needs very little nozzle length, and approvals for overfill protection printed by VEGA should be checked against your local requirement before using the switch as an independent safety device.
Documents and quotation
The official VEGA VEGASWING 51 (contactless electronic switch) specification sheet (34660-EN, version 240826) is attached to this page for download and covers the technical data, dimensions and wiring summarised above. The IO-Link and transistor versions have their own VEGA sheets.
RFQs are welcome with the tag number, medium, process conditions and electrical requirements. Seven Star LLC is an independent supplier based in Muscat and will answer with a quotation; compare alternatives in our level instrumentation section. Ordering details such as configuration, approvals and connection should be confirmed with the manufacturer before purchase.
Datasheets & Documents
- Datasheet VEGA VEGASWING 51 Specification Sheet (34660-EN) Download
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About brand
VEGA is a German maker of level and pressure instruments. Bruno Grieshaber founded the company in 1959 in Triberg in the Black Forest, and it has been based in Schiltach since 1975, still family owned as VEGA Grieshaber KG. VEGA is best known for radar level sensors: it introduced the first two-wire radar level sensor in 1997 and the first 80 GHz radar sensor for bulk solids, the VEGAPULS 69, in 2015.
Seven Star LLC is an independent supplier listing VEGA radar and guided wave radar transmitters, point level switches, pressure transmitters and signal conditioning instruments for buyers in Oman and the GCC. Sensors are matched from the product code on the type label.
VEGA at a glance
| Origin | Founded by Bruno Grieshaber in 1959 in Triberg, Germany |
|---|---|
| Headquarters | Schiltach, Black Forest, Germany (since 1975) |
| Ownership | Family-owned company: VEGA Grieshaber KG |
| Milestones | First two-wire radar level sensor (1997), first 80 GHz radar for bulk solids, VEGAPULS 69 (2015), VEGAPULS 6X single radar platform for liquids and solids |
| Product families | VEGAPULS radar, VEGAFLEX guided wave radar, VEGASWING and VEGAPOINT switches, VEGACAL capacitive probes, VEGABAR and VEGADIF pressure, VEGAMET and VEGADIS signal conditioning |
VEGA sensor and instrument series
| Series | Type | Typical use |
|---|---|---|
| VEGAPULS 6X, VEGAPULS 69, VEGAPULS 64 | Process radar level transmitters (80 GHz) | Storage and process tanks, reactors with agitators, silos and bulk solids |
| VEGAPULS 11, 21, 31, 42 | Compact radar sensors | Water and wastewater, simple storage tanks; VEGAPULS 42 with IO-Link for machine integration |
| VEGAPULS C 21, C 11, C 22, C 23 | Radar sensors with fixed cable, IP68 | Wet wells, pumping stations, open channels and river levels |
| VEGAFLEX 81, 82, 83, 86 | Guided wave radar (TDR) | Level and interface in liquids, bulk solids, hygienic and high-temperature or high-pressure service (VEGAFLEX 86) |
| VEGASWING 61, 63, VEGAPOINT 21 | Vibrating and capacitive point level switches | Overfill protection, dry-run protection and high or low level alarms |
| VEGACAL 62 to VEGACAL 67 | Capacitive rod and cable probes | Point and continuous level in solids and conductive or adhesive liquids |
| VEGABAR 82, 83, 28, 29, 38 | Pressure transmitters, ceramic or metallic cell | Process pressure and hydrostatic level; compact 18/19 and 28/29/38 versions for utilities |
| VEGADIF 85 | Differential pressure transmitter | DP flow, filter monitoring and level in pressurised vessels |
| VEGAMET 841, VEGADIS 176 | Controller and loop display | Level display, pump control and remote indication of 4-20 mA signals |
Where VEGA instruments are used
VEGA radar sensors measure level in crude oil and product tanks, separators, chemical reactors, cement and aggregate silos, grain stores and water reservoirs. Compact cable radars are widely used in wastewater pumping stations and flood monitoring. Because 80 GHz radar focuses a narrow beam, it can measure past internal structures in a tank, and it is not affected by the temperature, pressure or vapour above the product, which suits hot Gulf storage tanks.
Ordering VEGA instruments: what we need
The product code on the type label (for example PS64.XXXXXXX) fixes the measuring range, antenna or probe, process connection, electronics and approvals. Send it with the serial number. For a new measurement add the medium and its dielectric constant if known, tank or silo height and internals, process pressure and temperature, process connection, output (4-20 mA HART, PROFIBUS PA, Modbus or IO-Link), and any hazardous-area or overfill protection approval required.
Facts checked against VEGA company and product information, October 2026.
Browse VEGA products by category: Level Transmitter, Pressure Instrumentation, Controllers and Data Acquisition.
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Frequently Asked Questions
What does the VEGASWING 51 detect?
Limit level of liquids with a vibrating tuning fork, independent of mounting position.
What are the pressure and temperature limits?
-1…+64 bar and -40…+100 °C, or +150 °C in the high-temperature version.
Can it be used as overfill protection?
VEGA lists approved overfill protection, dry-run protection and pump protection among its uses.
What outputs are available?
Contactless electronic switch, transistor (PNP) and IO-Link.
What viscosity range does it handle?
0.1 to 10000 mPa·s.
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