Serviceline Industrial Sensors
Serviceline Explosion Protection

Vibration Limit Switch LVL-A7H

  • Limit switch for liquids in the food sector
  • External function test with test magnet
  • Onsite function check possible thanks to LED indication
  • Large selection of process connections for hassle-free installation in existing systems
  • Easy to install even at points difficult to access due to compact design
  • Rugged stainless steel housing
  • Suitable for process temperatures up to 150 °C (302 °F)
  • Cost-saving plug connections
  • Approval as overfill protection and leak detection system acc. to WHG

Please note: All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH, also apply to Pepperl+Fuchs AG.

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of  LVL-A7H

General specifications
Measuring methodThe tuning fork is brought to its resonance frequency by means of a piezoelectric drive. If the tuning fork is covered by liquid, this frequency changes. The electronics monitor the resonance frequency and indicate whether the tuning fork is freely vibrating or is covered by liquid.
Construction typecompact device
device with short tube
Operating modeMAX = maximum safety:
The device keeps the electronic switch closed as long as the liquid level is below the fork.
example application: overspill protection
MIN = minimum safety:
The device keeps the electronic switch closed as long as the fork is immersed in liquid.
example application: dry running protection of pumps
The electronic switch opens if the limit is reached, if a fault occurs or in the event of a power fails (quiescent current principle)
Rated voltage- DC-PNP: 10 ... 35 V DC, 3-wire
- AC/DC: 20 ... 253 V AC/DC, 2-wire
Current consumption- DC-PNP: < 15 mA
- AC/DC: < 3.8 mA
Power consumption- DC-PNP: < 975 mW
- AC/DC: < 850 mW
Measured variabledensity
Measurement rangemin. 0.7 g/cm3, optional> 0.5 g/cm3
Output typeswitch output
Switching currentmax. 250 mA
Directive conformity
Electromagnetic compatibility
Directive 2014/30/EUEN 61326-1:2006 , EN 61326-2-3:2006
Low voltage
Directive 2014/35/EUEN 61010-1:2010
Electromagnetic compatibilityNE 21
Degree of protectionIEC 60529
Shock resistanceEN 60068-2-27
Vibration resistanceEN 60068-2-64
Climate classDIN EN 60068-2-38/IEC 68-2-38
Measurement accuracy
Reference operating conditions- ambient temperature: 25 °C (+77 °F)
- process pressure: 1 bar (14.5 psi)
- fluid: water (density: approx. 1 g/cm3, viscosity: 1 mm2/s)
- medium temperature: 25 °C (+77 °F)
- density setting: > 0.7 g/cm3
- switching time delay: standard (0,5 s, 1 s)
Measured value resolution< 0.5 mm
Measuring frequencyapprox. 1100 Hz in air
Switching point13 mm ± 1 mm
Non-repeatability± 1 mm acc. to DIN 61298-2
Hysteresismax. 3 mm
Influence of ambient temperaturenegligible
Influence of medium temperature-25 µm/°C
Influence of medium pressure-20 µm/bar
Switching time- 0.5 s when tuning fork is covered
- 1.0 s when tuning fork is uncovered
- other switching times on request
Operating conditions
Installation conditions
Installation positionsee section mounting position
Ambient conditions
Ambient temperature-40 ... 70 °C (-40 ... 158 °F)
Storage temperature-40 ... 85 °C (-40 ... 185 °F)
Shock resistancea = 300 m/s2 = 30 g, 3 planes x 2 directions x 3 shocks x 18 ms, as per test Ea
Vibration resistancea(RMS) = 50 m/s2, ASD = 1.25 (m/s2)2/Hz, f = 5 to 2000 Hz, t = 3 x 2 h
Process conditions
Medium temperature-40 ... +100 °C (-40 ... +212 °F)
-40 ... +150 °C (-40 ... +302 °F)
Process pressure (static pressure)-1 ... +40 bar (-14.5 ... +580 psi)
State of aggregationliquid
Densitymin. 0.7 g/cm3, optional> 0.5 g/cm3
Viscosity1 ... 10000 mPa/s, dynamic viscosity
Solid contents< ∅5 mm
Mechanical specifications
Degree of protection- IP65/67, NEMA 4X enclosure (plug M12)
- IP65, NEMA 4X enclosure (valve plug)
- IP65/68, NEMA 4X/6P enclosure (cable)
- IP66/68/69, NEMA 4X/6P Enclosure (M12 plug for metal housing cover)
Connection- cable 5 m
- valve plug NPT1/2
- valve plug QUICKON
- valve plug M16
- plug M12
Materialsee technical information (TI)
Surface qualityRa < 1.5 µm (EHEDG)
Ra < 0.76 µm (EHEDG, 3-A)
Masssee technical information (TI)
Dimensionssee technical information (TI)
Process connection- thread ISO 228 G1/2, G3/4, G1
- DIN 11851 DN25 PN40, DN32 PN40, DN40 PN40
- thread ASME MNPT1/2, MNPT3/4, MNPT1
- thread M24 x 1,5 for flush-mounted installation in adapter
- DIN 11851 DN25 PN40, DN32 PN40, DN40 PN40 (dairy pipe)
- Tri-Clamp ISO 2852 DN25-38, DN40-51
- Flush-mounting in weld-in adapter Rd52, tuning fork can be aligned
Indication and operation
Display elementsThe LED display is on the connection side.
- green LED: indication of ready to operate
- red LED: fault indication
- yellow LED: operating mode indication
Function testfunction test with test magnet (optional accessory)
Certificates and approvals
Sanitary compatibilityEHEDG , see approval (ZE)
Overspill protectionZ-65.11-554 (overspill protection acc. to WHG)
Z-65.40-555 (leak detection system acc. to WHG)
If you need the approvals also in paper form, select the option WH in the type code.
General information
Supplementary documentationtechnical information (TI)
manual (BA)
approval (ZE)
Supplementary informationStatement of Conformity, Declaration of Conformity, Attestation of Conformity and instructions have to be observed where applicable. For information see
Designationsee technical information (TI)

Documents: LVL-A7H

ManualsLanguageFile TypeFile Size
BA01286O, Manual LVL-A7HENGPDF2806 KB
BA01286O, Handbuch LVL-A7HGERPDF2809 KB
Instruction manuals
ZE01010O, Zulassung WHG Z-65.11-554 LVL-A7, LVL-A7HGERPDF1123 KB
ZE01011O, Zulassung WHG Z-65.40-555 LVL-A7, LVL-A7HGERPDF1133 KB
Technical information
Declaration of Contamination / Erklärung zur KontaminationALLPDF137 KB
TI01148O, Technical information LVL-A7HENGPDF2669 KB
TI01148O, Technische Information LVL-A7HGERPDF2673 KB


CADFile TypeFile Size
3-D model LVL-A7H-AG1C/D-XXPX-XX in IGS format / 3-D-Modell LVL-A7H-AG1C/D-XXPX-XX im IGS-FormatIGS7039 KB
3-D model LVL-A7H-AG1C/D-XXPX-XX in STP format / 3-D-Modell LVL-A7H-AG1C/D-XXPX-XX im STP-FormatSTP3085 KB
3-D model LVL-A7H-AG1C/D-XXV1-XX in IGS format / 3-D-Modell LVL-A7H-AG1C/D-XXV1-XX im IGS-FormatIGS4343 KB
3-D model LVL-A7H-AG1C/D-XXV1-XX in STP format / 3-D-Modell LVL-A7H-AG1C/D-XXV1-XX im STP-FormatSTP1813 KB
3-D model LVL-A7H-AG1E/F-XXPX-XX in IGS format / 3-D-Modell LVL-A7H-AG1E/F-XXPX-XX im IGS-FormatIGS6765 KB
3-D model LVL-A7H-AG1E/F-XXPX-XX in STP format / 3-D-Modell LVL-A7H-AG1E/F-XXPX-XX im STP-FormatSTP2857 KB
3-D model LVL-A7H-AG1E/F-XXV1-XX in IGS format / 3-D-Modell LVL-A7H-AG1E/F-XXV1-XX im IGS-FormatIGS4469 KB
3-D model LVL-A7H-AG1E/F-XXV1-XX in STP format / 3-D-Modell LVL-A7H-AG1E/F-XXV1-XX im STP-FormatSTP1920 KB
3-D model LVL-A7H-AG2C/D-XXV1-XX in IGS format / 3-D-Modell LVL-A7H-AG2C/D-XXV1-XX im IGS-FormatIGS4987 KB
3-D model LVL-A7H-AG2C/D-XXV1-XX in STP format / 3-D-Modell LVL-A7H-AG2C/D-XXV1-XX im STP-FormatSTP2045 KB
3-D model LVL-A7H-AG4E-XXV1-XX in IGS format / 3-D-Modell LVL-A7H-AG4E-XXV1-XX im IGS-FormatIGS5161 KB
3-D model LVL-A7H-AG4E-XXV1-XX in STP format / 3-D-Modell LVL-A7H-AG4E-XXV1-XX im STP-FormatSTP2082 KB
3-D model LVL-A7H-BT5C-XXPU-XX in IGS format / 3-D-Modell LVL-A7H-BT5C-XXPU-XX im IGS-FormatIGS6802 KB
3-D model LVL-A7H-BT5C-XXPU-XX in STP format / 3-D-Modell LVL-A7H-BT5C-XXPU-XX im STP-FormatSTP3087 KB
CAD Portal / CAD PortalLINK---

Approvals+Certificates: LVL-A7H

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-2381APDF86 KB
EU-Declaration of conformity / EU-KonformitätserklärungDOC-2380APDF83 KB
Canada, USA CSACoC 2876507 cUSPDF34 KB
DIBT WHG Leak DetectionZ-65.40-555PDF463 KB
DIBT WHG Overspill ProtectionZ-65.11-554PDF454 KB

Function: LVL-A7H

The Vibracon LVL-A7H is a limit switch for universal use in all liquids. It is used preferably in storage tanks, mixing vessels and pipes, where the internal and external hygiene requirements are particularly stringent.

The device is suitable for applications in which float switches or conductive, capacitance and optical sensors have been used up to now. The device also works in areas where these measuring principles are not suitable due to conductivity, buildup, turbulence, flow conditions or air bubbles.

The device can be used for process temperatures up to:
- 100 °C (212 °F), CIP capable
- 150 °C (302 °F), CIP and SIP capable
- CIP = Cleaning in Place, SIP = Sterilization in Place

The device is not suitable for use in hazardous areas.

Functional Safety Hub from Pepperl+Fuchs

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