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The Vibration Limit Switch is designed for liquid applications, providing reliable performance in various industrial environments. With a robust stainless steel housing and the capability to withstand process temperatures up to 100 °C (212 °F), this device ensures durability and longevity.
The Vibration Limit Switch is an essential component in industrial automation, primarily used to monitor vibration levels in liquid systems. This device is engineered to activate at predetermined vibration thresholds, ensuring safety and operational integrity in processes where fluid dynamics can lead to hazardous conditions. The switch features a G1/2 process connection, making it compatible with a wide range of industrial applications.
One of the key advantages of this product is its onsite function check capability, facilitated by an integrated LED indicator. This feature allows operators to easily verify the functionality of the switch without the need for extensive downtime or complex testing procedures. Additionally, the external function test with a test magnet provides a convenient method to ensure the switch operates correctly, further enhancing reliability in critical operations.
| Material | process connection and short tube: stainless steel 316L (1.4401/1.4435) tuning fork: stainless steel 316L housing cover and connector: PPSU |
| Vibration resistance | EN 60068-2-64 |
| Measurement range | min. 0.7 g/cm3 |
| Electromagnetic compatibility | NE 21 |
| Supplementary information | Statement of Conformity, Declaration of Conformity, Attestation of Conformity and instructions have to be observed where applicable. For information see www.pepperl-fuchs.com. |
| Fusing | external 500 mA slow |
| Degree of protection | IEC 60529 |
| Operating mode | MAX = 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) |
| Hysteresis | max. 3 mm |
| Current consumption | < 15 mA |
| CSA approval | cCSAus Listed, General Purpose |
| Construction type | compact device |
| Influence of medium temperature | -25 andmicro;m/°C |
| Surface quality | Ra < 3.2 andmicro;m |
| Output type | switch output |
| Measured value resolution | < 0.5 mm |
| Switch-on delay | max. 3 s |
| Influence of ambient temperature | negligible |
| Influence of medium pressure | -20 andmicro;m/bar |
| Residual ripple | 5 V ss at 0 … 400 Hz |
| Switching point | 13 mm � 1 mm |
| Connection | This device may be used with any sequential circuit, as long as the circuit can support the electrical circuit values of the switching elements. |
| Supplementary documentation | technical information (TI) manual (BA) approval (ZE) |
| Non-repeatability | � 1 mm acc. to DIN 61298-2 |
| Measuring method | The 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. |
| Switching time | – 0.5 s when tuning fork is covered – 1.0 s when tuning fork is uncovered |
| Display elements | The LED display is on the connection side. – green LED: indication of ready to operate – red LED: fault indication – yellow LED: operating mode indication |
| Process connection | thread G1/2 to ISO 228 |
| 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) |
| Mass | approx. 140 g |
| Power consumption | 975 mW |
| Switching current | max. 250 mA |
| Overspill protection | see approval (ZE) |
| Measuring frequency | approx. 1100 Hz in air |
| Rated voltage | 10 … 35 V DC |
| Degree of protection | IP65/IP67 , NEMA 4X |
| Shock resistance | EN 60068-2-27 |
| Measured variable | density |
| Designation | see technical information (TI) |
| Climate class | DIN EN 60068-2-38/IEC 68-2-38 |
| Connection | M12 connector, 4-pin |
| Function test | function test with test magnet (optional accessory) |
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