Pepperl+Fuchs LVL-B2
Vibration Limit Switch
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- Limit switch for bulk solids
- Device with pipe extension
- No calibration: easy commissioning (plug and play)
- Insensitive to build-up: maintenance-free operation
- No mechanically moving parts: no wear, long operating life
- Sensor material stainless steel: hardly any abrasion even with building materials
- Insensitive to external vibration and flow noises
- Overview
- Comments
| Ripple | electronic insert FEM22 (E5): max. 5 V, 0 ... 400 Hz |
| Reverse polarity protection | separation voltage 2.2 kV |
| Input signal | probe covered - small amplitude probe not covered - large amplitude |
| IECEx approval | IECEx DEK 11.0068 |
| Measurement range | The measuring range depends on the mounting location of the device and the length of the pipe extension selected. The pipe extension is available in the following lengths: 500 mm, 1000 mm, 1500 mm, 20 inch, 40 inch, 60 inch |
| Output signal | digital |
| Storage temperature | -40 ... 85 В°C (-40 ... 185 В°F) |
| EC-Type Examination Certificate | KEMA 06 ATEX 0055 |
| Degree of protection | IP66/IP67, NEMA 4X |
| Connection | gland M20 thread G1/2, NPT1/2 |
| Equipment architecture | The measuring system consists of: - the device with electronic insert - a supply point - the connected control systems, switching units, signalling systems (e. g. lamps, horns, PCS, PLC, etc.) |
| Construction type | device with pipe extension |
| Electromagnetic compatibility | NE 21 |
| Measuring method | A piezoelectric drive excites the vibrating rod of the device to its resonance frequency. If medium covers the vibrating rod, the rod's vibrating amplitude changes (the vibration is damped). The electronics of the device compare the actual amplitude with a target value and indicates whether the vibrating rod is vibrating freely or whether it is covered by medium. |
| Measuring frequency | 700 ... 800 Hz |
| Climate class | EN 60068, part 2-38, fig. 2a |
| Degree of protection | IEC 60529:2001 |
| Surge protection | electronic insert FEM22 (E5) : overvoltage category III |
| Optional accessories | LVL-Z200 sliding sleeve for pressurized containerLVL-Z201 sliding sleeve for pressurized container LVL-Z202 sliding sleeve for unpressurized container LVL-Z203 sliding sleeve for unpressurized container |
| Measured variable | level (according to the mounting location and the overall length) |
| Material | F16 housing: PTB-FR, cover with transparent glass made of PA12, EPDM cover seal F18 housing: aluminum EN-AC-AlSi10Mg, plastic coated cover seal: EPDM process connections, sensor: stainless steel 1.4435/316L |
| Dimensions | max. andempty;85 mm (3.3 inch), length 160 mm (6.3 inch) + L L = 500 mm, 1000 mm, 1500 mm, 20 inch, 40 inch, 60 inch |
| Input/Other circuits | electronic insert FEM24 (WA) |
| Rated voltage | electronic insert FEM22 (E5): 10 ... 45 V DC electronic insert FEM24 (WA): 19 ... 253 V AC, 50/60 Hz or 19 ... 55 V DC |
| Vibration resistance | EN 60068-2-27 |
| Current consumption | electronic insert FEM22 (E5): max. 18 mA |
| Switching time | when covering the sensor approx. 0.5 s, when uncovering the sensor approx. 1.0 s |
| Ambient temperature | -40 ... 70 В°C (-40 ... 158 В°F) |
| Operating mode | MAX = maximum safety: The device switches if the probe is covered or if the supply voltage is disconnected in a safety-oriented manner (signal on alarm). example application: overspill protection MIN = minimum safety: The device switches if the probe is uncovered or if the supply voltage is disconnected in a safetyoriented manner (signal on alarm). example application: dry-running protection |
| Process connection | thread R1, R1-1/2 acc. to DIN 2999 thread 1-1/4 - 11-1/2 NPT, 1-1/2 - 11-1/2 NPT acc. to ANSI B 1.20.1 |
| Mass | device with F16 housing, electronic insert FEM24 (WA) and R1 thread: - 500 mm (20 inch) = approx. 1.3 kg - 1000 mm (40 inch) = approx. 2.0 kg - 1500 mm (60 inch) = approx. 2.6 kg |
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