Description
The ifm Electronic VTV / VKV / VNB / VSA series are specialized vibration transmitters, accelerometers, and condition monitoring modules designed for predictive maintenance (PdM) and machine protection in rotating equipment.
- VTV121 / VTV122 / VTV121 → 2-wire / 3-wire piezo-accelerometer or vibration transmitter outputting 4–20 mA proportional to vibration velocity or acceleration (typically 0–25 mm/s RMS or 0–50 g).
- VKV021 / VKV022 / VKV121 → Vibration characteristic sensors / proximity probes (eddy-current type for shaft relative vibration on large turbo-machines).
- VNB001 → Condition Monitoring Gateway / Evaluation Unit for ifm IO-Link vibration sensors.
- VSA001 → Signal Adapter / Splitter for analog vibration signals into PLC / protection relay.
These devices are widely used on motors, pumps, fans, gearboxes, turbines, and compressors to detect bearing wear, imbalance, misalignment, and looseness before catastrophic failure.
Key Features
- Measurement Types: Acceleration (g), Velocity (mm/s RMS), Displacement (μm) — model dependent.
- Output: 4–20 mA (loop-powered 2-wire), 0–10 V, or IO-Link (on smart versions).
- Frequency Range: Typically 10 Hz – 1 kHz (velocity) or 0.5 Hz – 5 kHz (acceleration) — per model.
- Mounting: M8 or ¼-28 UNF stud (VTV/VKV series), DIN rail (VNB/VSA).
- Protection: IP65/IP67 (probe), IP20 (electronics unit).
- Country of Origin: Germany
Model Reference Table
Model | Type | Measured Param. | Output | Typical Use |
|---|---|---|---|---|
VTV121 | Vibration Transmitter (accel./vel.) | Velocity or Accel. | 4–20 mA (2-wire) | General machine vib. monitoring |
VTV122 | Vibration Transmitter (enhanced range) | Velocity / Accel. | 4–20 mA | Higher sensitivity / extended range |
VTV121 (dup) | see above | — | — | — |
VKV021 / VKV022 | Eddy-Current / Proximity Vib. Sensor | Shaft relative displacement | AC voltage (to conditioner) | Large rotating machinery (turbines, generators) |
VKV121 | Proximity probe / vib. sensor variant | Shaft vib. / position | AC coupled | Retrofit / API std. compliance |
VNB001 | Condition Monitoring Unit (IO-Link Master) | Evaluates ifm vib. sensors | IO-Link / Digital Alarm | Centralized PdM on multiple points |
VSA001 | Signal Adapter / Splitter | Splits analog vib. signal | 4–20 mA + separate monitor out | Feed PLC + local vib. meter simultaneously |
💡 Important: VTV series are loop-powered 2-wire (4–20 mA) transmitters — they require a 24V DC loop power supply (typically 12–30 V DC loop). VKV eddy-current probes require a driver/demodulator (often part of the machine protection system or ifm VB series). Always confirm frequency response and measurement unit (mm/s vs g) matches your acceptance criteria.
Technical Specifications (Representative — VTV121 Vibration Transmitter)
Parameter | Specification |
|---|---|
Model | VTV121 (ifm Electronic) |
Sensor Type | Integrated piezo-accelerometer with integrator (velocity output) or direct accel. — per config. |
Measuring Range | Typical 0–25 mm/s RMS (velocity) or 0–50 g pk (accel) — see ordering variant |
Frequency Range (-3 dB) | 10 Hz – 1 kHz (velocity mode) / 0.5 Hz – 5 kHz (accel mode) |
Output Signal | 4–20 mA (2-wire, loop-powered) proportional to measured value |
Supply Voltage (Loop) | 12–30 V DC (typical 24 V DC loop) |
Load Resistor (Max.) | (Vsup – 12 V) / 0.02 A → e.g. ≤ 600 Ω @ 24V DC |
Mounting | M8 × 1 stud or ¼-28 UNF (model dependent), tightened to 15–20 N·m |
Connection | M12 × 4-pin (A-coded) or cable — per full suffix |
Housing / Protection | Stainless steel / aluminum, IP65/IP67 |
Operating Temp. | -40 °C to +120 °C (sensor), -25 °C to +70 °C (electronics if separate) |
Standards | CE, RoHS, ATEX (some variants Zone 2 / Div 2 — check suffix!) |
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty (where offered)
- Technical support for:
- Vibration unit selection (velocity vs acceleration, mm/s vs g vs mils/s)
- Loop wiring (2-wire 4–20 mA to PLC analog input with proper shunt resistor)
- Alarm threshold setting guidance (ISO 10816/ API 670reference)
- IO-Link integration with ifm masters (VNB001)
- Cross-reference vs. Hansford HS-420 / Wilcoxon / PCB Piezotronics where applicable
Delivery Time
- Standard delivery: 3-5 working days (stock items)
- Express shipping available upon request
Why Choose Our Store
- Genuine ifm Electronic condition monitoring components
- Global supply network with competitive pricing
- Expertise in vibration monitoring & predictive maintenance (PdM)
- Comprehensive technical documentation (datasheets, mounting torque, frequency response curves)
- Responsive customer service and support
Applications
- Rotating Equipment Health Monitoring: Motors, pumps, fans, blowers, gearboxes
- Turbomachinery: Steam/gas turbines, compressors (with VKV eddy-current probes + API 670compliance)
- Predictive Maintenance Programs: Trending vibration to schedule downtime before failure
- Process Skids: Oil & gas, water treatment, pharma (where excessive vib. = process upset)
- Integration: Feed 4–20 mA into PLC analog input or ifm IO-Link master for alarm & trending
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