Wilcoxon Sensing Technologies 4-20 mA LPSTM Series Transducer Selection Guide
Wilcoxon Sensing Technologies' 4-20 mA LPSTM Series transducers are self-contained vibration transmitters designed to provide direct input of vibration information to Programmable Logic Controllers (PLCs) or Distributed Control Systems (DCS). This capability enables plant personnel to trend overall vibration data, correlate it with plant operating conditions, and schedule maintenance tasks, supporting Condition Based Maintenance (CBM) programs even without dedicated vibration analysis technicians. These loop-powered sensors continuously monitor machinery critical to plant operations, aiding in maintenance scheduling and identifying machines with severe vibration problems.
Product Overview
The Wilcoxon LPSTM Series of sensors outputs a 4-20 mA signal that directly correlates to the average vibration of the monitored machine, offering a convenient, reliable, and cost-effective solution for machine health monitoring. They are available with various features to meet diverse application needs, including configurations for peak, true peak, or RMS output signals (representing velocity or acceleration), dual outputs for temperature and vibration, and dual outputs for dynamic vibration signals. Many units are also available with intrinsically safe operation or explosion-proof cases for hazardous environments. Velocity is the primary measurement for machinery vibration on external cases, and these transducers are available in units measuring vibration in terms of velocity or acceleration. The full-scale setting is fixed and determined at the time of purchase, guided by ISO 10816 standards and machine-specific vibration limits.
Product Attributes
- Brand: Wilcoxon Sensing Technologies
- Product Series: LPSTM Series
- Origin: USA
- Certifications: CSA (U.S. and Canada), LCIE ATEX
- Hazardous Area Certifications: Intrinsically Safe (CSA Class 1, Div 1, GRPS A, B, C, D T3C; LCIE ATEX EEx ia IIC T3), Explosion Proof (CSA Class 1, Div 1, 2 GRPS A, B, C, D; Class 2, Div 1, 2 GRPS E, F, G; Class 3, Div 1, 2 T3C; LCIE ATEX EEx d IIC T3, EEx nA IIC T3)
Technical Specifications
| Feature/Model | Description | Details |
|---|---|---|
| Measurement Types | Velocity or Acceleration | For condition assessment. |
| Output Signal Calibration | Peak, True Peak, RMS | Broadband LPS Series transducers. Frequency banded versions offer Peak or RMS only. |
| Full Scale Selection | Pre-configured, not user-adjustable | Guidelines based on normal vibration levels (10-20% of full scale) and manufacturer/ISO limits. |
| ISO 10816 Guidance | Part 3: Industrial machines (nominal power > 15 kW, speeds 120-15,000 RPM) | Classifies machines into groups (1, 2, 3, 4) and evaluation zones (A, B, C, D) based on rotor mode (rigid/flexible). |
| Equipment Groups (ISO 10816-3) | Group 1, Group 2, Group 3, Group 4 | Defined by rated power and shaft height/bearing type. |
| Evaluation Zones (ISO 10816-3) | Zone A, Zone B, Zone C, Zone D | Qualitative assessment of vibration severity and recommended actions. |
| Dual Output Options | Temperature & 4-20 mA Vibration | For temperature-sensitive operations. |
| Dual Output Options | Dynamic Signal & 4-20 mA Vibration | Dynamic output can be 100 mV/g (acceleration) or 100 mV/ips (velocity). Allows for trending and detailed analysis with portable analyzers. |
| Frequency Banded Transducers | Low Frequency (3 Hz - 40 Hz) | Model PC420VP-10-B3041. Focuses on frequencies associated with balance and alignment problems (e.g., 1X running speed). |
| Frequency Banded Transducers | High Frequency (300 Hz - 2,000 Hz) | Model PC420AR-10-3223. Focuses on frequencies associated with pump cavitation. |
| Hazardous Area Models | Intrinsically Safe (-IS) | CSA Class 1, Div 1, GRPS A, B, C, D T3C; LCIE ATEX EEx ia IIC T3. |
| Hazardous Area Models | Explosion Proof (-EX) | CSA Class 1, Div 1, 2 GRPS A, B, C, D; Class 2, Div 1, 2 GRPS E, F, G; Class 3, Div 1, 2 T3C; LCIE ATEX EEx d IIC T3, EEx nA IIC T3. |
| Model Number Structure | PC42x / PCC42x - [Measurement Type] - [Range] - [Options] | e.g., PC420VP-10 (Velocity, Peak, 1.0 ips); PC420VP-10-DA (Velocity, Peak, 1.0 ips, with Dynamic Acceleration output). |
| Cabling/Connections | Top Exit, Side Exit, Integral Cable | Options include PCC421 (small side exit), PCC423 (integral cable, small side exit), PC425 (side exit with temp sensor), PC427 (side exit with temp sensor and integral cable). Connector options: R6, M12-4, J9T2A, J10, J9T4, J9T4A, J95. |
| Standard Integral Cable Length | 16 feet | Alternative lengths available upon request (may incur per-foot charge). |
2412111044_Amphenol-PC421VR-05-IS_C3319101.pdf
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