Shinkawa VL-202A08L-1A42 Vibration Sensor Transducer Probe
Shinkawa VL-202A08L-1A42 Vibration Sensor Transducer Probe
The Shinkawa VL-202A08L-1A42 is an industrial-grade eddy-current (inductronic) displacement vibration sensor probe developed by Shinkawa Electric Co., Ltd. Designed for non-contact measurement of shaft vibration, axial position, and speed on critical rotating machinery, this probe converts minute distance changes into accurate electrical signals when coupled with a compatible signal conditioner or driver (such as the Shinkawa VK series).
Product Introduction / Overview
The VL-202A08L-1A42 probe operates on the non-contact eddy-current principle to continuously monitor shaft behavior in high-speed industrial turbomachinery. Capable of surviving harsh internal machine environments exposed to lubricating oil, steam, and high temperatures, it serves as a frontline transducer for machinery protection systems compliant with API 670 standards.
Primary Function: Non-contact shaft displacement, shaft vibration, and axial position measurement.
Target Equipment: Steam turbines, gas turbines, heavy industrial compressors, high-pressure pumps, blowers, and large electric motors.
Technical Parameter List
| Parameter | Specification / Detail |
| Manufacturer | Shinkawa Electric Co., Ltd. |
| Model Code | VL-202A08L-1A42 |
| Transducer Type | Non-contact Eddy-Current Proximity Probe |
| Tip Diameter | 8 mm nominal |
| Thread Spec / Housing | Metric M10x1 / Standard threaded body design |
| Linear Measuring Range | Approx. 0.25 mm to 2.25 mm (2.0 mm dynamic range) |
| Linearity / Sensitivity | Standard 8 mV/µm (or 200 mV/mil) with matching driver |
| Cable / Connector | Integrated armor-protected coaxial cable with miniature connector |
| Target Material Standard | 4140 Steel (AISI 4140) calibration target standard |
Product Features / Core Advantages
Non-Contact High-Precision Sensing: Measures sub-micron shaft movements without physical contact or mechanical wear.
API 670 Standard Alignment: Built to satisfy heavy industrial machinery monitoring criteria for API-compliant monitoring systems.
Ruggedized Construction: Features a durable stainless steel tip and threaded body engineered to withstand continuous exposure to hot synthetic lube oil and high-pressure steam environments.
High Frequency Response: Delivers rapid response capabilities from DC static position up to high dynamic vibration frequencies (>10 kHz).
Armored Cable Shielding: Flexible metallic armor option protects delicate coaxial signal leads from crushing and physical damage during cabinet pull-throughs.
Model Classification
Shinkawa VL series probe model numbers encode structural dimensions, thread sizes, tip diameters, and cable terminations:
VL-202A: Base family designation for Shinkawa eddy-current proximity probes.
08: Represents an 8 mm sensing tip diameter for standard linear distance sensitivity.
L / Thread Code: Denotes full-thread body design and metric thread dimensions (M10x1).
-1A42: Specifies particular unthreaded body length, overall case length, total system cable length, and protective armoring options.
Environmental Tolerance Conditions
| Condition | Tolerance Rating |
| Probe Tip Operating Temperature | -35°C to +177°C (-31°F to +350°F) |
| Cable & Connector Operating Temp | -35°C to +120°C (-31°F to +248°F) |
| Ingress Protection (IP) | IP67 / Hermetically sealed tip resistant to oil submersion |
| Differential Pressure Rating | Tip sealed against internal casing pressure up to 0.5 MPa (5 bar) |
| Vibration / Shock Resistance | Continuous exposure resistance per IEC 60068 standards |
Installation Method
Safety & Zeroing: Lock out the machine and verify that the target shaft is static before installation.
Mounting Bracket Setup: Thread the probe into a rigid internal bracket or external penetration sleeve. Do not over-torque.
Gap Adjustment: Position the probe tip relative to the target shaft to set the electrical center (typically set to -10.0 V DC gap voltage using a digital multimeter at the driver output).
Locknut Torque: Secure the probe locking nut to prevent loosening due to machine vibration.
Connector Protection: Secure the coaxial extension connection using insulating heat-shrink tubing to prevent ground loops and moisture ingress.
Operating Instructions
Target Surface Inspection: Ensure the shaft target area is clean, smooth, and free from surface scratches, magnetization, or runout defects.
Cable Bend Radius: Maintain a minimum cable bend radius of 30 mm for armored cable (15 mm for unarmored leads) during routing to prevent core damage.
Driver Pairing: Always operate the VL-202A08L-1A42 probe with its specified Shinkawa signal driver module and matched total system cable length (e.g., 5-meter or 9-meter matched systems).
Periodic Calibration: Perform mechanical gap checks and linear output voltage calibration during annual planned plant turnarounds