Shinkawa VL-452A11A-2112/EX5 Sensor VK-A Series

Overview

The Shinkawa VL-452 sensor, type VL-452A11A-2112/EX5, is an eddy current displacement sensor from the VK-A series transducer system, which also includes the VW extension cable and the VK driver. The VL-452 sensor measures the gap to a metallic target without physical contact and outputs a voltage proportional to distance, making it the standard sensing element for turbine and compressor vibration monitoring in Japanese and international power plants.

Shinkawa vibration monitoring systems protect the worlds major turbomachinery fleets. This Shinkawa VL-452 sensor variant, with the -2112/EX5 configuration, is the explosion-proof sensor option intended for hazardous-area machine trains, and is a direct spare for the original Shinkawa installation.

Engineering & Design

The VK-A series transducer uses the eddy current principle: the sensor head generates a high-frequency field, and changes in the gap to the target change the coil impedance, which the driver converts into a DC output voltage. According to the official VK-202A instruction manual, the system offers a linear range of 2000 μm (approximately 80 mils) for JIS SCM440 (AISI 4140 steel) as the standard calibration material.

The Shinkawa VL-452 sensor is installed in a sensor holder or mounting block on the machine bearing housing, with the sensor face positioned to the specified air gap from the shaft surface. The VW extension cable carries the high-frequency signal from the sensor to the VK driver, which conditions the signal and provides the DC output to the monitor. Correct gap setting and secure cabling are essential for repeatable readings; the official manual provides the installation accessories, mounting arrangements and test data for supply variation, target material, target diameter, target curvature and side bore, so the system can be verified against the original characteristic after installation.

The system is specifically designed to measure high-speed shaft vibration, eccentricity and thrust position. Field wiring from the driver to the monitoring instrument uses 3-wire shielded cable and can be extended up to 500 m maximum. The /EX5 suffix marks the explosion-proof sensor version for installation in classified areas.

Key Features

• Shinkawa VL-452 sensor – VL-452A eddy current displacement sensor (VK-A series)
• Non-contact gap measurement with voltage output proportional to distance
• Linear range 2000 μm (approx. 80 mils) on JIS SCM440 (AISI 4140)
• Explosion-proof /EX5 configuration for hazardous areas
• 3-wire shielded output, extendable up to 500 m
• Designed for shaft vibration, eccentricity and thrust position

Applications

• Radial vibration monitoring on steam and gas turbines
• Axial displacement (thrust position) measurement
• Shaft eccentricity monitoring on compressors and generators
• Replacement of worn sensors in Shinkawa VM-5/VM-7 monitor systems

Specifications

Compatibility

The Shinkawa VL-452 sensor is part of the VK-A series transducer family and mates with the VW extension cable and VK-452 driver. It connects to Shinkawa vibration monitors and to third-party monitoring systems that accept the standard eddy current transducer signal.

Ordering Information

Order the Shinkawa VL-452 sensor, type VL-452A11A-2112/EX5, as a direct replacement for the original sensor in your Shinkawa vibration train. Verify the cable length and connector configuration of your installation before ordering.

The Shinkawa VL-452 sensor with the extension cable covers the displacement measurement of the machine train with the VM-5K monitor.

Why Seven Star LLC

Seven Star LLC supplies Shinkawa vibration monitoring spares to power and oil & gas plants across Oman and the GCC. Each VL-452 sensor is checked against the original part number and

Seven Star LLC maintains a regional inventory in Muscat and coordinates directly with manufacturers across Europe and Asia. Our engineers help you verify the exact model and revision before ordering, avoiding costly mismatches.

Call To Action

For the Shinkawa VL-452 sensor or any related control and instrumentation requirement, contact the Seven Star LLC team. Submit a formal inquiry through our RFQ page with your measurement range, connection and configuration, and our specialists will respond with a detailed commercial proposal and the official Shinkawa documentation.