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The VIBRO-METER TQ4X2 + IQS452 is a high-reliability proximity measurement system engineered for continuous machinery protection in heavy industrial and turbomachinery applications. It operates using the non-contact eddy current principle to deliver precise, real-time measurements of shaft relative displacement, vibration, and axial position.

The system consists of two calibrated components—

• TQ4X2 Proximity Transducer

• IQS452 Signal Conditioner

These are factory-matched and fully interchangeable, ensuring consistent sensitivity, accuracy, and API-compliant performance. The design incorporates temperature compensation, high-pressure capability, and hazardous-area certified versions, making it ideal for mission-critical, high-speed rotating machinery.

Technical Data

Typical Applications

• Steam & Gas Turbines – Shaft relative vibration monitoring, overspeed protection interface

• Large Generators / Alternators – Axial position and thrust bearing monitoring

• Turbo-compressors – Continuous displacement and vibration diagnostics

• Submerged Pumps & Hydraulic Turbines (Kaplan, Francis) – High-pressure proximity sensing

• Hazardous Area Machinery – API 670-compliant protection in Ex-rated zones

The system excels in environments where conventional sensors fail due to high pressure, extreme temperatures, or explosive atmospheres.

FAQ

Q1: How does the eddy current principle enable non-contact measurement?
The IQS452 drives the TQ4X2 probe with a high-frequency signal, creating an electromagnetic field. As the metallic shaft moves within this field, eddy currents form and alter the field strength. The IQS452 interprets this change and outputs a signal proportional to the shaft-to-probe gap.

Q2: Can the transducer and signal conditioner be sourced separately?
Yes. The TQ4X2 probe and IQS452 conditioner are fully interchangeable with matching models and lengths, simplifying spare parts management and maintenance.

Q3: What safety standards does the system meet?
Many versions comply with API 670 machinery protection standards and carry Ex/CENELEC hazardous-area certifications, supporting safe operation in high-risk industrial environments.