Description

Brief Product Description

The Vibro-Meter TQ412 (111-412-000-012) is a high-precision, non-contact proximity sensor designed for measuring shaft vibration and displacement in critical rotating machinery. Built to API 670 standards, this reverse-mount transducer provides accurate data for turbines and compressors operating in extreme thermal environments.

Precision Turbomachinery Displacement Monitoring

The Vibro-Meter TQ412 111-412-000-012 stands as a primary sensing solution for the VM600 machinery protection environment. This proximity sensor utilizes eddy current technology to track the position and vibration of metallic shafts without physical contact. By delivering a broad frequency response from DC to 20 kHz, the TQ412 effectively monitors both static axial position and high-speed radial vibration. This dual-purpose capability allows plant operators to detect subtle mechanical shifts before they escalate into catastrophic failures, ensuring the long-term health of steam turbines, gas turbines, and centrifugal compressors.

Ruggedized Construction for Severe Industrial Conditions

Engineered for durability, the 111-412-000-012 features a high-grade stainless steel body equipped with a Torlon®-tipped transducer head. This specialized material selection ensures that the molded detection coil remains protected against chemical exposure and mechanical wear. Furthermore, the sensor operates reliably across a vast temperature spectrum from -40°C to +180°C, maintaining signal stability despite intense thermal cycling. The reverse-mount configuration specifically addresses the needs of space-constrained machine housings, allowing for secure installation where standard sensors cannot fit.

System Integration and Safety Assurance

The TQ412 111-412-000-012 integrates seamlessly with IQS900 signal conditioners to form a complete measurement chain. This combination supports SIL 2-rated safety architectures, providing a high level of confidence for emergency shutdown (ESD) applications. Transitioning from raw electromagnetic data to a linear voltage or current output, the system provides clear diagnostics via the VM600Mk2 monitoring platform. Additionally, the inclusion of Built-In Self-Test (BIST) capabilities allows for proactive predictive maintenance, significantly reducing downtime in power generation and oil and gas facilities.

Key Technical Characteristics

• API 670 Compliance: Meets rigorous global standards for machinery protection systems.
• Wide Measurement Span: Provides highly accurate displacement data across a 2–4mm range.
• Exceptional Thermal Stability: Resists extreme heat up to 180°C without signal degradation.
• Non-Contact Eddy Current Technology: Enables micron-level resolution for metallic target monitoring.
• Flexible Installation: Reverse-mount design facilitates mounting in compact or internal machine locations.
• Enhanced Signal Integrity: Pairs with IQS-series conditioners featuring advanced EMI protection and low output impedance.

Technical Specifications