VIBRO-METER VM600 TQ412 111-412-000-012 Proximity Sensor

The Vibro-Meter TQ412 111-412-000-012 serves as a high-performance inductive proximity sensor for rotating machinery. This specific reverse-mount model belongs to the renowned VM600 series by Meggitt. It measures shaft vibration and axial position with high precision. Furthermore, the sensor adheres to API 670 standards for machinery protection systems. Its rugged construction ensures reliable performance in the most demanding industrial environments.

Operational Functionality

This transducer operates based on eddy current principles to detect metallic target movement. The sensor head contains a molded coil that generates an electromagnetic field. As the shaft moves, it changes the field impedance for the connected IQS900 signal conditioner. Consequently, the system produces an output signal proportional to the physical gap distance. This non-contact method prevents wear and allows for continuous monitoring of high-speed rotors.

Advanced Design Features

The 111-412-000-012 features a specialized reverse-mount design for compact installation areas. Specifically, the Torlon® tip provides excellent resistance to chemicals and thermal expansion. Integrated temperature compensation maintains signal linearity across a broad thermal range. Additionally, the assembly includes an integral coaxial cable for secure data transmission. The hardware integrates seamlessly with VM600Mk2 racks for centralized data processing.

Industrial Applications

Engineers typically deploy this proximity system in power generation and petrochemical facilities. It monitors critical assets such as steam turbines, gas compressors, and large industrial pumps. Because it supports SIL 2 safety architectures, it is suitable for emergency shutdown loops. The sensor effectively detects shaft eccentricity and thrust bearing wear before failures occur. Therefore, it remains a vital component for predictive maintenance and asset protection.

Key Technical Specifications