TQ412 111-412-000-012

The TQ412 111-412-000-012 is a reverse-mount proximity sensor. This system is based on the eddy current principle and is designed to effectively monitor the condition of rotating machinery in harsh industrial environments.

Depending on the specific model selected based on the part number, it offers advantages such as explosion-proof capability, wide temperature range, high precision, and high stability. It can accurately address the challenges of detecting mechanical vibration and displacement even in high-temperature explosion-proof environments and high-risk heavy industrial settings.

During the selection, installation, and use of this model, strict adherence to system length requirements, temperature specifications, and explosion-proof guidelines will maximize product performance and ensure the long-term safe and stable operation of industrial units.

• Reverse-mount design: Optimized for installation from inside the bearing housing outward
• Non-contact measurement: No mechanical friction ensures long service life
• Interchangeable components: Sensors, extension cables, and signal conditioners are interchangeable within the same series
• High temperature resistance: Operates from -40°C to +180°C (short-term survival up to +220°C)
• High reliability: Integrated coaxial cable with AMP-type connector, short-circuit protection, and IP67 rating

• Mechanical Installation: Reverse-thread installation (metric or inch threads) from inside machine housing outward
• Electrical Connection (Probe End): Integrated cable connects to terminal box (JB 118) or extension cable (EA 402)
• Connection Notes: Hand-tighten connectors only; avoid using tools to prevent damage
• Protection: Recommended stainless steel flexible protective conduit for cable connection points

Several thermal power plants have installed TQ412 sensors in reverse configuration on turbine bearing housings to monitor main shaft axial displacement and radial vibration.

When paired with IQS450 and integrated into DCS and vibration monitoring systems, they provide real-time threshold alarms, resulting in over 30% reduction in shaft system failure-related outages. The system withstands long-term high-temperature and high-vibration conditions in steam turbines.