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Description：

The system is based around a TQ402 or TQ412 non-contact sensor and an IQS900 signal conditioner. Together, these form a calibrated proximity measurement system in which each component is interchangeable. The system outputs a voltage or a current proportional to the distance between the transducer tip and the target, such as a machine shaft.

The active part of the transducer is a coil of wire that is moulded inside the tip of the device, made of Torlon® (polyamide-imide). The transducer body is made of stainless steel. The target material must, in all cases, be metallic.

The transducer body is available with metric or imperial thread. The TQ412 version is intended for reverse-mount applications. Both the TQ402 and TQ412 have an integral coaxial cable, terminated with a self-locking miniature coaxial connector. Various cable lengths (integral and extension) can be ordered.

Specification：

Frequently asked questions

Q1: What is the Vibro-meter TQ402 111-402-000-012 Proximity Sensor used for?

A1: The TQ402 Proximity Sensor is used for non-contact measurement of shaft displacement, shaft position, vibration, eccentricity, and runout in rotating machinery monitoring and protection systems.

Q2: What is the current output at the TQ402 minimum and maximum gap?

A2: The TQ402 ensor provides a current output of −15.5 mA at the minimum gap and −20.5 mA at the maximum gap.

Q3: What is the current measurement range of the TQ402 sensor?

A3: The TQ402 has a current measurement range of 5 mA, corresponding to the sensor's displacement measurement span.

Q4: What is the TQ402 current output range without diagnostics?

A4: Without diagnostics enabled, the output current range is −15.5 mA to −20.5 mA.

Product Applications

Power plants (steam turbines, gas turbines, water turbines): Used for real-time monitoring of turbine main shaft vibration, axial displacement (eccentricity), and speed to prevent catastrophic accidents caused by eccentric friction of the main shaft.

Oil and gas, petrochemical plants: Widely used in compressor units (such as centrifugal compressors and reciprocating compressors) and high-pressure pumps in large fertilizer plants and oil refineries to ensure the safety of continuous production lines.

Heavy chemical plants and pharmaceutical plants: Monitor the mechanical condition of reactor stirring shafts and high-load rotating pump bodies.

Iron and steel metallurgical plants and mining sites: Used for monitoring the clearance and vibration of bearings in high-load blowers, large transmission machinery, and mills.