Product Introduction

Eddy current sensors are non-contact linearization measurement tools. They possess advantages such as high long-term reliability, wide measurement range, high sensitivity, high resolution, fast response speed, strong anti-interference ability, and immunity to media such as oil contamination. Therefore, they are widely used in industries such as power, petroleum, chemical, and metallurgy for dynamic and static non-contact displacement measurement of large rotating machinery such as steam turbines, water turbines, blowers, compressors, gearboxes, and large cooling pumps. For example:

Radial and axial shaft displacement, differential expansion, shaft eccentricity, shaft vibration, key phase, and rotational speed.

To meet the needs of various measurement schemes, we offer a variety of eddy current sensors. If classified by probe specifications (diameter), they can be divided into three specifications: DWQZΦ8mm, DWQZΦ11mm, and DWQZΦ25mm. If classified by the total length of the system cable (probe cable length + extension cable length), they can be divided into two types: 5m and 9m.

Product Composition

The DWQZ series eddy current sensor consists of three parts: the DWQZ probe, the DWQZ extension cable, and the DWQZ preamplifier.

DWQZ series probes

The probe consists of an inductor, protective cover, stainless steel housing, high-frequency cable, high-frequency connector, etc. Depending on the measurement range, probes of different diameters (e.g., Φ8mm, Φ11mm, Φ25mm) can be selected; depending on the installation requirements, probes of different installation methods (e.g., upright, reverse, threadless) and 1m or 0.5m cable lengths can be selected.

DWQZ series extension cables

Both ends of the extension cable are equipped with SMA self-locking plugs, one end of which is fitted with an oil-proof protective sleeve to protect the self-locking plug from oil contamination, thereby improving system reliability. The extension cable is available in four lengths: 4m, 4.5m, 8m, and 8.5m. 

DWQZ series preamplifiers

The preamplifier is the core component of the system. It includes circuits for oscillation, linear detection, filtering, linear compensation, and amplification of the entire sensor system. Together with the extension cable and probe, it constitutes various specifications of DWQZ eddy current sensors. Based on the diameter of the probe used, the DWQZ preamplifier is available in three sizes: Φ8mm, Φ11mm, and Φ25mm. According to the total cable length (probe cable length + extension cable length), each size is further available in 5m and 9m versions.