CIRCOFLUX DA Sensor System Ro 140

High-precision flux leakage testing for diameters up to 140 mm

Optimized for precise flux leakage testing of common bar diameters. The Ro 140 sensor system is designed for diameter ranges from 10 mm to 140 mm within the CIRCOFLUX DA product family and is particularly suited for reliable surface inspection of hot-rolled ferromagnetic bars in rolling mills and in quality assurance of bars in forging quality.

The system operates using the AC magnetic flux leakage method (AC-MFL) in accordance with DIN EN ISO 9443 and enables reproducible detection of longitudinal, crack-like surface defects from depths of 0.10 mm. Subjective inspection methods such as magnetic particle testing or visual inspection can therefore be reliably replaced.

With an inspection range from 10 mm to 140 mm, the Ro 140 sensor system covers a wide spectrum of typical production applications. The optional automatic size adjustment allows fast and reliable adaptation to different material diameters.

Maintenance-free inductive signal transmission ensures high system availability while reducing wear. In combination with the FOERSTER DA platform electronics, the system provides reproducible inspection results, integrated diagnostic functions, and intuitive operation.

The Ro 140 sensor system can also be combined with the FOERSTER BARPROOF 140 ultrasonic testing system, enabling reliable detection of internal defects in addition to surface inspection.

Product highlights

Your advantages at a glance

  • Reliable defect detection: High-precision detection of longitudinal surface defects from depths of 0.10 mm
  • Standards compliance: Standards-compliant inspection of hot-rolled bars according to DIN EN ISO 9443
  • Wide inspection range: Inspection range from 10 mm to 140 mm for typical rolling-mill applications
  • High resolution: 2 × 40 inspection channels for high resolution and reproducibility
  • Automated changeover: Automatic size adjustment reduces changeover time and minimizes setup errors
  • Inline inspection: Inline-capable inspection at feed speeds up to 4 m/s
  • Detailed result visualization: High-resolution C-scan visualization of inspection results
  • Maximum usable length: Reduced untested bar ends for maximum usable inspection length
  • High reproducibility: Reproducible inspection results through automatic calibration routines
  • Unified user interface: Unified FOERSTER DA platform for easy operation and integration
  • Digital integration: Standardized inspection data and open interfaces for digital production environments
  • Future-proof technology: AI-ready for future AI-based analysis and assistance functions

Norms

  • DIN EN ISO 9443
    Describes the technical delivery conditions for hot-rolled steel bars and wire rod. The magnetic leakage flux method with probes is recommended.

Technical information

Diameter range: 10 – 140 mm Ø
Maximum noise level: 70 dB (A)
Drive motor power: 4,1 kW
Variable rotational speed: 0 – 1500 U/min

Slow-down time with breaking (depent on rotational speed):

 approx. 60 seconds at maximum rotational speed

Scanning track width:

 160 mm

Max. transportation speed (dependent on test material diameter):

 4 m/s

Set-up time with roller guide:

approx. 3 minutes (with automatic dimension adjustment approx. 1.5 minutes)

Additional set-up time for inner roller guide:

 approx. 5 minutes

Weight without roller guide:

 approx. 850 kg

Number of test heads:

 2

Max. number of testing channels

 2 × 40

Signal transmission:

 inductive transmitter

Frequency of magnetizing current:

 7,5 kHz

Transmission of the magnetizing current:

 inductive transmitter

Power consumption:

 4,2 kVA (230 V) and 7,5 kVA (400 V)

Connection to electricity network:

 TN system

With automatic dimension
adjustment rotating disc:

 no compressed air required, adjustment via electric cylinder and positioning unit

Specification of test material:

 Ferromagnetic bars and tubes with a round surface (bright, peeled, or hot-rolled), free of loose scale, chips, and protruding burrs. Test piece ends must be burr-free, cut square to the bar axis, and free of cross-sectional deformation. Liquids and grease are not permitted.

Specification of test material –
Ambient temperature:

 5 °C bis 45 °C

Specification of test material –
Maximum relative humidity:

 85 %

Specification of test material –
Temperature of test material:

 5 °C to 80 °C

Downloads

Flyer CIRCOFLUX DA sensor system Ro 140 — 236 KB High-precision testing of ferromagnetic steel bars for longitudinal crack-like defects

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