59 visiting now: 43 China China flag 9 USA USA flag 3 India India flag 2 Singapore Singapore flag 1 France France flag 1 Germany Germany flag

Highlighted Companies

  • Eagle Eyes China Inspection Company (China): Eagle Eyes (CHINA) Quality Inspection Co.,Ltd. is a professional Third Party China Inspection company, offering...
  • High Efficiency Automatic Ovality Measuring Instrument Gdc J2200 Jx - China

    price: contact company for price

    Maximize your precision and productivity with our High Efficiency Automatic Ovality Measuring Instrument.

    This state-of-the-art tool is designed to offer unparalleled accuracy and efficiency in measuring the ovality of cylindrical objects, making it ideal for high-precision applications in manufacturing and quality control.

    Purpose: Real-time online inspection of geometric dimensions of high-speed wire rods, square steel, flat steel, etc.

    in a red-hot state, and transmit the inspection results to the display terminal in real time.

    When the measurement data is abnormal, the system will issue an audible and visual alarm.

    Provide intelligent appearance and dimensional inspection services for rolled steel.

    Parameter Specification

    Measured object varieties rods and wires, square steel, flat steel

    Measurement principle laser scanning method

    Measurement method rotary measurement

    Measurement frequency 800–1600

    Rotation speed 30 rpm

    Installation method fixed or mobile

    Standard equipment configuration The entire set of equipment comes standard: control cabinet, measuring vehicle, electrical control box, LED display, cooling and dust removal system and supporting facilities

    Adaptable rolling speed ≤120m/s

    Adaptable rolling temperature ≤1200℃

    Measuring range 5–200mm

    Allowable deviation ≤±0.04

    Installation location after intermediate rolling mill or finishing rolling mill

    How This Rotary Diameter Gauge Works: Laser Scanning Principle

    The GDC-J2200-JX rotary diameter gauge uses the laser scanning diameter gauge method — a rotating head continuously sweeps laser beams around the bar's full cross-section.

    Unlike fixed instruments, this rotating diameter measuring instrument eliminates blind spots entirely, making it the most reliable solution for online steel bar measurement in high-temperature rolling environments.

    1 - Laser beam projection

    High-frequency laser beams are projected across the bar's cross-section as the measurement head rotates continuously around the pass line.

    2 - Photoelectric scanning & triangulation

    Precision photoelectric receivers capture the shadow width at each rotational angle.

    Triangulation algorithms calculate exact dimensional coordinates.

    3 - Real-time data transmission

    Measurement results are transmitted to the display terminal via single-mode fiber optics.

    Alarms trigger instantly when any dimension exceeds tolerance.

    4 - Full ovality calculation

    With 360° data, the system calculates diameter, ovality, and profile deviation simultaneously — not possible with fixed-angle gauges.

    What Can This Laser Scanning Diameter Gauge Measure?

    As a rotating diameter measuring instrument, the GDC-J2200-JX covers the full range of hot-rolled long products in bar & wire rod mills.

    One rotary diameter gauge handles multiple product profiles with software-selectable measurement modes — making it the most versatile solution for online steel bar measurement.

    Round Bar:Primary application.

    Full-circle diameter measurement at every cross-section.

    Flat Bar:Width & thickness measurement.

    Oscillating mode captures dimensional variation across the full profile.

    Square Bar:Side-length measurement for square billets.

    Detects asymmetric deviation in real time.

    Wire Rod:High-speed measurement up to 120m/s.

    Ideal for wire rod finishing blocks on bar & wire mills.


    Company Contact:


    • Phone: 022 23783384

    • Address: K1-4, No.6 HaiTai development 6th road, green industry base, Huayuan industrial zone, Tianjin , Tianjin , China

    • Email: Email


    Published date: March 30, 2026

    • Business Description: Eastloong Measurement & Control Technology Co.,Ltd. is a professional company to provide the overall measurement scheme for the long steel rolling production line.

      It was founded in 2004 and is located in the beautiful Tianjin High tech Industrial Zone, a green industry base called the "National Software Industrial Park".

      It is composed of optical measurement experts and professional technical talents in optics, machinery, electronics, software, computer, and other fields.

      It is a specialized company that integrates research and development, production, sales, installation, and after-sales service.

      The first domestic photoelectric camera diameter gauge (in 2000), the first laser scanning swing diameter gauge (in 2018), the first rotary diameter gauge (in 2021), the first surface defect detector (in 2022) , and the first rebar measurement instrument(in 2023) were all born in Eastloong.

      The company takes research and development as the leader and quality as the guarantee, with over one hundred patents and software copyrights.

      For many years, Eastloong has been innovating and developing in the field of steel rolling measurement with a focused spirit and enterprising attitude, and has been highly praised by customers.

      Now more than 600 gauges have been installed the steel rolling line in such as Baosteel, Ansteel, Hebei steel, Jianlong group, Shougang steel, Tata steel, JFE, Valin steel ,Shandong steel,etc.

      in many countries.

      Eastloong will still focus on steel rolling measurement ,provide the best service for global steel enterprises.

    Related listings



    • Real Time Online High Frequency Detection Detector Bqj D430
      Real Time Online High Frequency Detection Detector Bqj D430
      Equipment - TIANJIN EASTDRAGON PHOTOELECTRICITY CO.,LTD - China - March 30, 2026 - contact company for price

      Purpose: Take all-round photography of rods and wires, bar steel, square steel, rebar, etc. in a red-hot state, generate complete surface images, analyze and classify identified defects, and provide intuitive visual feedback on the surface quality of...

    • Tubing Thread Protectors
      Tubing Thread Protectors
      Equipment - Liuzhou Biaohuang Machinery Equipment Co.,Ltd - China - March 26, 2026 - 1.00 Dollar US$

      Tubing thread protectors are caps protect Tubing threads and seals during loading, unloading, transportation and storage Color: Black Material: Steel Plastic Standard: API Industries: Energy & Mining Application: Tubing PRODUCT DESCRIPTION Tubing...

    • Bhjg230 Bucking Machines
      Bhjg230 Bucking Machines
      Equipment - Liuzhou Biaohuang Machinery Equipment Co.,Ltd - China - March 26, 2026 - 1.00 Dollar US$

      Color: White Green Material: Carbon Steel Standard: API Industries: Energy & Mining Machinery Application: Casing Tubing Petroleum PRODUCT DESCRIPTION BHJG230 torque machine has six parts: driving clamp system、backup clamp system、hydraulic system...



    Safe Trade Tips

    • Ask for business references and check them
    • Use a payment method that offers better protection for all such as Letters of credit and verified professional escrow services. Avoid payments in advance such as money transfers
    • Verify their business via their local Chamber of Commerce
    • Search the internet using their website address, their business name, their phone and fax numbers, and their email addresses to see if you can find any feedback about them.
    • Get to know more about scams and fraud to avoid: Internet Crime Complaint Center - Consumer Financial Protection Bureau
    • This site is never involved in any transaction, and does not handle payments, shipping, guarantee transactions, provide escrow services, or offer "buyer protection" or "seller certification"