Position Transducer for Rolling Mill Screwdown Systems

Product Specifications

Technical details and manufacturing context for Position Transducer

Definition

In a Heavy-Duty Rolling Mill Hydraulic Screwdown System, the position transducer is a critical feedback component. It is directly coupled to the screwdown mechanism to precisely measure the vertical position of the work rolls. This real-time position data is essential for the mill's control system to maintain accurate roll gap settings, ensure consistent product thickness (gauge), and execute automated rolling schedules. The transducer is designed for harsh industrial environments, featuring a stainless steel housing (material grade 316L per ASTM A240) and a protection class of IP67 per IEC 60529, making it resistant to dust and water ingress. It operates on magnetostrictive, LVDT, or laser/optical principles, with the magnetostrictive type being common. In a magnetostrictive transducer, a magnetic position marker moves along a waveguide. An electrical pulse sent down the waveguide interacts with the marker's magnetic field, generating a torsional strain wave. The time delay between the pulse and the detected return wave is measured to calculate the exact linear position with high accuracy and repeatability. The device offers a measuring range of 0–1000 mm (custom ranges up to 2000 mm available), linearity error of ±0.05% FS, repeatability of ±0.01% FS, and a 4–20 mA output signal. It operates on a 24 V DC supply (±10%) and is reverse polarity protected. The operating temperature range is -40 to 85 °C, with extended range optional. The approximate weight is 1.5 kg, varying with range. For selection, consider the required measuring range, accuracy, output signal type, and environmental conditions. Verify model-specific values and standards with the legal manufacturer or supplier before procurement. The transducer is a component, not a standalone system, and must be integrated with the mill's control system. Regular maintenance includes checking for mechanical wear, electrical connections, and signal integrity. Failure modes include signal loss, drift, or mechanical damage, which can lead to incorrect roll gap settings and product quality issues.

Working Principle

The position transducer typically operates on magnetostrictive, LVDT, or laser/optical principles. In a magnetostrictive transducer, a magnetic position marker moves along a waveguide. An electrical pulse sent down the waveguide interacts with the marker's magnetic field, generating a torsional strain wave. The time delay between the pulse and the detected return wave is measured to calculate the exact linear position of the marker with high accuracy and repeatability.

Common Materials

Stainless Steel Housing, Waveguide (Magnetostrictive Wire), Electronic Circuitry

Technical Parameters

Parameter	Typical range	Notes & selection driver
Measuring Range	0–1000 mm	Custom ranges available up to 2000 mm
Linearity Error	±0.05 %FS	Higher accuracy available on request
Repeatability	±0.01 %FS	Ensures consistent positioning
Output Signal	4–20 mA	Two-wire loop powered
Supply Voltage	24 ±10% V DC	Reverse polarity protected
Operating Temperature	-40–85 °C	Extended range optional
Protection Class	IP67	Suitable for harsh environmentsIEC 60529
Housing Material	316L	Corrosion resistantASTM A240
Weight	1.5 kg	Approximate, varies with range

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Sensor Head / Electronics Module
Generates the interrogation pulse, detects the return signal, and converts the time measurement into a standardized output signal.

Material: Aluminum/Stainless Steel Housing, PCB with electronic components
Waveguide / Sensing Element Part
The core element (e.g., magnetostrictive wire) along which the position measurement takes place.

Material: Special alloy (e.g., Ni-Span C)
Position Magnet / Target
Moves with the screwdown mechanism. Its magnetic field interacts with the waveguide to mark the measurement point.

Material: Permanent Magnet (e.g., Samarium Cobalt), Stainless Steel Housing
Protective Housing / Rod Part
Provides mechanical protection for the internal components from impact, coolant, and scale.

Material: Stainless Steel (e.g., 304, 316)

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Hydraulic Actuator Cylinder

View system integration details

Manufacturers of Position Transducer

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Shanghai Ziasiot Technology

Shanghai, CN

Also makes: Signal Processor, Pressure Gauge/Sensor, Water Level Sensor and 9 more

Listed on the company's own website · profile compiled by CNFX from public sources

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is the typical measuring range of this position transducer?

The standard measuring range is 0–1000 mm, with custom ranges available up to 2000 mm. The exact range must be confirmed with the manufacturer for your specific application.

What output signal does the transducer provide?

The transducer provides a 4–20 mA output signal, which is a standard industrial analog signal for position feedback. It is two-wire loop powered.

What is the protection class of the transducer?

The protection class is IP67 per IEC 60529, meaning it is dust-tight and protected against temporary immersion in water. This makes it suitable for harsh industrial environments.

How does the magnetostrictive principle work?

In a magnetostrictive transducer, a magnetic position marker moves along a waveguide. An electrical pulse sent down the waveguide interacts with the marker's magnetic field, generating a torsional strain wave. The time delay between the pulse and the detected return wave is measured to calculate the exact linear position.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Buyer enquiry

Request manufacturing insight for Position Transducer

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

pressure:	0 to 300 bar
other spec:	IP67 ingress protection, 0.01% linearity error
temperature:	-40°C to +85°C

Position Transducer

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards