DMC Magnetostrictive Displacement Transmitter (commonly called magnetic ruler) is a high-precision, long-stroke absolute position measurement device based on the magnetostrictive principle. It can measure linear displacement of moving objects while simultaneously providing analog signals for position/speed or liquid level signals. Depending on output types, it is categorized into analog and digital versions. Featuring flexible power supply options and multiple wiring/output configurations, it meets diverse measurement, control, and detection requirements. The non-contact measurement mechanism eliminates friction/wear caused by mechanical interactions, making it ideal for harsh environments and system engineering applications requiring minimal maintenance.

Characteristics of Magnetostrictive Displacement Transmitter:

1. High precision, stability, and reliability.

2. Non-contact measurement, extended service life, low power consumption.

3. Multiple configurable output options.

4. Reverse polarity protection capability.

5. Rapid scanning speed and high response sensitivity.

6. On-board diagnostics, open compatibility, real-time measurement.

7. Lightning surge protection and radio frequency interference (RFI) immunity.

8. Easy installation with no periodic calibration or maintenance required.

Working Principle:

The magnetostrictive displacement transmitter comprises a measuring rod, electronics housing, and a non-contact magnetic ring sliding along the rod. The rod contains a magnetostrictive waveguide wire. During operation, the electronics generate an initial pulse that travels along the waveguide wire, simultaneously creating a rotating magnetic field propagating forward. When this field interacts with the permanent magnet in the magnetic ring, the magnetostrictive effect induces torsional strain in the waveguide wire, generating a torsional pulse (or "return" pulse). This pulse is detected by the energy pickup mechanism within the electronics housing and converted into a corresponding current pulse. By calculating the time difference between the initial and return pulses, the system precisely determines position and displacement.

Technical Parameters:

Measurement Range: 150–3000 mm

Accuracy: ±0.05% FS

Operating Voltage: 12–30 V DC

Power Consumption: ≤2 W

Output Signal: 4–20 mA, Load Impedance ≤500 Ω

Insulation Resistance: 50 MΩ @ 500 V DC

Working Pressure: Max. 1.6 MPa

Junction Box Material: Stainless Steel

Rod Diameter Material: Ø13/304 Stainless Steel

Connection Type: Threaded

Ambient Temperature: -10℃ to +85℃

Protection Rating: IP65