The magnetostrictive liquid level transmitter is a new generation of high-precision liquid level measuring instrument developed based on the magnetostrictive principle. It boasts high accuracy, reliability, long lifespan, high stability, exquisite structure, strong environmental adaptability, and easy installation. Compared to other principle-based liquid level gauges, it has significant advantages. It can be widely used for liquid level monitoring, measurement, and control in various tanks, pools, and bins in the oil, chemical, food, and other industries.
This product complies with the requirements of GB3836.1-2000 "Electrical Equipment for Explosive Gas Atmospheres – Part 1: General Requirements" and GB3836.2-2000 "Electrical Equipment for Explosive Gas Atmospheres – Part 2: Intrinsic Safety 'i'".
1. Working Principle
The structural components of the magnetostrictive level gauge consist of stainless steel tubes (measuring rod), magnetostrictive wires (waveguide wire), and a movable float (with a magnet inside), as shown in Figure 1.
Figure 1 Structure of the Magnetostrictive Level Gauge
During the operation of the level gauge, the circuit part of the gauge generates a pulsed current on the waveguide wire, which, as it propagates along the wire, produces a pulsed magnetic field around it. A float is attached externally to the gauge rod, which can move up and down along the rod with the liquid level changes. Inside the float, there is a set of magnetic rings. When the pulsed magnetic field meets the magnetic field produced by the rings in the float, the magnetic field around the float changes, causing a torsional wave pulse to be generated at the position of the float by the waveguide wire made of magnetostrictive material. This pulse travels back along the waveguide wire at a fixed speed and is detected by the detection mechanism. By measuring the time difference between the pulse current and the torsional wave, the position of the float, i.e., the liquid level, can be determined.
2. Key Performance Features
Advanced principle, versatile functions, wide application range.
High precision, high stability, high reliability, high resolution.
Non-contact measurement, long lifespan.
Low power consumption, high performance-to-price ratio.
Isolation-type or intrinsically safe.
4-20 mA/HART two-wire system.
Elegant structure, strong environmental adaptability, anti-fouling, dust-proof, waterproof. (IP65)
Easy installation and maintenance.
No regular relabeling or maintenance required.
Wide voltage range compatibility and strong anti-interference capability.
Real-time measurement of liquid level and interface.
Features reverse polarity protection.
Protect against lightning strikes and radio frequency interference.
3. Technical Specifications
3.1 Power Supply: 12～24V DC
3.2 Operating Temperature: -40℃ to +350℃
3.3 Main Technical Performance Indicators
3.3.1 Range: 0.2m to 25m
3.3.2 Output Format: Standard 4~20mA
Response Time: Less than 1 second
3.3.4 Resolution: ≤0.05% FS
3.3.5 Non-linearity: ≤0.05% FS
3.3.6 Repeatability: ≤0.05% FS
3.3.7 Lag: ≤0.05% FS
3.3.8 Output Temperature Drift: 50 ppm/°C
Insulation Resistance: 50V, 50MΩ
3.3.10 Dustproof Grade: ExdⅡCT6Gb
3.4 Other Parameters
3.4.1 Material: Measuring rod material is 0Crl8Ni9, 1Crl8Ni9Ti; sealing material is nitrile rubber.
