MDS-F Magnetostrictive Liquid Level SensorDetailed product description：

1、 Overview
The magnetostrictive liquid level sensor (magnetic ruler) is developed using "magnetostrictive" technology. This technology was first developed by an American company in 1975. It has been widely used internationally in liquid level measurement systems that require high measurement accuracy and reliability. It has the characteristics of high precision, high resolution, good repeatability, stability and reliability, non-contact measurement, long service life, easy installation, and strong environmental adaptability. Its output signal is a true absolute position output, rather than a proportional or amplified signal, so there is no signal drift or variation, and therefore there is no need for regular recalibration and maintenance like other liquid level sensors; It is precisely because its output signal is an absolute value that even if the power supply is interrupted and reconnected, it will not pose a problem for data reception, let alone returning to zero. It can be widely used for liquid level measurement and control of various tanks in industries such as petroleum, chemical, power, pharmaceuticals, food, and beverages.

2、 Working principle
The working principle of magnetostrictive liquid level sensor (magnetic ruler) is shown in Figure 1. This product mainly consists of a measuring rod, an electronic chamber, and a non-contact floating ball (with a magnet inside) mounted on the measuring rod. The measuring rod is equipped with a magnetostrictive tube (waveguide) and is made of non-magnetic stainless steel tube, which reliably protects the waveguide. When working, a starting pulse is generated by the electronic circuit inside the electronic chamber. When this starting pulse is transmitted in the waveguide, a rotating magnetic field is generated along the direction of the waveguide. When this magnetic field meets the permanent magnetic field in the magnetic ring, a magnetostrictive effect is generated, causing the waveguide to twist. This twist is sensed and converted into corresponding current pulses by the energy pickup mechanism installed inside the electronic chamber. The time difference between the two pulses can be calculated by the electronic circuit to accurately measure the liquid level height of the measured medium.

Working principle diagram of magnetostrictive sensor (magnetic ruler) 1


4、 Characteristics

1. Non contact measurement	2. High precision, high stability, high reliability
3. Long service life	4. Multiple signal output modes to choose from
5. Equipped with reverse polarity protection function	6. Lightning protection and radio frequency interference prevention
7. Exquisite structure and strong environmental adaptability	8. No need for regular re labeling and maintenance
9. Can monitor the liquid level of pressurized or unpressurized tanks	10. Isolation explosion-proof (optional)
11. Easy to install

5、 Application Fields

1. Industrial field liquid level measurement and control	2. Oil tank level measurement
3. Liquid level control in chemical processes	4. Pharmaceutical tank liquid level control
5. Food and beverage liquid tank control	6. Dam water level monitoring
7. Drinking water and sewage treatment, etc

6、 Main technical parameters

Range A	50-18000mm (can also be customized according to user requirements)
B output form	1. Simulate output signal	0 ～ 5V/+24VDC + 10%
		0 ～ 10V/+24VDC + 10%
		（ -5 ～ +5 ） V/ + 15VDC + 10%
		（ -10 ～ +10 ） V/ + 15VDC + 10%
		4-20mA/+24VDC + 10%
	2. Digital signals	Asynchronous communication binary (RS485 Modbus)
C Performance indicators	1. Nonlinear error	Better than 0.05% FS
	2. Repetitive error	Better than 0.01% FS
	3. Resolution	Better than 0.01% FS
	4. Zero adjustment range	20%FS
	5. Full adjustment range	10%FS
	6. Frequency response time	0.2 ～ 5ms
D working temperature	T 1 ： 0 ～ 70 ℃T 2 ： -25 ～ + 80℃T 3 ： -40 ～ + 85 ℃
E structural characteristics	1. Measuring rod material	0Cr18Ni9 (304), 316L stainless steel (specially customized), 304 outer PTFE anti-corrosion sleeve (anti-corrosion type) Electronic warehouse shell material: 1Cr18Ni9 (304), 1Cr18Ni9Ti outer shell nylon protective cover (anti-corrosion type)
	2. Connection form	Threaded connection: M18 × 1.5, M20 × 1.5, 3/4-16UNF (British) flange connection: (specific specifications see attached diagram) flange material: 1Cr18Ni9Ti polytetrafluoroethylene (anti-corrosion type)
F lead method	PVC shielded cable (default length: 3m, can also be provided according to user requirements) aviation plug (not applicable to explosion-proof products), terminal block
G Explosion proof mark	Explosion proof type: EXd Ⅱ BT5
H shell protection level	IP65