Explosion-proof magnetostriction level gauge

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The explosion-proof magnetostrictive level gauge is suitable for the measurement of clean liquid lev…

Products overview:

ZW - CZS seriesExplosion-proof type magnetostrictive liquid level meterWith low power consumption MCU and high precision digital conversion components, direct measurement and calculation of digital temperature sensor, the measured results in the form of digital output, and can be transmitted over a long distance with excellent anti-interference performance of modular design is exquisite, realize the installation site is not clear tank maintenance, reduce the maintenance cost standard thread or the flange connection, installation is simple and quick.

Second, the working principle:

ZW - CZS series explosion-proof type magnetostrictive liquid level sensor, the sensor circuit part will inspire a pulse current on waveguide wire, wire when the current wire along the waveguide propagation in the waveguide of impulse current magnetic field generated around.Outside the sensor rod is equipped with a float, the float along the rod can move up and down along with the change of liquid level.There is a group of circular and inside the float.When the impulse current magnetic field when they met with float copper produced by the magnetic field, the magnetic field around the float is changed so as to make the wire made of magnetostrictive materials waveguide in float position to produce a torsion wave pulse, the pulse at a fixed speed along the waveguide wire back and detected by the detection institution.By measuring the transmitted pulse electric current and time lag of the torsion wave can accurately determine the position of the float is located, namely on the surface of the liquid position.

3, general structure:

1 - waveguide;2 - inspcetion;3 - measuring head;4 - liquid level;5 - tanks;6 - interface;

Consists of three parts: the detection lever, circuit unit and float.Measurement, the circuit unit to produce electric current pulse, the pulse along the line of magnetostrictive downward transmission, and produces a circular magnetic field.Outside the probe is equipped with a float, float along the probe pole to move up and down with the change of liquid level.Because of the float is equipped with a set of magnets, so float and produce a magnetic field.When electric current magnetic field is met, and float to produce a "twisted" pulse, or "return" pulse.Will "return" pulse and current pulse time difference into the pulse signal, and float the actual location of the measured liquid level is calculated.

Four, applications:

ZW - CZS series explosion-proof type magnetostrictive liquid level meter structure parts made of stainless steel tube (rod), magnetostrictive wire (silk) waveguide, removable float (with magnet), and other parts.In addition to the product has the characteristics of the magnetostrictive level indicator of analog output, due to the expanding its function, the use of more flexibility and stronger environmental suitability.Apply to oil, chemical raw materials storage, industrial process, biochemical, pharmaceutical, food and beverage, the terminal and gas station underground inventory and other various kinds of tank liquid level industrial measurement and control, water level of dam, reservoir water level monitoring and sewage treatment, etc.

Five, the main features:

1, reliability: because of the magnetostrictive liquid level meter adopts waveguide principle, no mechanical moving parts, no friction, no wear and tear.The converter closed in stainless steel tube, and measure the medium non-contact, sensor reliable operation, long service life.

2, high precision, because of the magnetostrictive liquid level meter with waveguide pulse work, work by measuring the initial pulse and termination of the pulse time to determine the measured displacement, so the measurement precision is high, resolution is better than the 0.01% FS, it is difficult to achieve with other sensor's precision.

3, good security, magnetostrictive liquid level meter of explosion-proof performance is high, the explosion-proof, use safety, especially suitable for measurement of chemical raw materials and flammable liquids.You do not need to open the cover when measuring, avoid artificial measurement of insecurity.

4, magnetostrictive liquid level meter is easy to install and maintain simple, magnetostrictive liquid level meter, generally through the roof for pipe installation, especially suitable for the underground storage tank and tank installation has was put into operation, and during the installation process does not affect the normal production.

5, easy to automated systems work: magnetostrictive liquid level meter of secondary instrument with a standard output signal, facilitate microcomputer for signal processing, easy to implement networking work, improve the degree of automation of the whole measuring system.

Six, the technical parameters:

1, the digital signal output liquid level sensor:

Oil level, water level and temperature data output one to five

Measuring range: 0.2 ~ 6 m;

Repeat: precision is better than 0.001% FS.

Non line: 0.05% FS.

In distinguishing rate: 150 microns;

Output mode: Rs - 485;

Power supply: 15 ~ 30 VDC;

Explosion-proof grade: Exd Ⅱ BT5 Exia Ⅱ AT5 Exia Ⅱ BT5;

Temperature coefficient: gad: - 40 ℃ ~ 120 ℃;

Electronic storehouse: - 20 ℃ ~ 75 ℃;

Job stress: floating ball: 3.2 MPa;

Rod material: 0 cr18ni9, 1 cr18ni9ti.

2, analog signal output liquid level sensor:

Range: 50 ~ 7000 mm;

24 VDC power supply: + / - 10%;

The output format: 4 ~ 20 ma;0 ~ 5 v.0 ~ 10 v.

Working temperature: electronic warehouse: - 40 ℃ ~ + 85 ℃ (zui large range);

Rod: - 40 ℃ ~ + 110 ℃ (zui large range);

The output temperature drift: 50 PPM / ℃;

The power consumption of the product: less than 60 ma;

Working pressure: 3.2 MPa floating ball;

The output ripple: less than 20 mv;

Linear error: better than 0.05% FS.Range of sensors is less than 300 mm, the error is less than 150 microns;

Repeatability error: better than 0.002% FS.

Load capacity: 4 ~ 20 ma output: not less than 500 Ω on load capacity;

0 ~ 5 v, 0 ~ 10 v output: zui big output impedance is less than 20 Ω;

Rod material: 0 cr18ni9, 1 cr18ni9ti, or user special custom;

Electronic pod shell material: 1 cr18ni9ti or user special custom;

Floating ball material: 1 cr18ni9ti, cr17ni12mo2 0, 0 cr17ni14mo2;

Connection: M18 * 1.5, 1.5, M20 3/4-16 unf - 2 a (or the user special customization);

Explosion-proof type: Exd Ⅱ BT5.

Seven, use notice:

1, order, or before installation, the user should first understand the installation site conditions, provide installation site environment temperature, shock, vibration and pressure and size as liquid level sensor parameters such as the installation of the permissible range.

2, the application of products, anti-corrosion and function selection.

3, rod cannot bend, after use, should be put back to the product packaging tube.

4, liquid level sensor, electronic storehouse and rod, the end does not allow the big impact or vibration.

5, liquid level sensor cannot be directly used to have a chemical reaction or other damage to liquid level sensor is flammable, explosive, corrosive, steam and liquid, etc, have protective measures to protect as needed.

6 splash, liquid level sensor, electronic components but not submerged, must not let the liquid immersion to hexagon above base.

7, installed, deal with to protect electronic storehouse.

8, liquid level sensor shielded cables must avoid high-power power, radio frequency signal source, and other such as noise of the transmission line.

9 there can be no interference, sheath maerial installation place, such as mixer, into the mouth.Sheath maerial of bending force, not allowed by the larger impact or vibration.Sheath maerial inspcetion should be free to slide up and down, not is blocked by other objects.

10, level gauge must be installed vertically, the installation Angle shall not be greater than 5 degrees.Installation of floating ball markers of the hemisphere should be above the liquid level.Lower limit of a locking ring, locking ring should mark and bar at the bottom of the upper line level.

Eight, selection considerations:

1, level gauge type selection should be consistent with the medium environment, including environmental temperature, pressure, vibration, impact, structure, material compatibility with medium, etc.

2, measured medium at high temperature (100 ~ 200 ℃), recommend selecting out-of-band buoy type probe (selection table option B), using the side flange installation.At higher temperature (200 ~ 300 ℃), recommend selecting out-of-band buoy side bundle type probe (selection table option C), using the side flange installation.

3, measuring sheath maerial of both ends up and down with dead zone, choosing range should be considered.

4, level gauge the size of the commonly used stainless steel inspcetion for 45 * 56 * Ф Ф 15, should choose (and more flange connection.Liquid level gauge for selection of screw thread connection, the user need since with flange or bracket installation.

Nine, installation requirements:

1, the magnetostrictive liquid level meter is usually installed at the top.

2, sheath maerial installation place there can be no interference, such as mixer, into the mouth.

3, sheath maerial of bending force, not allowed by the larger impact or vibration.Sheath maerial inspcetion should be free to slide up and down, not is blocked by other objects.

4, level gauge must be installed vertically, the installation Angle shall not be greater than 5 degrees.

5, the level of the steam and in inflammable, explosive, corrosive liquid such as occasion when using, must have protective measures to protect.

6, liquid level meter connection cables must avoid high-power power, radio frequency signal source, and other such as noise of the transmission line.

Note: ten, liquid level meter wiring

1, wiring to avoid the large capacity of transformer, motor or interference sources.

2, for explosion-proof type, in order to ensure explosion protection performance, must be in accordance with the relevant provisions of the wiring.

3, unscrewed the connector wiring end cover, the cable through the cable joint, connected to 24 VDC +, - on both ends.

4, according to the need to grounding terminals.

5, tight junction box of the wiring end cover.

Eleven, parameter table:

Twelve, selection of coding:

Note:1, please indicate when matching flange flange material matching other specifications of the flange, please provide detailed drawings; 
2, you need to provide other connection thread is in the order of money.

13, design selection and ordering information:

1, model specifications;

2, measurement range;

3, working pressure, and temperature;

4, plant material;

5, special requirements;

6, whether level device matching supply vessel flange, bolts, nuts, valves and fittings such as sealing washer, so that the correct selection.

After-sales service commitment:

Level 1, I companies sell products within twelve months appear quality problem, is responsible for free maintenance.

2, the warranty period, such as the products of our company,,, any quality problem, our company is responsible for free repair or replacement.

3, the warranty period, such as user improper use, damaged products, my company is responsible for the maintenance, charge damage parts cost.

4, after the warranty period appear quality problem, my company is responsible for the maintenance, charge damage parts cost.

5, such as user need to my company site services, to users in the province I company service personnel to reach the site within 12 hours, fujian association of foreign languages and user reach the site within 48 hours.