Rf admittance level switches

Products overview:

ZW - L2000C seriesThe radio frequency admittance level switch is also often called radio frequency admittance switch, rf admittance and switch point control instrument.Products used for control and alarm limit, instrument widely used in industrial and civil field, suitable for most applications.Instrument consists of a circuit unit, and a set of explosion-proof enclosure and lever or rope type of sensors, sensor has a variety of types are optional.The instrument is optional or fission installation as a whole.

ZW - L2000C series rf admittance level switches can solve the problem of material adhesion, relative to other similar products with higher stability of the system.Even at the scene of the extreme conditions, reliable work, and there is no hanging, temperature, pressure, material density, humidity, and even the material characteristics of chemical change.220 v or 24 VDC power supply, the application of abundant with reliable performance, easy installation.

Second, the working principle:

ZW - L2000C series rf admittance level switch is a kind of developed from the condenser, hanging applicability broader, more reliable, more accurate, a new type of material level control technology, the capacitive material level technology upgrade.Radio frequency admittance switch emission must be applied to probe in the high frequency radio waves, to analyze and determine the container level changes.Radio frequency admittance switches to the different material agents, radio frequency change.Radio frequency admittance switch probe and container walls form a distance between the fixed capacitor grade two, probe of insulating material and the surrounding air insulating medium.Air is replaced by other media, the probe and the vessel wall of capacitance will change, this change will cause the role in the change of radio frequency admittance of switch probes the radio waves.This change has been detected by the radio frequency admittance switch internal wiring, compared with set values, determine the amount of change.When to set values at the same time, the switch output signal.

Applications:

Power plant, coal pile, the original coal, fuel storehouse, reservoir, exhaust gas purification tank, pump, ash library, tank, etc.;

Oil: crude oil or refined oil storage tank, three-phase separator, sedimentation tank, sewage tank, oil-water interface and drilling mud tank, etc.

Chemical industry: crude distillation tower, raw materials and intermediate bunker tank, reaction tank, ammonia, solid bin, separator, etc.;

Metallurgy: ore bin, ore crusher, raw materials warehouse, accessories warehouse, blast furnace, alumina powder storehouse, electrolytic cell buffer tank, etc.;

Cement: stone warehouse, pulverized coal bunker, cement warehouse, warehouse, slag storage warehouse, etc.;

Water treatment: reservoirs, sewage pool, cans, sedimentation tank, deep well water treatment, drinking water network, etc.;

Paper: raw materials warehouse, towers, drum drying, chemical storage materials storage warehouse, etc.;

Other: quarry, food, pharmaceutical, environmental protection, shipbuilding and other industries.

Four, the main features:

1, strong commonality: measuring liquid level and material level, can satisfy the measurement requirements of different temperature, pressure, medium, zui high temperature is 800 ℃, zui up to 5 mpa pressure, and can be applied to negative situations, such as corrosion, impact.

2, prevent hanging: unique circuit design and the sensor structure, can make its measurement is not affected by sensor hanging, without regular cleaning, avoid measurement by mistake.

3, avoid d n: measurement process is no moving parts, no mechanical parts damaged problems, do not need to maintain.

4, dry anti-disturbance: non-contact measurement, anti-interference ability is strong, can overcome the steam, foam and mixing effect on the measurement.

5, accurate and reliable: measuring amount of diversification, makes the measurement more accurate, measurement is not affected by climate change, high stability, long service life.

Five, the technical parameters:

1, work power: 24 VDC;220 vac.

2, relative humidity: 85% or less.

3, the output signal: two sets of normally open, normally closed contacts;

4, contact capacity: AC220V, 5 a;DC24V, 3 a,

5, environmental temperature range: - 40 ℃ ~ + 60 ℃;

6, medium temperature: 180 ℃ ~ + 200 ℃;

7, delay time: 0.2 S (0.2 ~ 30 S adjustable);

8, protection grade: IP65;

9, probe material: stainless steel 316, tetrafluoroethylene;

10, explosion-proof level: ExdIIBT4;

11, connection mode: 3/4 "NPT thread;3/4 "pipe thread;Flange (optional);1-1/2 "pipe thread;

12, installation method: top loading, side loading.

Six, switch installation requirements:

1, radio frequency admittance switch can be installed vertical and horizontal.

2, when installation, must guarantee that the center of the sensor sheath maerial and shielding layer and vessel wall (or installation) each other contact, good insulation, install the threaded connection is firm, with the walls and electrical connection is good, and probe the shield will enter inside the container.

3, with stirring, probe need to support or anchor fixation (fixed end to probe insulation), horizontal instrument service entrance must be down, and the vertical line explosion-proof pipe installation must't bottom line port of mouth, in case of explosion-proof pipe water endanger instrument electronic unit.

4, according to the requirements of explosion-proof instrument installation, wiring of each connected with explosion-proof enclosure must be equipped with a certified seal of stuffing box or explosion-proof steel tube seal joint.

5, certification of seal stuffing box or explosion-proof pipe seal joint product please consult our company and the agent.Instrument installation area requires the lightning protection device, in case of a lightning strike.

6, 24 VDC power supply ripple shall not be greater than 200 mv.

7, power supply ground wire to meet the standard or standard instrument, do not pick up on the floor in power.

Seven, notable matters of installation:

1, the installation location not being too close to the mouth, otherwise, when the material easy to receive fake echo.

3, for the original coal cylindrical, shall be installed in the cylinder radius in half, the sensor should be aimed at discharging port.

3, connection

Level switches required for different voltage grade are different according to the model, in order to ensure the personal safety and equipment in good condition, should be in the case of power wiring.

Connection mode is divided into two wire system and four wire system,

We collected is 4-20 ma current signal, to prevent electromagnetic interference on site, ensure the accuracy of signal, should use shielded cable, shielding grounding cable end.

Eight,Selection of code:

Nine, sensor selection table:

Note: 1, PTFE teflon;More than 2, as the standard length, according to the users can switch the length of the production.

Ten, design selection and ordering information:

1, liquid level control device specifications;

2, measurement range;

3, working pressure, and temperature;

4, control device for 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:

1, my company the liquid level switch series of products are sold within 12 months appear quality problem, is responsible for free maintenance.

2, the warranty period, any quality problems such as the products of our company, my 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.