MKSD500 series RF admittance level meter

MKSD500 series RF admittance level meterIt is a novel level measuring instrument that uses * radio frequency admittance technology to overcome the defect of capacitive level meters that cannot eliminate the influence of conductive hanging materials. The instrument has reliable operation and is suitable for almost all industrial sites. Instruments also have the characteristics of easy installation, maintenance free, and low price, and are widely used in industrial fields such as petroleum, chemical, metallurgical, pharmaceutical, power, food, paper, etc.

summary:MKSD500 series RF admittance level meter
The important difference between this product and capacitive technology lies in the diversity of measurements and anti hanging material technology. The diversity of measurement quantities for RF admittance level switches lies not only in measuring capacitance, but also in measuring the comprehensive quantity of capacitance, resistance, and inductance, making the measurement more comprehensive and accurate. Anti hanging material technology involves adding a shielding electrode between the measuring electrode and the electrode to protect the measuring electrode from hanging materials.
Radio frequency admittance solves the problem of material adhesion and has higher system stability compared to other similar products. Even under harsh on-site conditions, it can work reliably without being affected by hanging materials, temperature, pressure, material density, humidity, or even changes in material chemical properties. Powered by 220V or 24VDC, it has been widely used due to its reliable performance and easy installation.


Measurement principle:
Radio frequency admittance is a new level control technology developed from capacitive technology, which is anti hanging, more reliable, accurate, and widely applicable. It is an upgrade of capacitive level technology. The so-called radio frequency admittance refers to the reciprocal of impedance in electricity, which is composed of resistive, capacitive, and inductive components. Radio frequency is the spectrum of high-frequency radio waves, so radio frequency admittance can be understood as measuring admittance using high-frequency radio waves. When the instrument is working, the sensor of the instrument forms an admittance value with the tank wall and the measured medium. When the level changes, the admittance value changes accordingly. The circuit unit converts the measured admittance value into a level signal output to achieve level measurement.
Working principle of Jiangsu RF admittance level meter:

The level switch consists of a sensor unit and an electronic unit. The sensor unit mainly consists of three parts: measuring probe, shielding electrode, and grounding terminal. The height of the material is reflected by the change in admittance between the probe and the container wall. When the material reaches the switch operating point, the electronic unit reacts, drives the relay to operate, and outputs a switch signal. Shielding electrodes can prevent misoperation signals caused by hanging materials on the electrodes. The relay only outputs a signal when the material truly reaches the set point.


Application medium:
1. Power plant: coal pile, raw coal bin, fuel bin, reservoir, exhaust gas purification tank, bin pump, ash silo, fuel tank, etc;
2. Oilfield: crude oil or finished oil storage tanks, three-phase separators, settling tanks, sewage tanks and oil-water interfaces, drilling mud tanks, etc;
3. Chemical industry: crude oil distillation tower, raw materials and intermediate silos, reaction tanks, ammonia tanks, solid silos, separators, etc;
4. Metallurgy: ore silo, ore crusher, raw material silo, auxiliary material silo, blast furnace, alumina powder silo, electrolytic cell buffer tank, etc;
5. Cement: stone silo, raw material silo, cement silo, coal powder silo, slag storage silo, etc;
6. Water treatment: reservoirs, sewage tanks, water treatment tanks, sedimentation tanks, deep wells, drinking water networks, etc;
7. Paper making: raw material warehouse, storage tower, drying drum, chemical material storage warehouse, etc;
8. Other industries include quarries, food, pharmaceuticals, environmental protection, shipbuilding, etc.

Performance characteristics:
1. Strong universality: It can measure liquid and material levels, meet the measurement requirements of different temperatures, pressures, and media, with high measurement temperatures up to 800 ℃ and high pressures up to 5Mpa, and can be applied to harsh environments such as corrosion and impact.
2. Anti hanging material: The circuit design and sensor structure of * ensure that its measurement is not affected by sensor hanging material, and there is no need for regular cleaning to avoid measurement errors.
3. Maintenance free: There are no movable parts during the measurement process, and there is no mechanical component damage issue, so no maintenance is required.
4. Anti interference: contact measurement, strong resistance, can overcome the influence of steam, foam and agitation on measurement.
5. Accurate and reliable: Diversified measurement quantities make measurements more accurate, measurement is not affected by environmental changes, high stability, and long service life.

Technical Indicators:
1. Power supply: 220VAC ± 50VAC 50/60HZ (standard);
110VAC ± 25VAC 50/60HZ (standard); 24VAC ± 5VAC (optional);
2. Output: DPDT relay (double pole double throw);
3. Output capacity: 220VAC 5A;
4. Environmental temperature: -40 ℃ to 70 ℃;
5. Medium temperature: -100 ℃ to 800 ℃;
6. Resolution:<0.5PF;
7. Repeatability:<1mm (conductive medium); <10mm (insulation medium);
8. Response time:<0.5s;
9. Delay: 1-50s;
10. High and low level alarm: on-site can be set as HLFS (high level alarm) or LLFS (low level alarm) spark protection (for sensors): built-in spark protection circuit;
11. Electrical interface: M20 * 1.5;
12. Cable: The standard connection cable between the split electronic unit and the sensor is 5m and 50m long;
13. Process connection: NPT thread installation (standard); Flange installation (optional);
14. Shell protection: IP66;
15. Explosion proof: Exd [ia] iallct4.

Selection and installation:
1) When measuring non-conductive media, it can be installed horizontally or vertically. If vertical installation is required, the probe length should be at least 6 inches longer than the control position.

2) When measuring conductive liquids, mud or interface detection, it can be installed horizontally and vertically. The contact position between the probe and the material is the alarm position.

3) When measuring powder and granular materials, they can be installed horizontally or vertically, but when the probe passes through the container, the protective electrode should be 2 inches longer than the thickness of the accumulated material on the container wall.

If required by the user, we can provide corrosion-resistant probes made of Teflon or Kyanr material (connected with coated flanges).


Installation method.
1. Measure the liquid level of bucket shaped tanks using rod or cable probes:

Note: The probe rod or cable should avoid the opening and feeding port, and the probe rod or cable should be parallel to the warehouse wall. The distance between the warehouse wall should be greater than 200mm.
2. Measure the liquid level of a horizontal tank using a coaxial probe:

Note: Non barrel shaped tanks and non-metallic wall tanks can be measured using coaxial probes.
3. Measure the liquid level of a spherical tank using a connector:

Note: Spherical tanks and other irregularly shaped tanks can be measured using connectors.
4. Use heavy-duty cable to probe the material level of powder or fine particle silos:

Note: The probe should avoid the feeding port. When the warehouse wall is made of concrete, the grounding terminal of the sensor housing should be reliably connected to the concrete reinforcement with a wire.

The protective sleeve of Taiyuan Lime Powder Level Gauge, with a length of 150mmo, is made stronger, more practical, and more reliable by any other material with a constant value rather than adhesive accumulation. Due to the influence of current not being able to move at the same potential, it is measured by the circuit. The MKSD500 RF Admittance Level Gauge uses the American Princo anti adhesion circuit design to detect the real level while making the electronic circuit parameters more reliable. The study also uses insulators with a diameter of up to 10mm and surrounding air as dielectric materials to produce L863WC steel cables and L864C ceramics. The high temperature of L863WC steel cables and L864C ceramics is affected by the correct setting of dielectric constant sensitivity, which will affect the correct change of sensor output. We mainly adopt advanced design and production technology and establish sensitivity settings (circuit). Comparison with reference standards

Basic Parameters

detailed explanation