tuning fork switch

TKWL-2100 tuning fork level switchIt is a new type of level control switch that mainly relies on a tuning fork to measure the level height through vibration principle. The working principle of the tuning fork level controller is to vibrate the tuning fork at a certain resonance frequency through a pair of piezoelectric crystals installed on the tuning fork base. When the tuning fork comes into contact with the measured medium, its frequency and amplitude will change, and these changes will be detected, processed, and converted into a switch signal by an intelligent circuit.

Details

TKWL-2100 tuning fork level switchDue to its adjustable amplitude, it is convenient to measure materials of different states and densities, and is suitable for fixed-point detection, alarm or control of solid material levels in various silos and liquid levels in various containers.

Solid materials: fly ash, cement, stone powder, plastic pellets, salt, sugar, etc.

Liquid media: water, acid, alkali, mud, fuel, oil, milk, alcohol, beverages, etc

Technical Specifications

Output form: Two sets of normally open and normally closed contacts; 0/10mA working pressure: ≤ 1.0Mpa Material temperature: ≤ 300 ℃

Material density: ≥ 0.2g/cm3 Material particle size: ≤ 10mm Explosion proof grade: Exd Ⅱ BT4 Protection grade: IP65 Material: various grades of stainless steel, connection method: threaded 11/2 '' flange DN50 Installation method: side or top installation

feature

·Measurement media: dry particles, powdered materials, various liquids, slurries, etc

Introduction to the principle of tuning fork level switch

TKWL-2100 tuning fork level switchIt is a new type of level control switch that mainly relies on a tuning fork to measure the level height through vibration principle. The working principle of the tuning fork level controller is to vibrate the tuning fork at a certain resonance frequency through a pair of piezoelectric crystals installed on the tuning fork base. When the tuning fork comes into contact with the measured medium, its frequency and amplitude will change, and these changes will be detected, processed, and converted into a switch signal by an intelligent circuit.

3 Characteristics of tuning fork level switch

The tuning fork level switch has the characteristics of long service life, stable performance, safety and reliability, strong adaptability, no need for calibration, and maintenance free. It is mainly widely used in the process control of level in industries such as metallurgy, building materials, chemical industry, light industry, and grain.

It is not affected by foam, vortex and gas, and is suitable for fixed point alarm or control of solid material level in various bins and liquid level in various containers.

For solid materials, it mainly measures medium density solid powders or particles that can flow freely. For example, fly ash, cement, sand, stone powder, plastic pellets, salt, sugar, etc.

For liquid materials, the main measurement includes liquids with explosive and non explosive hazards, corrosive liquids (acid, alkali solutions, etc.), high viscosity liquids such as water, acid, alkali, mud, pulp, dyes, oils, milk, alcohol, beverages, etc. The application of tuning fork level switches is relatively wide, mainly targeting powders and small particles with a wide density range, such as detecting blockages in the inlet and outlet pipes of dust collectors, measuring the material level of dust collectors' ash hoppers, measuring limits for plastics, rubber powders, flour, various grain crops, food, chemical products, and so on.

For liquids with various properties, such as slurry, viscous, easy to form foam, corrosive and other media limit detection.

4 Technical specifications of tuning fork level switch

Supply voltage: 220V/24VDC

Working temperature: Fork body -30~150 ℃

Instrument: -20~70 ℃

Work pressure: less than 2Mpa

Medium density: low 0.6g/cm3

Output mode: A set of relay outputs (AC 220V/3A, DC 30V/3A)

Output delay: adjustable from 1 to 20 seconds

Sensitivity: Adjustable from 1 to 10 levels

Power consumption: 1W

Installation interface: Cone tube G1 "

Electrical interface: M20 × 1.5

Application of 5 tuning fork level switches

1. Slurry, viscous, easy to form foam or corrosive liquid.

1. Medium density solid powders or particles that can flow freely. For example, fly ash, cement, sand, stone powder, plastic pellets, salt, sugar, etc.

2. Liquids with explosive and non explosive hazards, corrosive liquids (acids, alkalis), and high viscosity liquids. For example, water, acid, alkali, mud, pulp, dyes, oils, milk, alcohol, beverages, etc.

3. Toxic substances.

6. Product performance of tuning fork level switch

Intrinsic safety signal , can be used in explosive hazardous areas with high safety: PFM technology is connected through cables and sensors, which can directly monitor the status of the sensors and monitor the corrosion of the Liquiphant tuning fork. The integrated housing is easy to install on the rail with plug-in terminal blocks, and the wiring is simple. Liquiphant M and S (high temperature type) follow WHG standards for repeated testing

7 Characteristics of tuning fork level switch products

Strong adaptability: Different electrical parameters and densities of the tested liquid do not affect the measurement. Scaling, agitation, turbulence, bubbles, vibration, moderate viscosity, high temperature, high pressure and other harsh conditions have no effect on the detection. Maintenance free: As the detection process of the tuning fork limit switch is completed by electronic circuits without moving parts, it does not require maintenance once installed and put into operation. No need for calibration: As the detection of tuning fork limit switches is not affected by the electrical parameters and density of the measured medium, no on-site calibration is required for any type of liquid being measured. 3、 Typical applications of tuning fork level switches include tap water, mineral water, pulp, glue, and dyes. Mud, alkali solution, acid solution. Beer, beverages, and liquids that can produce gases. Solid powder with good fluidity.

8 Technical parameters of tuning fork level switch

Power supply voltage: DC 24V or AC 220V Operating temperature: Fork body -40-150 ℃ Instrument -20-70 ℃ Working pressure: less than 2Mpa Medium density: low 0.7g/cm3 Output mode: Relay output (AC220V/5A, DC 28V/10A) Output delay: 1-60 seconds Adjustable power consumption: 0.5W Installation connector: R1 cone tube thread 5, tuning fork level switch Product debugging After installing the sensor on the compartment, correctly set the 'upper/lower limit selection' short-circuit device, and power on it for use. When the upper/lower limit is selected, the short-circuit device is inserted to the right for upper limit detection. At this time, when the fork is submerged in material, the output relay is engaged, and when the material leaves the fork, the relay is released. (Set as upper limit detection at the factory) When the short circuit is inserted to the left, it is the lower limit detection. When the material leaves the fork, the output relay is engaged, and when the fork is immersed in material, the relay is released. Output action delay 'is used to eliminate output relay jitter. (Factory setting 3 seconds) 'Sensitivity adjustment' is set to standard at the factory. If adjustment is required, please follow the manufacturer's guidance.

6、 Precautions for tuning fork level switch

*Viscous liquids and granular materials are not suitable for this sensor.

During installation and construction, be careful not to subject the fork to strong impact to avoid damaging the piezoelectric crystal.

When measuring powders and liquids with high viscosity, the two parallel fork plates of the fork should be perpendicular to the ground (at this time, the direction mark of the fork should be raised or lowered) to ensure that the material can easily flow out between the fork plates.

The power and signal lines of the sensor should avoid being laid parallel, twisted together, or routed in the same conduit as the power lines of other high-power devices.

When driving inductive loads (such as AC contactors), surge arresters should be connected in parallel at both ends of the load.

When there are high-power equipment and variable frequency equipment on site, DC 24V power supply should be selected as much as possible.