Instrumentation and Meters
YG Tuning Fork Level Switch
YG Series Tuning Fork Level Switch operates by vibrating the tuning fork using piezoelectric crystals and the fork’s natural frequency. This frequency change is continuously monitored. When used for low?level alarm (or low? level control), the medium in the vessel drains down past the fork; when the level drops below a specific point on the fork, the natural frequency changes. This change is detected by the electronics, which switches the output state. When used for high?level alarm (or high?level control), the rising medium contacts the fork and again switches the output. The fork’s natural frequency (approx. 1300?Hz) is chosen to avoid interference from plant vibration that might cause false switching. The fork is short, minimising the insertion length into the vessel or pipe. Thanks to the short?fork design, the unit is suitable for virtually all liquid applications as well as for free?flowing solids. Extensive research has optimised the fork design for maximum operating efficiency, making it suitable for almost all liquids, including coating liquids (eliminating bridging or build?up), aerated liquids, slurries, and free? flowing non?sticking powders. The tuning fork level switch is also referred to as an “electric float”. It can be used wherever float?type level switches are applied, and also in cases where float switches cannot be used due to construction, turbulence, agitation, bubbles, vibration, or other adverse conditions. Since the tuning fork level switch has no moving parts, it requires no maintenance or adjustment, making it an upgraded replacement for float switches. The tuning fork level switch is widely used in petrochemical, light industry, food, water treatment, and other industries for upper/lower limit alarm and automatic control of level.
Product Series
Industrial Standard Outline Drawing
Industrial Standard Outline Drawing
Installation Drawing of Industrial Standard Tuning Fork Switch for Upper/Lower Limit Alarm
YG Tuning Fork Level Switch
Product Features
Strong adaptability: Precision electronic components and dual?function capability make it suitable for almost all fluids. Different electrical parameters and densities of the measured liquid do not affect measurement. Adverse conditions such as scaling, agitation, turbulence, bubbles, vibration, moderate viscosity, high temperature, and high pressure also do not affect detection.
Maintenance-free: Since the detection process is accomplished by electronic circuits with no moving parts, once installed and put into operation, no maintenance is required.
Typical Applications
Tap water, mineral water Pulp, glue, dyes Wastewater, mud, acid/alkali solutions Liquids that generate gas Beer, beer fermenting agents, beverages, diesel oil Hazardous areas Free-flowing solid powders
Typical Applications
The tuning fork level switch is usually installed side-mounted (on the side wall of the vessel) to detect upper/lower limit levels. If side opening is inconvenient (on the top of the vessel) can be used; the installation position should be chosen to avoid material impact during feeding. It can also be installed on pipelines to prevent pumps from running empty (see figures).
Precautions
The compact tuning fork level switch is suitable for detecting most liquids. It is most appropriate when the liquid has general viscosity and good flowability. Free-flowing powders and solid particles smaller than 3 mm in diameter can also use the compact type. However, the product is not suitable when: Material viscosity is too high Particle diameter exceeds 5 mm Vessel temperature exceeds 150°C Pressure exceeds 2 MPa There is strong vibration in the vessel The sensor’s power and signal cables should not be laid parallel to, twisted with, or run in the same conduit as power cables of other high-power equipment. When switching inductive loads (e.g., AC contactors), a “surge suppressor”should be connected in parallel across the load. In sites with high-power equipment or frequency converters, DC24Vpowersuppl y is recommended.
Selection Examples
Example 1: Model: YG-D04ZC11S (R1″) – 200 Description: 24VDC supply, no delay, material SUS304, non-explosion-proof, compact standard process connection thread R1″, fork insertion depth 200mm.
Example 2: Model: YG-A16EC22F (DN50PN1.0MPaRF) Description: 220VAC supply, 1-30 s delay, material SUS316, explosion-proof rating ExdIICT6, industrial normal-temperature type (≤90 °C), process connection flange DN50 PN1.0 MPaRF, standard fork insertion length.
Selection Chart
The compact tuning fork switch is usually side-mounted on the vessel wall to detect upper/lower limit levels. If side opening is not feasible, top-mounted installation is used. The installation position should avoid material impact during filling.
Technical Specifications
Technical Specifications
Company Address
A2001-228, Floor 20, R&D Building Phase 4,
International Science and Technology Park,
No. 1355 Jinji Lake Avenue,
Suzhou Industrial Park,
Suzhou, Jiangsu, China
Email
clara@szyc-materials.com
simon@szyc-materials.com
Whatsapp
+86 13812870147