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Tuning Fork Level Switch
● LNG liquefied natural gas transportation pipelines (density 0.56g/cm³)
● Raw material storage tanks, tankers, and reaction kettles in the production of chemical fragrances (strongly corrosive, high-temperature liquids)
● Storage tanks for oil, crude oil, gasoline, and lubricating oil
● Configurable via HART handheld operator
● Pipeline liquid level control in pump protection systems
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Product Description
Product Overview Product overview
This series of tuning fork level switches is a highly reliable control switch specifically designed for liquid level measurement. The length of the tuning fork is only 40mm, making it suitable not only for liquid level measurement in containers, tanks, and reservoirs but also for measuring liquid levels in narrow spaces such as pipes. At the same time, based on the design principle of detecting the change in vibration frequency when the fork body is immersed in the medium, the fork body is precisely tuned, allowing the product to measure medium densities as low as 0.5g/cm³. It is suitable for measuring the levels of hydrochloric acid, sulfuric acid, nitric acid, alkaline solutions, syrups, medicinal liquids, industrial wastewater, and is particularly suitable for complex measurement scenarios involving high-pressure liquefied gases (such as LNG) as well as foamy, bubbly, viscous liquids and vibration interference.
Product Principle THE PRODUCT PRINCIPLE
This series of tuning fork level switches uses piezoelectric devices to achieve vibration drive and detection of the fork body. When the fork body comes into contact with the liquid being measured, the resonant frequency of the fork body significantly decreases, and the change in vibration frequency is directly reflected in the output signal of the piezoelectric detector. The detection circuit determines the change in frequency and outputs a switch signal.
Performance Indicators TECHNICAL PARAMETERS
| Applicable Liquids |
Density |
≥0.5g/cm³ |
| Viscosity |
0.1～10000mPa.s① |
|
| Flow Rate |
Maximum 6m/s |
|
| Probe Parameters |
Surface Roughness |
Ra < 0.5 μm |
| Vibration Frequency |
Approaching 1200Hz |
|
| Fork Body Length |
40mm |
|
| Accuracy |
Measurement Deviation |
±1mm |
| Hysteresis |
2mm |
|
| Repeatability |
0.1mm |
|
| Switch Delay |
Contact Material |
0.5s |
| No Material |
1s |
|
| Power Supply |
Relay Output Type |
20～253V AC/20～72V DC |
| Two-Wire Type |
10～36V DC |
|
| NAMUR |
8.2V DC |
|
| Transistor (NPN/PNP) |
6~48V DC |
|
| Maximum Power Consumption |
8VA (AC); 1.5W (DC) |
|
| Signal Output |
Relay |
Double Pole Double Throw 5A/253V AC/24V DC |
| Two-Wire |
8mA/16mA, Alarm <2.3mA |
|
| NAMUR |
≤1mA or ≥2.1mA, Fault ≤1mA |
|
| Transistor |
NPN/PNP |
|
| Operating Environment |
Process Pressure |
-1～64bar |
| Process Temperature |
Normal Temperature -50～150℃ |
|
| High Temperature -50～250℃ |
||
| Ambient Temperature |
-40～70℃ |
|
| Storage and Transportation Temperature |
-40～80℃ |
|
| Overpressure Protection |
Relay Output Type |
Category III, Level I |
| Two-Wire Type |
Category III, Level II |
|
| Safety Certification |
SIL Certification |
SIL2 (HFT=0)/SIL3 (HFT=1) |
| Explosion Protection Level |
Explosion-proof: Ex d IIC T6~T1 Gb |
|
| Intrinsic Safety: Ex ia IIC T6~T1 Ga |
||
| CE |
LVD Certificate and EMC Certificate |
|
| Protection Level |
IP66/IP67 |
|
| Material |
Shell |
Aluminum Alloy |
| Ground Terminal |
316L |
|
| Threaded Process Connection |
316L |
|
| Flanged Process Connection |
316L, 316L Coated Enamel, 316L Coated ECTFE, 316L Coated PFA |
|
| Fork Body |
316L, 316L Coated Enamel, 316L Coated ECTFE, 316L Coated PFA |
|
| Process Seal |
Klinger C-4400 Gasket |
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Tianjin Ling Yu Technology Co., Ltd.
Operator:86-22-58554679
Fax: 022-58285528
After-sales technical support:86-18920413023
Complaint Hotline:86-15822286986
Factory Address: No.5 Yingbin Road, Xiqing District, Tianjin
E-mail:sales@lingyukeji.com
Purchasing Department E-mail:lykj_tj@163.com
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