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Compact Liquid Level Switch

Ring-21 Compact Liquid Level Switch

 Compact and portable, with overall length 160.5mm, maximum diameter 31.5mm and the fork body only 38mm long.

 Particularly suitable for pipelines and other applications within constricted space.

 Strong disturbance resistant ability, not influenced by foam, bubbles, viscosity, vibration or other liquid characteristics.

 Highly reliable, safe and easy to operate, with great flexibility.

 Economical and practical, high cost-effective ratio.

  • Ring-21 is an economical compact tuning fork liquid level switch. It is designed with a lightweight compact structure with the fork body 38 mm long, the total length 160.5 mm and the maximum diameter 31.5mm. Ring-21 can be applied to the level measurement for vessels, containers and storage tanks. It can tolerate foam, air bubbles, higher viscosity and vibration disturbance. Particularly it is a better choice for small containers or tanks within constricted space. It is also based on the principle that the vibrating frequency changes when the fork body is immersed into the measured medium. The measurable density can be as low as 0.7g/cm³.


  • Same as Ring-11, Ring-21 Compact Liquid Level Switch is designed based on the fork resonant principle. When the fork body which vibrates in harmonic resonance immerses into the measured liquid, the vibrating frequency of tuning fork will greatly decrease. So does the output of the piezoelectric detection device. An integrated circuit is designed to analyze the signal from the piezoelectric device and output a switching signal.


  •  Compact and portable, with overall length 160.5mm, maximum diameter 31.5mm and the fork body only 38mm long.

     Particularly suitable for pipelines and other applications within constricted space.

     Economical and practical, high cost-effective ratio.

     Strong disturbance resistant ability, not influenced by foam, bubbles, viscosity, vibration and other liquid characteristics.

     Highly reliable because of detecting the changed of vibrating frequency of the fork.

     Safe and easy to operate, with great flexibility.

  • Applicable liquids

    Density

    >0.7g/cm³

    Viscosity

    1~10000mPa.s= 1 \* GB3

    Flow Velocity

    Max 6m/s

    Probe data

    Vibrating frequency

    ~1200Hz

    Fork length

    38mm

    Accuracy

    Measurement error

    ±1mm

    Delay

    3.0±0.5mm

    Repeatability

    0.5mm

    Switching

    delay

    When immersed

    0.5s

    When laid bare

    1s

    Power supply

    Relay output

    85~253V AC

    10~35V DC

    Transistor PNP

    10~35VDC

    Power consumption

    AC: < 3.8mA; DC: < 825mW

    Working environment

    Process pressure

    -1~40bar

    Process temperature

    -50~150℃

    Ambient temperature

    -40~70℃

    Storage and transport temperature

    -40~80℃

    Overvoltage protection

    Relay output

    Category III, class I

    Transistor PNP

    Category III, class II

    Approvals

    Protection rating

    Valve connector: IP65

    M12x1: IP66/IP67

    Materials

    External Housing

    316L

    Process fitting

    316L

    Process seal

    Klingersil C-4400

    Note: ①: assume the medium density equals to.1.

  • Applications that expecting low cost, in non-explosive environment or within constricted space.


  • Ring-21 Compact Liquid Level Switch
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