Metal Tube Float FlowmeterYK-LZZ

Suitable Medium

Chemical liquid/gas

Unsuitable Media


LZZ metal tube float flow meter is a variable area flow meter based on float position measurement. It adopts all-metal structure and Modular concept design. Because of its small size, small pressure loss, large range ratio (10:1), convenient installation and maintenance, etc., it is widely used in various industries in complex and harsh environments, for small flow, Flow measurement and process control for low flow rate and various harsh media conditions. The series of metal tube float flowmeters has a variety of measurement modes for users to choose from according to different user needs and different occasions; according to the output form, there are local indication type, remote transmission type, and control alarm type; according to explosion-proof requirements Classification can be divided into three types: ordinary type, intrinsically safe type, and isolated explosion-proof type.



The metal tube float flowmeter consists of two parts:

  L signal transmitter ---- indicator;

  L sensor --- measuring tube and float;


There are four types of liquid contact materials for the sensor: stainless steel, Hastelloy, titanium, and stainless steel lined with PTFE; users can choose different liquid contact materials according to different process pressures and the corrosive requirements of the medium to meet the pressure resistance of the process and The need for medium anticorrosion. According to different measurement requirements, users can choose different indicator combinations to achieve different measurement requirements when selecting models. For the specific indicator form and its corresponding function, please refer to the indicator staves.


The flow measurement is performed by the transmitter in the indicator by coupling the magnetic steel to sense the change of the float position to complete the flow indication and the remote transmission of the signal. When the measured medium flows through the measuring tube from bottom to top, the float is balanced by gravity, buoyancy, and the vertical upward pushing force of the fluid flow rate. The ring area and fluid flow rate change, and the position of the float corresponds to the size of the measured medium flow.


1. Single-axis, non-contact new magnetic coupling structure, signal transmission is more stable;

2. Modular combination design, convenient maintenance, maintenance-free in normal use;

3. Two-line, large-screen LCD display instantaneous and accumulated flow, with backlight;

4. The intelligent type has the functions of power failure protection, data backup and recovery;

5. All metal structure, earthquake resistance, pressure resistance, temperature resistance and corrosion resistance;

6. Short stroke, total height 250mm, more convenient design and installation


Measuring range

Liquid (20℃)

2.5~100000 l/h

Gas (0.1013MPa 20°C)

0.07~3000 m3/h

Range ratio


Accuracy class


Work pressure

DN10~DN50  PN4.0MPa (Special type25MPa)

DN80~DN100 PN1.6MPa (Special type16MPa)

Jacket pressure rating: 1.6MPa

Medium temperature

Standard type -40℃~+120℃

High temperature type 300℃

Lining F46 fluoroplastic: -40℃~+80℃, inner PTFE: -10℃~+120℃

Ambient temperature

 Pointer type: -40℃~+65℃

Intelligent type: -25℃~+65℃

Medium viscosity

DN10: ≤5mPa.s(H15.1~H15.3)


DN25: ≤250mPa.s


powered by

Standard type: 24VDC, ripple ≤5%

Battery type: one 3.6V lithium battery, can be used for one year

Connection method

Standard type: DIN2501 flange

Special type: user-provided flange standard

Thread connection type: DIN11851 or user specified

Electrical Interface


Protection level


Explosion-proof mark

Intrinsically safe type: ExiaIICT3~6

Flameproof type: ExdIIBT4

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