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technical article
Characteristics and structural principle of float ball level gauge
2012-1-4 10:23:23

是由液位传感器和智能HART板(电流转换器)两部分组成,浮球与液位同步变化,控制干簧管吸合断开,从而使传感器内电阻成线性变化,再由转换器将电阻的 The float ball level meter is composed of a liquid level sensor and a smart HART board (current converter). The float ball and the liquid level change synchronously, and the reed switch is controlled to open and close, so that the internal resistance of the sensor changes linearly. The converter will

Change into 4 ~ 20mA standard current signal and superimpose HART digital signal output. Remote transmission control room can realize automatic detection, control and recording of liquid level. The meter is suitable for sewage in petroleum, chemical, power, light industry and pharmaceutical industries.

Treatment and measurement of the medium level in various atmospheric and pressure-containing vessels, especially for underground tanks and tanks.

除了一般液位变送器的固有特点外,还具有如下特点: In addition to the inherent characteristics of general level transmitters, the float level meter also has the following characteristics:


1. Intelligent electronic components are composed of a motherboard and an LCD screen;


2. You can adjust the range and zero point by pressing the button on the spot;


3. It conforms to the HART protocol, and can use HART communicator or microcomputer to communicate with this smart instrument on both sides without interrupting the output signal. It is suitable for explosion-proof or inconvenient disassembly and assembly of instrumentation.

Calibration or diagnostic information is accessed or modified through HART protocol;


4. Two-way communication with the host in the distributed control system using the HART protocol;


5. With EEPROM, no data is lost due to power failure.


The main technical parameters:


Measuring range: 0 ~ 3500mm


Power supply voltage: 12 ~ 36V DC


Output signal: 2-wire 4 ~ 20mA.DC superimposed digital signal, user can choose square or linear output;


Load resistance: 250Ω


Measurement accuracy: ± 10mm


Ambient temperature: -40 ~ 80 ℃

Working temperature: -20 ~ 120 ℃


Nominal pressure: ≤1.6MPa


Flange standard: A: JB / T82.1-94 (flat flange)

DN100 PN1.6 ball φ90

B: JB / T82.1-94 (flat flange)


DN80 PN0.6 ball φ76


Medium density: ≥0.65g / cm & shy; 3


Medium viscosity: ≤0.015PaS


Wetted material: stainless steel


Protection level: IP65


Structural principle:


由液位传感器和智能HART板(电流转换器)两部分组成,浮球与液位同步变化,控制干簧管吸合断开,从而使传感器内电阻成线性变化,再由转换器将电阻 The float ball level gauge consists of a liquid level sensor and a smart HART board (current converter). The float ball and the liquid level change synchronously, and the reed switch is controlled to open and close, so that the resistance in the sensor changes linearly. Converter will resistor

The change is converted into 4 ~ 20mA standard current signal and superimposed with HART digital signal output.