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便携式超声波流量计UA

超声波流量计 – Höntzsch

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超声波流量计UA

超声波流量计UA - EXACTSONIC II – 适用于液体测量的便携式超声波流量计

此款流量计采用了超声波时差法。根据超声波测量原理，一对超声波换能器交替顺流和逆流收发超声波。超声波通过顺流介质的传播时间比通过逆流时的传播时间短。根据传播路径测算出的时间差Δt，可换算得到液体的平均流速。再根据流速和管道横截面积可计算出体积流量。

超声波流量测量原理的多种优点

超声波流量计有很多优点，例如几分钟即可获得精准流量值、操作简便、无需中断过程和阻断被测管道。只需要将流量计简单安装在管道上，这样不会造成压损，并且可以节省安装时间和成本。

外夹式手持超声波流量计优点:

  • 可安装在运行中的系统中，无需中断工艺过程
  • 安装简便，节省成本
  • 重量轻和符合人体工程学设计，因此便于携带
  • 非常适用于维护和调试
  • 检测定点式流量计是否正确测量

与其他流量计相比，超声波流量计具有以下优点:

  • 测量与被测介质特性无关，例如导电性、密度、温度和黏度
  • 无可动部件
  • 被测管道内无需安装任何测量元件
  • 测量点横截面无阻挡物
  • 无压损
  • 几乎无需维护

外夹式超声波流量计测量的优势:

  • 与被测介质无接触
  • 与被测介质(液体)特性无关，例如压力、温度、导电性、黏度
  • 不受工况限制，无需介入工艺流程
  • 测量过程中无压损、无泄漏风险、无额外清洁支出
  • 如管道中有阻塞，仍然可以正确测量
  • 可测量极微小的流速(最小可测流速 0.2 m/s ) >> 高灵敏度

超声波流量计使用时支出费用低:

  • 易于移动安装至其他测量点
  • 极低的安装和维护成本
  • 探头几乎无需维护和清洗

因此外夹式手持超声波流量计性价比非常高。

超声波流量计的应用行业和测量介质:

适用于管道和暖通系统中的液体流量测量，也可检测泵、工业系统、锅炉、泄漏、过滤器、灭火和液压装置等。

精准的无接液超声波流量计对许多行业都是必不可少的，例如水利工程、建筑、能源管理、化工、制药、食品和石化行业。

精准的无接液超声波流量计对许多行业都是必不可少的，例如水利工程、建筑、能源管理、化工、制药、食品和石化行业。

超声波流量计的应用工况:

化工行业
有腐蚀性的、有毒性的、高粘度和非导电性介质

石化行业
中间产品和最终产品的流量测量，例如焦油、沥青等

海上石油平台
液化烃流量测量，如乙烷、乙烯、丙烯、石油气等。

发电厂
冷却塔中循环水流量测量

制药、半导体
纯净液体流量测量

饮料行业
灌装或储罐系统中卫生型流量测量

供水/废水排放
大型管道和地下管道中水流量测量

机械和系统设备
例如液压系统和泵控制系统中的泄漏流量测量

航天航空
液压、供电和冷却系统检测

以上只举例了某些行业中的经典应用。

 

以下介质也适用于超声波测量:
脱盐水、饮用水、河水、水乙二醇混合物、液压油、柴油、燃料油等。

 

超声波流量计技术参数

  • 管道中液体流量测量，测量范围0.2 … 20 m/s
  • +/-正负流向辨识
  • 测量不确定性: 外管径> 75 mm: ± 2 % 测量值
  • 用户友好型菜单
  • 背光显示屏, 分辨率 64 x 240 像素
  • 16个操作按键，用于参数设置
  • 充电电池和主电源
  • 充电电池最长可达20小时
  • 主电源 110 … 240 VAC +/-10 %
  • 10 种操作语言:德语、英语、法语、意大利语、荷兰语、 瑞典语、挪威语、葡萄牙语、俄语、西班牙语
  • 包含两组超声波换能器 'A' 和 'B':'A'组适用于管外径范围13 … 115 mm ，'B'组适用于管外径50 … 2000 mm
  • 超声波换能器耐温范围: -20 … +135 °C
  • 输出信号: 0/4-20 mA, RS232/USB, 隔离式脉冲输出5 V, 最高频率 1 个脉冲/s
  • 数据记录仪: 98000 组数据, 20个可索引的记录块，以文本形式或图形表示，可通过Windows PC上的RS232 / USB接口下载数据
  • 带坚固型IP67防护等级仪器箱

ExactSonic III - Portable Ultrasonic Flow Measurement

The ExactSonic III operates using the ultrasonic transit-time difference method, a precise and proven measurement principle. The sensors alternately transmit ultrasonic pulses through the medium in the direction of flow and against the flow. Each sensor alternately acts as both a transmitter and a receiver. 

Since sound signals travel faster in the direction of flow than against the flow, a measurable transit-time difference (Δt) results. This difference is precisely recorded, allowing reliable determination of the average flow velocity. 

Based on the determined velocity and the calculated pipe cross-section the device then calculates the volumetric flow rate - that is, the actual flow rate of the liquid. 

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Measurement principle of Ultrasonic Flow Measurement

The principle of measurement behind ultrasonic flow measurement offers numerous advantages and has established itself as a reliable and efficient method. Users benefit from accurate measurement results within minutes, easy operation and flow measurement without interrupting the process.

Since the sensors are mounted on the outside of the pipe, there is no instrusion into the cross-sectionm which means there is no pressure loss. At the same time, the easy installation saves time and money.

Advantages of Ultrasonic Flow Measurement

Advantages of non-contact measurement with ultrasonic flow meters:

  • Installation during ongoing plant operation, without process downtime
  • Simple and cost-effective installation
  • High mobility thanks to low weight and ergonomic design
  • Ideal for use in service and comissioning
  • Quick inspection of stationary measuring systems

Advantages compared to other methods

Economic advantages 

  • Highly independent from medium properties such as conductivity, density, temperature or viscosity
  • No moving parts in the device
  • No internal components within the pipeline → no cross-section loss and no pressure drop
  • Virtually maintenance-free operation
  • No risk of clogging or leakage
  • Precise measurement even of lowest flow velocities starting at 0.2 m/s →  high turndown ratio
  • Easy retrofitting into existing systems
  • Low installation and operating costs
  • No cleaning or maintenance required for the sensors
  • Excellent cost-benefit ratio

Use and Application Examples of Ultrasonic Flow Rate Meters

Ultrasonic flow meters offer a wide range of applications for measuring the flow of liquids. Typical applications include:

  • Flow measurements in heating, air conditioning and ventilation systems
  • Monitoring and inspection of pumps and technical systems
  • Tests on boilers
  • Leak detection in pipelines
  • Filter and permeability measurements
  • Monitoring of fire extinguishing and hydraulic systems

The key advantage: Since there is no direct contact between the measuring device and the medium, ultrasonic flow measurement is particularly well-suited for industries with high requirements for safety, hygiene and process stability.


Send your enquiry now!

 

Applications for Ultrasonic Flow Meters

Chemical Industry

Measurement of corrosive, toxic, high-viscosity or non-conductive liquids

Petrochemistry

Flow measurement of intermediate and final products such as tar or bitumen

Offshore-Industry

Measurement of liquid hydrocarbons under demanding conditions

Power plants

Monitoring the flow of cooling water, boiler feed water or condensate

Pharma- and semiconductor industry

Measurement of high-purity fluid without the risk of contamination

Beverage industry

Hygienic flow control in filling and tank systems

Water and wastewater management

Reliable measurement even in large pipes or underground lines

Machinery and plant engineering

A wide range of applications, e.g. leak detection in hydraulic systems or pump monitoring

Aviation industry

Inspection of hydraulic-, supply- and cooling systems

 

Suitable measuring media

In addition to conventional media such as drinking water, river water and fully demineralized water, numerous specialty media can also be measured without any problems, including:

  • Water-glycol mixtures
  • Hydraulic oil
  • Diesel, heating oil and other petroleum products

Technical Specifications of the Ultrasonic Flow Meter

  • Flow velocity of liquids in pipelines from 0.2 to 20 m/s
  • +/- Flow direction detection
  • Measurement uncertainty: pipe OD > 75 mm: ± 2 % of the measured value
  • Menu-driven operation
  • Backlit display, resolution 64 x 240 pixels
  • 16-button control panel for parameter settings
  • Battery and mains power supply
  • Battery life up to 20 hours
  • Supply voltage 110 to 240 VAC +/-10 %
  • User languages: German, English, French, Russian, Spanish
  • Includes two pairs of measuring transducers 'A' & 'B': pair 'A' for pipe-OD 13 to 115 mm pair 'B' for pipe-OD 50 to 2000 mm
  • Temperature range of measuring transducer pairs: -20 to +135 °C
  • Outputs 0/4-20 mA, USB, opto-isolated 5V pulse output, max. 1 pulse/s
  • Data logger: 8 GB, 20 indexable recording blocks, display in text or graphical form, copy to USB flash drive
  • Supplied with a robust IP67 carrying case
ExactSonic III - U456 Operating instruction ExactSonic III - U455
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