Fixed Ultrasonic Flow meter

1.Fixed Ultrasonic Flow Meter Product Introduction

Fixed Ultrasonic Flow meter determines the flow rate by sending the ultrasonic signal and calculating the flow rate of the fluid by the time difference of receiving the return signal.Fixed Ultrasonic Flow meter integrates the company's more than ten years of professional production and manufacturing of ultrasonic flow meter technology and experience, using TI's MFP430FG4618 low-power microcontroller, is a high-performance, low-price, good reliability, powerful new ultrasonic flow meter product.

The product has been greatly improved compared with the original ultrasonic flowmeter in terms of measurement accuracy, measurement stability, communication protocol, ease of use, etc. At the same time, it has achieved the non-adjustment of component parameters during the production process, the production process is simpler and more applicable, and the product consistency is better, thus ensuring that each product leaving the factory achieves the best performance.

2. Working Principle of Fixed Ultrasonic Flow Meter

When an ultrasonic beam propagates in a liquid, the flow of the liquid will cause a slight change in the propagation time. The change in propagation time is proportional to the flow rate of the liquid. At zero flow, the time required for the two sensors to transmit and receive sound waves is exactly the same (the only technology that can actually measure zero flow). When the liquid flows, the sound wave transmission time in the upstream direction is greater than the sound wave transmission time in the downstream direction.

3. Fixed Ultrasonic Flow Meter Product Features

In addition to the general functions of similar products, ultrasonic flow meters also have the following features:

1. The number of sampling times per cycle has been increased to 128 times, and the measurement results are more stable. It can meet the flow measurement needs of most clean water, sewage and various chemical liquids, and greatly reduce the interference of poor detection environment on the measurement results.

2. The use of electrically isolated DC power supply greatly improves the reliability and anti-interference of the host. If there is no power supply on site, users can choose a 15W solar panel with a 24V/30AH lead-acid battery pack, and can achieve continuous power supply for a week on cloudy days.

3. The measuring mainboard is equipped with a standard isolated RF-485 interface, which can support both MODBUS and M-BUS standard protocols, and is fully compatible with the communication protocol of the original ultrasonic flow meter and various flow meter water meter protocols produced by the company.

4. The measurement mainboard is equipped with a serial expansion bus interface, and users can select various function expansion modules for function expansion. The expandable functions include 4-20mA current loop output, frequency signal output, large-capacity data recording, thermal printer, etc.

5. The mainboard has two three-wire PT100 platinum resistance input circuits. When connected to a platinum resistance, it becomes a complete ultrasonic calorimeter. At the same time, the temperature difference sensitivity function is added to prevent the ineffective accumulation of heat during long-term low flow rate or low temperature difference.

6. The mainboard has three analog input circuits. It can input physical quantities such as pressure and liquid level and can be used as a simple RTU.

7. A fault timer is added to the software operation window (located in menu M+9). When the instrument cannot measure normally, the time value will increase.

8. There are up to 8 different language interfaces for customers to choose from.

4. Fixed Ultrasonic Flow Meter Technical Parameters