Active Member
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[China]
Address: No.21, Lane 697, Guangfulin Road, Songjiang District, Shanghai, China
Contact name:Nancy Zhao
Melan Measurement & Control Instruments (Shanghai) Co.,Ltd. |
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DN10-DN50 Ultrasonic Clamp On Flow Meter
I. INTRODUCTION
ML-F8 is very unique in its structural design. It uses a circular
magnetic steel to achieve automatic connection during
installation.It takes only 2-3 minutes to complete the whole
process from installation to measurement. It also adopts the
current popular OLED display, which makes it easy to read in low
light conditions.
II. FEATURES
III. SPECIFICATION
| Model | ML-F8 |
| Velocity Range | 0.1 m/s ~ 5.0 m/s |
| Accuracy | ± 2.0% |
| Repeatability | 0.80% |
| Pipe Size | DN15,DN20,DN25,DN32,DN40,DN50 |
| Data Storage | Daily, Monthly, Yearly Totalizer |
| Analog output | 4~20mA, Maximum load: 600Ω |
| Alarm output | OCT, Upper and lower limit alarm function (for option) |
| Communication | RS485,support Modbus communication protocol |
| Power Supply | 24VDC |
| Cable Length | 1.8m |
| Keypad | Four light touch buttons |
| Screen | OLED 128*64 screen display |
| Units | Metric and imperial units are available Cubic Meters(m3), Liters(L),USA Gallons(GAL)/hour, USA Gallons(GAL)/min Default unit setting: m3/h |
| Totalizer | Six bit digit |
| Piper Material | Stainless steel pipe, carbon steel pipe, PVC |
| Case Material | Aluminum alloy |
| Environment Temp. | 0℃-50℃ |
| Medium Temp. | 0℃-50℃ |
| Environment Humidity | 0-95% relative humidity, without condensation |
| IP Grade | IP54 |
IV WORKING PRINCIPLE
Ultrasonic flow meters use sound waves at a frequency beyond the range of hearing (typically 0.5, 1, or 4 MHz). This ultrasound signal is sent into a stream of flowing liquid by using wetted (insertion) transducers that make direct contact with the liquid or external (clamp-on) transducers that send the ultrasound through the pipe wall. Clamp-on ultrasonic flow meters allow users to measure the volumetric flow rate of a fluid in a pipe without having to penetrate the pipe which decreases installation and maintenance costs.
A typical transit-time ultrasonic liquid flow meter utilizes two ultrasonic transducers that function as both ultrasonic transmitter and receiver. The ultrasonic flow meter operates by alternately transmitting and receiving a burst of ultrasound between the two transducers by measuring the transit time that it takes for sound to travel between the two transducers in both directions. The difference in the transit time (∆ time) measured is directly proportional to the velocity of the liquid in the pipe.
Ease-of-Installation: The largest benefit of any “clamp-on” transit-time flow meter is the ease-of-installation. While still requiring sections of straight pipe upstream of the measurement location, the process does not require shutting the system down to install, making maintenance and upkeep of transit-time meters much more attractive.
Low maintenance: There are no blades to wear out or bearings to replace as in turbine meters, nor are there electrodes that can foul over time as in magnetic flow meters.
IV. PIPE SPECIFICATION
| Size | DN15 | DN20 | DN25 | DN32 | DN40 | DN50 |
| Nominal Pipe Diameter Size | 15mm | 20mm | 25mm | 32mm | 40mm | 50mm |
| Pipe OD | 20mm | 25mm | 32mm | 40mm | 50mm | 63mm |
| Pipe ID | 15mm | 19mm | 26mm | 33mm | 43mm | 55mm |
| Inch | 1/2’’ | 3/4’’ | 1’’ | 1.2’’ | 1.5’’ | 2’’ |
V. COMPONENT PARTS
VI. Application
