Model F8 Ultrasonic Flow Meter with 4-20mA / RS485 / OCT
I INTRODUCTION
The energy meter ML-E8 is specially designed for central air
conditioning systems to do cooling and heating measurement.It could
measure and charge for cooling and heating.
The energy consumed by the user is calculated by measuring the
temperature and flow rate of the chilled water (or hot water)
flowing through the pipe.Install an energy meter ML-E8 on the
user's inlet pipe and install a temperature sensor on each of the
inlet and outlet pipes. The energy is calculated by metering the
amount of chilled water (or hot water) flowing through the pipe
(ie, the flow rate and pipe size), and the temperature difference
between the incoming and return water.
- Clamp on type, no need to cut the pipe or do any other changes.
- No professional product knowledge required, installation and
measurement can be done based on the guide.
- No moving parts or pressure changes involved, installation can be
done without stop provide.
II. SPECIFICATION
| Model | ML-E8 |
| Velocity Range | 0.1 m/s ~ 5.0 m/s |
| Accuracy | ± 2.0% |
| Repeatability | 0.80% |
| Pipe Size | DN15,DN20,DN25,DN32,DN40,DN50,DN65,DN80 |
| 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, (MODBUS or MeterBUS for option) |
| 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℃ |
| RTD Measuring Temp. | 2℃-105℃ |
| Medium Temp. | 0℃-50℃ |
| Environment Humidity | 0-95% relative humidity, without condensation |
| IP Grade | IP54 |
III. 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.
Why choose ultrasonic?
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.
III. DIMENSION
| Size | A | B | C | D(mm) |
| (mm) | (mm) | (mm) | Min | Max |
| DN15 | 25 | 8 | 58 | 1.5/φ20 | 8/φ23 |
| DN20 | 25 | 15 | 58 | 1.5/φ25 | 4.5/φ28 |
| DN25 | 28.5 | 18.5 | 58 | 1.5/φ32 | 4.5/φ35 |
| DN32 | 29.5 | 24 | 68 | 1.5/φ38 | 8.5/φ45 |
| DN40 | 36 | 27 | 78 | 1.5/φ48 | 7.5/φ54 |
| DN50 | 41 | 32 | 91 | 1.5/φ58 | 7.5/φ64 |
| DN65 | 44.5 | 35.5 | 102 | 1.5/φ65 | 11.5/φ75 |
| DN80 | | | | 1.5/φ76 | 11.5/φ86 |
IV. Company Profile
Melan Measurement & Control Instruments is located in Shanghai
City. It is a high-tech manufacturer specialized in the design,
development, manufacturing and sale of measurement and control
instruments.
Our products are widely used in various fields, including
electricity, chemical industry, metallurgy, brewing, oil and gas,
textile, water conservancy, environmential protection, etc.
We own independent-courtyard modemized manufacturing workshops and
an open office building. Melan has accumlated production and
management experience in instruments from European and American and
domestic famous companies.
We own first-class talent team, and all the products have reached
advanced level at home and abroad. We provide our customers with
complete and professional test control solutions and high-tech and
high-quality products.
Melan is your reliable friend and partner. We are willing to try
our best as dedication and perfection as motivation.
V. FAQ
Q: How long will you give me the reply?
A: We will contact you in 5 hours as soon as we can.
Q: What is the warranty of your prducts?
A: Our warranty is 12 months after the shipping date.
Q: What is the lead time of your products?
A: Normally our factory lead time is 10-12 working days.
Q: Can I OEM your products?
A: OEM and ODM customization are welcomed.
Q: What is your MOQ?
A: We have no MOQ limit, small quantity order is acceptable.
Q:What is the transport?
A: Express such as DHL, FedEx, UPS for freight prepaid, and we can
also use your own courier account to do the freight collect. For
more goods we can arrange by air or by sea.
