Externally attached ultrasonic flowmeter

Name Externally attached ultrasonic flowmeter
Brand Zysmart water meter
Model ZYLXUW-1
Inventory 1000

一、Product Summary

Dear users, thank you for using our company's external ultrasonic flowmeter. Please read this instruction manual carefully before using it, so that you can easily use our products.

The water meter adopts the unique ultrasonic propagation phase and time difference measurement technology newly developed by the company, and has the remarkable characteristics of high precision, low power consumption, wide measuring range ratio, stability and reliability, etc.

In the structure, the IP68 scheme of components is adopted, i.e. each component reaches the IP68 protection level, and the instrument cavity can ensure long-term operation even if water enters.


二、Working Principle


When ultrasonic waves propagate in flowing fluid, they carry the information of fluid flow rate, and the flow rate of fluid can be detected by the received ultrasonic waves, which can be converted into flow rate. Ultrasonic pulses pass through the pipeline from one sensor to another to achieve the purpose of measurement.


三、Function List


Serial Number




Metering function

Ultrasonic acquisition


Water metering data history storage local

1. For the latest 90 days, the measurement data is stored every hour

2. The latest 180 days, the measurement data is stored every day

3. Monthly storage of measurement data in the latest year


Power supply

1. External power supply


LED indication

Communication Event


Manual triggering (triggering varies according to different models)

Button triggers an escalation event

Trigger 2 seconds to report data

Trigger more than 9 seconds to restart the device


Wireless technology



External Interface



Periodic reporting

1 The default period is 24 hours

Latest cumulative measurement data

Downlink Signal Strength Indication


Timed reporting

1 Fixed time (for example, 23:00, also configurable) triggers metering data reports every day, and the message payload is the same as the periodic report

Latest cumulative measurement data

Water meter status: valve status/power supply

Uplink Signal Strength Indicator RSSI/SNR


Antenna (GPRS)

Built-in antenna (spring/soft antenna)

External antenna (chuck antenna)

Communication module

Communication mode

Supported Band

RS485 communication

See board for details of A and B

EC25 (4G)

Support MQTT communication


Support MQTT communication


四、Performance characteristics


Small size, convenient carrying, full function and accurate measurement. It can be used for production detection, flow calibration, temporary detection, flow inspection, water balance debugging and energy-saving detection, and is a necessary tool and instrument for instant flow detection.


五、Technical Parameters



± 1%

Flow rate range

0 ~ ± 10 m/s, forward and reverse flow

Pipe diameter

DN15 ~ DN6000

Fluid temperature

-30 ~ 160

Type of fluid

Water, seawater, sewage, acid and alkali liquor, alcohol, beer, various oils and other single uniform liquids that can conduct ultrasonic waves

Pipe material

Steel, stainless steel, cast iron, copper, PVC, aluminum, glass fiber reinforced plastic and other dense pipes are allowed to be lined

Signal Output

1 4-20mA Current Output, 0-1K Impedance, 0.1% Accuracy

1 channel OCT pulse output pulse width 6-1000ms

1 Relay Output

Signal Input

1 4-20mA current input, which can be used as a data collector connected with a three-wire PT100 platinum resistor to realize heat measurement

Communication Interface

Isolated RS485 serial interface supports MODBUS protocol

Data storage

SD card regularly stores set parameters and measurement results (optional)

Power supply mode

DC8-36V or AC85-264V


六、Product structure and size

technical parameter
Accuracy ± 1%
Flow rate range 0 ~ ± 10 m/s, forward and reverse flow
Pipe diameter DN15 ~ DN6000
Fluid temperature -30 ℃ ~ 160 ℃
Communication Interface Isolated RS485 serial interface supports MODBUS protocol