MEJ-FSD300 Ultrasonic Doppler Flow Meter

MEJ-FSD300 Ultrasonic Doppler Flow Meter is based on the Doppler effect and uses the principle of sound wave reflection to carry out measurement work. During operation, its ultrasonic transmitter serves as a fixed sound source, emitting specific frequency sound waves towards the fluid.

When sound waves touch two-phase media such as solid particles and bubbles in a fluid, they are reflected back to the receiver. According to the Doppler shift equation, the measurement value can be accurately calculated.

High measurement accuracy:

The velocity measurement accuracy of MEJ-FSD300 Ultrasonic Doppler Flow Meter can reach 1.0% ± 0.01m/s, the liquid level accuracy can reach 0.2% ± 0.01m, and the temperature accuracy is ± 1 ℃. It can provide reliable data support for various scenarios with strict flow data requirements, such as precise scheduling of water conservancy projects and fine control of flow ratio in industrial production. ​

Wide range coverage:

The flow rate of MEJ-FSD300 Ultrasonic Doppler Flow Meter can be measured in both directions (-10~10) m/s, the liquid level measurement range is (0~10) m, and the temperature measurement range is (-5~60) ° C. Whether it is turbulent water flow, deep liquid level, or fluid in complex temperature environments, it can easily handle and adapt to various working conditions. ​

Excellent resolution:

The flow velocity resolution reaches 1mm/s, and the liquid level resolution is 1mm, which can sensitively capture extremely subtle changes in fluid flow velocity and liquid level. In scenarios that require close monitoring of small fluctuations in flow rate, such as laboratory precise flow control and ecological water micro environment flow monitoring, the advantages are fully demonstrated. ​

Fast response speed:

the flow information can be quickly fed back within 10s to 60s (the smoothness coefficient can be set through the communication protocol), and the latest data can be quickly provided for applications that need to master the flow dynamics in real time and make adjustments in time, such as the rapid response of urban drainage system to flow sudden changes during rainstorm, real-time flow regulation in industrial automated production lines and other scenarios. ​

Non contact measurement:

The measurement point of MEJ-FSD300 Ultrasonic Doppler Flow Meter is located in front of the instrument, without damaging the flow field, avoiding interference with the normal flow state of the fluid, and reducing the wear and corrosion problems caused by direct contact with the fluid, extending the service life of the equipment. It is suitable for measuring various complex and special fluids. ​

Strong environmental adaptability:

There are no rotating parts inside, so there is no need to worry about being entangled or blocked by water, grass, mud, etc., and the probe is sturdy and durable. In harsh environments such as lush irrigation channels, rivers with high sediment content, and cold ice ages, it can still operate stably and continuously provide accurate measurement data. ​

High protection level:

reaching IP68 protection level, it can adapt to various harsh natural environments and complex industrial environments. Whether immersed in water for a long time or facing dusty, humid and other environments, it can work normally, ensuring the stability and continuity of measurement. ​

Easy installation and maintenance:

The installation process of MEJ-FSD300 Ultrasonic Doppler Flow Meter is relatively simple, reducing installation costs and difficulties; Daily maintenance work is easy, reducing the manpower, material resources, and time costs required for maintenance, lowering equipment downtime, and improving overall operational efficiency.

Product	Ultrasonic Doppler Flow Meter
Model	MEJ-FSD300
Parameter
Measured variable	Flow rate,liquid,temperature
Measuring range	Bidirectional flow but no identification of flow direction, absolute value of flow rate flow rate	Flow rate: (0~10) m/s                       Liquid level: (0~10) m
	Bidirectional flow and identification of flow direction, flow rate flow with plus or minus sign	Flow rate: (-10~10) m/s Liquid level: (0~10) m
	Temperature	(-5～60)°C
Accuracy	Flow rate: 1.0%±0.01m/s Liquid level: 0.2%±0.01m Temperature: ±1℃
Resolution	Flow rate: 1mm/s Liquid level: 1mm
Response time	10s～60s Note: Set the smoothing coefficient through the communication protocol, the larger the value the faster the response of smoothing flow rate.
Operating frequency	2MHz
Firing power	1W
Protection level	IP68
Output
Transformer output	Output type	(4~20)mA（0~5)V
	Output accuracy	0.5% F.S
	Output load	250Ω
Communication output	Output type	RS485
	Communication specification	MODBUS
Relay output	Relay type	Dual SPDT / Dual SPDT+Dual SPST
Power supply
Power supply	AC: 220V DC: 24V
Power consumption	≤4W
Over-voltage protection	36V
Electrical interface	M20*1.5 cable plugs
Process conditions
Type of waterway	Pipelines, channels, natural streams, rivers
Measured medium	pH value between 6 and 8, non-corrosive to the sensor
Medium temperature	(0～60)°C
Environmental conditions
Ambient temperature	(0～60)°C
Storage temperature	(-20～60)°C

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