SI-3402 Portable Ultrasonic Flow Meter

SI-3402 portable ultrasonic flow meter realizes the non-contact measurement. It is ideal for flow surveys and closed-pipe application where non-invasive measurement of Liquids is required.
Temperature and heat can also be measured by connecting clamp on temperature transducer.
Widely be used in water supply, heat supply, chemical industry, machinery and energy resources.
DiameterDN15~ DN6000
Temp. range-30~160°C

Data Record

Thermal printer,external SD card (2G of capacity)
Flow rate0~±10m/s
Liquid typehot water, chilled water, city water, sea water, waste water, Sewage with small particle content;crude oil, lubricating oil, diesel oil, fuel oil, Chemicals (alcohol, etc. ) ; Plant effluent; Beverage; Ultra-pure liquids, etc.
  • High Accuracy: 1%.
  • Wide measuring range
  • Several types transducer for selection, pipe size from Dn15mm to Dn6000mm.
  • Large capacity battery
  • Built-in rechargeable Ni-MH battery, provide over 12 hours of continuous operation.
  • Built-in printer
  • Available to print data in real time, also available to timed print over 20 pre-set measuring results
  • Data storage
  • Store over 20 pre-set measuring results to SD card, make it easy to data analysis and statistics.
  • RS 485 communication interface
  • Upload the parameters and measuring results to computer.
  • Various input and output signal
  • Output signal:4-20mA,pulse signal, relay signal;
  • Input signal:3way 4-20mA.


ItemsPerformance & Parameter
ConvertorPrincipleTransit- time ultrasonic flowmeter
Display2×20 character LCD with backlight, support the language of Chinese, English and Italy
Signal Output1 way 4-20mA output,electric resistance 0~1K,accuracy 0.1%
1 way OCT pulse output (Pulse width 6~1000ms,the default value is 200ms)
1 way relay output
Signal Input3 way 4-20mA input,accAuracy 0.1%,acquire signals such as temperature,press and liquid level
Achieve to heat maesurement by connecting the temperature transducer PT100
Data InterfaceInsulate RS485 serial interface,upgrade the flowmeter software by computer,support MODBUS
Data RecordThermal printer,external SD card (2G of capacity)
Pipe Installation ConditionPipe MaterialSteel, Stainless steel, Cast iron, Copper, Cement pipe, PVC, Aluminum, Glass steel product, liner is allowed
Pipe Diameter15~ 6000mm
Straight PipeTransducer installation should be satisfied: upstream10D, downstream 5D, 30D from the pump
Measuring MediumType of LiquidSingle liquid can transmit sound wave,such as Water (hot water, chilled water, city water, sea water, waste water, etc.); Sewage with small particle content; Oil (crude oil, lubricating oil, diesel oil, fuel oil, etc.);Chemicals (alcohol, etc. ) ; Plant effluent; Beverage; Ultra-pure liquids, etc.
TurbidityLess  than 10000ppm and less bubble
Working EnvironmentTemperatureConvertor:-20~60C; Flow Transducer:-30~ 160C
HumidityConvertor: 85%RH; Flow Transducer:IP67
Power Supply8 built-in Ni-MH batteries 1.2V(for over 20 hours of operation).90V-260VAC adapter
Power Consumption1.5W

Optional Transducers

Optional Transducers

Optional temperature transducers

Optional temperature transducers


 transducerCable lengthHeat MeasuremenInput Signal
SI-3402-□mN No heat measurementN no output
 TS5×21 Heat measurement1 4-20mA output

Example: SI-3402-HS,HM,TL-5-N-N


Explanation: portable ultrasonic flow meter+ small size mounting bracket transducer+ medium size mounting bracket transducer + large size clamp on transducer+2×5M cable ,no heat measurement, no 4-20mA signal output

Power Stations
  • Circulating water/service water
  • District heating networks
  • Pump protection
  • Condensate, feed water, and light oil measurement
  • Thermal power plant
  • Heating companies
  • Energy conservation and emission reduction
Water and Waste Water Management
  • Sewage treatment plant
  • Drinking water networks, verification of water meters
  • Pump protection
  • Distribution and consumption metering
  • Leak detection
Building Services
  • Engineering
  • Hot and cold water
  • Cooling systems and air-conditioning units
  • Hydraulic compensation
  • Pump control and setup
  • Optimization of heating systems
Chemicals and Petrochemicals
  • Crude and light oil
  • Industrial and Waste Water
  • Aggressive and toxic fluid
  • Measurement of heat carriers, (thermal oils)
Food and Beverage Industry
  • Hygienic, reliable measurement of fluid
  • Dosage measurements
  • Cleaning solutions
  • Water
  • Beverages

Techincal Support

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