Ultrasonic flow meter for low flow rates of water-like liquids

  • Interference free operation
  • Long life cycle, no moving parts
  • Insensitive to pressure peaks and particles in the fluid
  • Wide independence to the inlet and outlet pipe diameters
  • Analog (4..20 mA) and pulse output signals

Ultrasonic flow meters for low flow rates of water-like liquids

SONIC-VIEW SVM-110 is an ultrasonic flow meter for water and aqueous solutions. The compact, non-obstructive instrument operates on the basis of two ultrasonic transducers, mounted on the outer surface of a straight, stainless steel tube. The flow meter does not contain any moving parts, causes virtually no pressure loss and can be mounted in any position, requiring no straight inlet or outlet runs. Its sensor housing is IP54 protected.

The in-line ultrasonic flow meter has a nominal size of DN20 for flow rates of 5…110 l/min and is suited for operating pressures up to 16 bar(g). The instrument allows frequency and analog output proportional to the flow and features an additional alarm output. The alarm status is indicated by an LED and the alarm level can easily be adjusted by means of a rotary switch on the front cover.

Technical specifications



10...110 l/min ± 4% RD
5...10 l/min ± 10% RD


1:22 (4,5...100%)

Signal output starting from

2 l/min

Max. flow rate

140 l/min

Flow / alarm indication

LED green / red


Water and aqueous solutions


1% FS

Operating temperature



Any position, attitude insensitive


Mechanical parts

Material (wetted parts)

Process connection : stainless steel 1.4404
Measuring pipe : stainless steel 1.4404


Aluminium casting

Ingress protection (housing)




Process connections (welded)

1“ BSP male thread

Seals (internal)


Nominal pressure



Electrical properties

Power supply

+10…30 Vdc

Current consumption

Max. 80 mA

Analog output signal

4...20 mA  NAMUR NE43 compliant,  
max. burden = (+U - 10V)/23 mA

Alarm output signal

- Alarm in case of lack of flow or air in the pipe
- PNP open collector, max. 100 mA short-circuit-proof
- 16 different setpoints selectable with rotary switch

Frequency output

   Pulse rate / K-factor
   Signal shape
   Signal current
   Max. pull-up voltage


200 pulses/l
5 ml/pulse
Square wave signal PNP open collector
Max. 100 mA, short-circuit-proof
30 Vdc

Electrical protection measures

Short-circuit proof (up to 30 V) and  
polarity protection (up to -30 V)

Electrical connection

5 pin plug connector M12x1