Verabar Flow Sensor

Verabar flow sensor’s advantages: Light weight, easy installation and maintenance,  small pressure loss, etc. It is especially suitable for the application in the measurement of largemouth runoff.

Product Description

Working principle

When the fluid passes the verabar flow sensor, the upstream of the flow sensor will produce a high pressure distribution zone where the pressure is slightly higher than the static pressure of the pipeline. According to Bernoulli equation, the flow velocity will quicken when flowing through the verabar flow sensor, the downstream of the flow sensor will produce a low pressure distribution zone where the pressure is slightly lower than the static pressure of the pipeline. The downstream of the flow sensor will produce some vaccum when the fluid passes the flow sensor, the two sides of the flow sensor will appear swirls, the cross-section shape, surface roughness of averaging pitot-tube and the location of the low pressure tapping are critical factors. The stability and accuracy of low pressure signal depends on averaging pitot-tube’s accuracy and performance. The multiple pairs of pressure tapping holes on the verabar flow probe are distributed at high pressure zone and low pressure zone according to the certain rule, which can accurately detect the average differential pressure so that the flow velocity is measured accurately. 


The design features of verabar flow probe

The cross-sectional shape of verabar flow probe likes bullet (see figure 1), which can produce accurate pressure distribution and a stable fluid separation point. The low pressure tapping holes can produce stable differential pressure signal, and are intrinsic anti-blocking. The integrated structure can avoid signal leakage, in favour of keeping high accuracy in long term.

verabar 6


Product performance

● Accuracy: ± 1%
● Applicable pressure rating: 0 ~ 40 Mpa
● Applicable temperature: -50 ~ 550℃
● Max Range: depending on the flow probe’s strength
● Minimum Range : depending on the minimum pressure difference
> minimum pressure difference for gas: 25 pa;
> minimum pressure difference for liquid: 250 pa;
> minimum pressure difference for steam: 380 pa;
● Range ratio: > 10 : 1
● Applicable pipe size: DN50 ~ DN5000 mm ( Circular pipeline, Rectangular pipeline )
● Applicable process condition: fully filled with fluid, flow in one direction
The viscosity of the fluid (gas, steam or liquid): ≤10 Cp.


Structure diagram of commonly used verabar flow sensor
Insertion type, Model:  HGVB-500 Insertion type, Model:  HGVB-510
verabar 7 verabar 8


Diagram of straight pipe length at upstream / downstream as follow

verabar 9




Answer : Please send your question or enquiry to our email:, we will forward the questions to the related engineer.

Answer :  Please communicate with the sales about the return procedure before returning product.

Answer :  The delivery time depends on the order quantity and product specification.  If the product’s specification is conventional ( not special ),  delivery time is 5 or 7 working days for order quantity ≤ 10 pieces;  delivery time is 2 or 3 working weeks for order quantity 15 ~ 30 pieces. 

Answer :  by Courier,  by Sea or by Air

Answer :  Yes,  Generally warranty is one year.

Answer :  From year 2015  to year 2021,  average annual sales is RMB 350 million ( about USD 54.7 million )

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