Quick Details

  • Place of Origin: Fujian, China (Mainland)
  • Brand Name: Rixin
  • Model Number: SBL
  • lead time: 10 days

Packaging & Delivery

Packaging Details: 1 piece/carton box
Delivery Detail: 15 days after purchase order


crude oil flow meter
1.LCD display,remote:4~20mA,RS485,pulse or HART
3.no moving part,no zero dirft

crude oil flow meter

Product features:
  1. · accurate measurement of flow of fluid media such as liquid, gas, steam and viscous media etc. under various normal temperature, high temperature and low temperature operating conditions;
  2. · extremely high sensitivity capable of measurement of ultra small flow (minimum flow that can be measured is 0.08m/s;
  3. · no movable part, hence high safety and reliability;
  4. · high measurement accuracy and precision (reaching 0.2% for measurement of total quantity);
  5. · wide measurement range (reaching 1:30);
  6. · good repeatability (normally 0.1~0.08%) and fast measurement;
  7. · small pressure loss, only about 1/2P of standard orifice;
  8. · dry calibration can be used, i.e. poise hanging method;
  9. · target plate can be replaced as required to change flow measurement range;
  10. · capable of online direct reading and remote transmission/signaling;
  11. · easy installation and very easy maintenance.
  12.  Anti-interfere, anti-acid, anti-alkaline,anti-impurity

II. Structure and operating principle

1) Structure

SBL flowmeter mainly consists of measurement tube (casing), stress element (target plate), sensing elements (force transducer, pressure transducer and temperature transducer), transition part (adjusted according to temperature and pressure), and accumulation calculation, display and output part. Refer to the following figure for the structure:


Operating principle

Refer to Fig.1 for operation schematic of model SBL target flowmeter with digital display. The stress element (target plate) is placed at center of measurement tube (instrument body) coaxially, with rigid connection with transducers. When measured medium flows at certain velocity (m/s), this medium has certain momentum that directly acts on the stress element (target plate). Due to rigid connection between stress element and transducer, the transducer is subject to direct force F generated by fluid momentum. This force is related to flow velocity V, medium density ρ and area of target subject A to force as follows: 

In which:

F——force on target plate

CD——resistance coefficient

P——fluid density, kg/m3

V——fluid velocity, m/s

A——area of target plate subject to force, m2

Through derivation and conversion, the flow is calculated as follows :

In which

Qm, QV-----mass flow and volume flow respectively (kg/h, m3/h)

α----flow coefficient

D----inner diameter of measurement tube, mm

β----diameter ratio, β=d/D

d----target plate diameter, mm

Other symbols are the same before.

Force on target plate is converted to electric signal by the force transducer. This signal is amplified by pre-amplification and processed by AD conversion and computer, to provide corresponding flow and total quantity. Operating principle is shown as follows:

 Table of main technical indices   


Measured media

Liquid  Gas   Steam

Nominal diameter

Pipeline type 15~300mm

Clamped mounting type 15~600mm

Inserted type 100~2000mm

Nominal pressure




Media temperature

-20°C~70°C (normal temperature type) -196°C~+450°C (high/low temperature type)







Range degree




1:100 (gas)

1:15 (steam)

Compensation type

Temperature compensation; pressure compensation



Power supply

Built-in 3.6V Li batter; external power supply of 24VDC; 220VAC (only for separate digitron)

Output forms

Site display reading; 4~20mA (2-wire system); pulse; 0~10V; RS232/RS485 (optional)

Material of measurement tube

Carbon steel; 304; 316L; also supplied to user requirement

Explosion-proof sign

Intrinsically safe type (ExiallCT4); Explosion isolating type (ExidllCT4)

Protection class

IP65; IP67


Note: Size of flowmeter flange shall execute GB/T9115.1~9115.4-2000 series standard. For pipeline type, small diameter flowmeter of DN6, DN8, DN10 etc. can be manufactured to user requirements 

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