The LA Gear Flow meter uses a pair of meshing gears as a rotor to measure flow. The gears and cavity form a fixed standard volume through which the fluid must pass. The number of times the standard volume is filled within a given period of time is used to calculate the flow rate. It is suitable for measuring high viscosity fluids up to 10,000 Pa·s but not fluids containing solids. The gear flowmeter provides accurate measurement, is independent of flow conditions, and has a small volume, light weight, and produces little vibration or noise.

1. LA Gear Flow meter
（Circular gear flowmeter）
The working principle and structure
Flow meter cavity has a pair of meshing gears as the rotor, the two gear and the cavity are
respectively composed of a fixed volume, called the standard volume, flow is through the
computation within a certain period of time to flow through the standard volume of the number
of measurement.
Structure Principle
Feature
Independent of flow state - and fluid flow measurement;
Medium - viscosity heals big, amount of leakage leak out from gear and measurement of spatial gap is smaller, so
the measured medium viscosity is bigger, the leakage error you smaller, more favorable for measurement.
The gear flowmeter measurement accuracy, suitable for high viscosity medium flow and measurement, fluid but
not suitable for containing solid particles, the need to install filters. If the medium mixed with gas, will cause
measurement errors.
The small volume, light weight, running vibration and noise of small, fluid viscosity can be measured up to
10000pa.s. Measurement accuracy is 0.5 grade, 0.2 grade. Wide measuring range up to 50:1
Technical
paramete
rs
Model
Flowrate m
3
/h
Pressure
mpa
Mater
ial
Connec
tion
viscosity
Pa.s
Temperat
ure
℃
0.5 grade 0.2 grade

2. LAⅠ 0.010～0.50 0.05～0.25 1.6
2.5
4.0
6.3
10.0
25
42
Carbo
n
steel
304
316
Thread
Or
flange
0 ～
10000
0～200LAⅡ 0.020～1.00 0.080～0.60
LAⅢ 0.050～2.00 0.20～1.0
Working Condition
Temperature-20℃～+50℃ humidity
5%～95% air pressure 85kpa～106kpa
Electrical Specifications
1. Power supply：input power 3.6VBattery，Power＜1mw；Power supply12VDC～24VDC,Power
＜2w；
2. Output：pulse、4-20mA、RS485Mudbus 、Hart,etc；
Install
Any direction、no need straight pipe。If there is any impurities，filter is needed
boundary dimension
Model
a(mm) b(mm)
LAⅠ 88 72
LAⅡ 88 72
LAⅢ 120 95
Model
1 2 3 4
Description
Counter Pressure Material Accuracy
LA Circular gear flow meter
Ⅰ Ⅰ
Ⅱ Ⅱ
Ⅲ Ⅲ
1.6～42 Pressure 1.6～42mpa
C304 Rotator 304SS
C316 Rotator 316SS
0.5 0.5 grade
0.2 0.2 grade