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MODEL
NUMBER
4278A
per J518 SAE Code 61 standard
Ambient temperature:
Fluid type:
Fluid temperature:
Flow Accuracy:
Pressure Accuracy:
Temperature Accuracy:
Construction materials
Case:
Flow block:
Seals:
Battery Details
PP3 9 volt Alkaline (IEC6LR61, ANSI/NEDA 1604A)
Flow Measuring Range:
The display shows 0.0 when the turbine has stopped rotating. Below the lowest calibrated
flow point the accuracy of the measurement is not guaranteed.
If the flow exceeds +5% of the maximum measuring range the display will show
Dimensions and Weight
MODEL NUMBER
UNITS
4278A
The performance of a turbine flow meter can be affected by the viscosity of the fluid measured.
Our turbine flow meters are calibrated at between 18 and 26 cSt as standard (a mean viscosity
of 21 cSt), which is the typical kinematic viscosity for a hydraulic fluid operating at 50 °C. The
kinematic viscosity of all hydraulic fluids is related to the fluid temperature and the table below
shows the affect of temperature on the kinematic viscosity of a range of typical grades of
hydraulic oil.
The shaded area of the table shows the range of viscosities that can be measured by a flow
meter with standard calibration with minimal effect on the accuracy (less that ± 1% FS).
Flow meters can be specially calibrated at a different viscosity to the standard or we can advise
on the expected error when the flow meter is used at other viscosities, please contact sales
for further information.
4
Specification
FLOW RANGE
PRESSURE RANGE
gpm
lpm
2.5 - 100
10 - 400
0 - 6000
14 - 122°F (-10 to 50°C)
Hydraulic oil
-13 - 257°F (-25 to 125°C)
± 1% of full scale.
± 1.6% of full scale.
± 2°F, 1°C.
Painted mild steel
High tensile aluminum
FKM
HEIGHT
mm
in
202
7.95
Fluid viscosity
psi
bar
0 - 420
1-5/16˝ -12UN #16 SAE ORB
WIDTH
DEPTH
mm
in
mm
222
8.74
181
INLET/OUTLET PORTS
HI
.
WEIGHT
in
kg
7.13
6.5
14
lb
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