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Model Number
4278
* 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)
Dimensions and Weight
Model
Height
4278
9.45" (240 mm)
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.
Table showing kinematic viscosity (cSt) of different mineral oils at specific temperatures
ISO 15, 22, 32, 46 and 68 based on typical figures for the Esso Nuto range of
HM oils. ISO 37 based on Shell Tellus HM oil.
4
Flow Range
2.5 - 100 gpm
(10 - 400 lpm)
41 - 104°F (5 to 40°C)
Hydraulic oil
32 - 250°F (0 to 120°C)
± 1% of full scale.
± 1.6% of full scale.
± 2°F, 1°C.
Painted mild steel
High tensile aluminum
FKM
Width
7.87" (200 mm)
Temp °C
ISO15
ISO22
0
85.9
165.6
10
49.0
20
30.4
30
20.1
40
14.0
50
10.2
60
7.7
70
6.0
80
4.8
90
4.0
100
3.3
Specification
Pressure Range
0 - 6000 psi
(0 - 420 bar)
Depth
7.87" (200 mm)
Fluid viscosity
Fluid type
ISO32
ISO37
309.3
449.9
87.0
150.8
204.7
50.5
82.2
105.5
31.6
48.8
59.8
21.0
31.0
36.6
14.7
20.8
23.9
10.7
14.7
16.5
8.1
10.9
12.0
6.4
8.4
9.1
5.2
6.6
7.2
4.3
5.5
6.0
Inlet/Outlet Ports
1-5/16" -12UN #16 SAE ORB
Weight
14.33 lbs (6.5 kg)
ISO46
ISO68
527.6
894.3
244.9
393.3
127.9
196.1
73.1
107.7
44.9
63.9
29.4
40.5
20.2
27.2
14.6
19.2
11.1
14.3
8.7
11.1
7.1
8.9
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