Proline Promass O 300
10
Hauser
Input
Measured variable
Direct measured variables
• Mass flow
• Density
• Temperature
Calculated measured variables
• Volume flow
• Corrected volume flow
• Reference density
Measuring range
Measuring range for liquids
DN
Measuring range full scale values
min(F)
to
max(F)
[mm]
[in]
[kg/h]
[lb/min]
80
3
0 to 180
000
0 to 6
615
100
4
0 to 350
000
0 to 12
860
150
6
0 to 800
000
0 to 29
400
250
10
0 to 2
200
000
0 to 80
850
Measuring range for gases
The full scale value depends on the density and the sound velocity of the gas used and can be
calculated with the formula below:
max(G)
= minimum (
max(F)
· ρ
G
: x ; ρ
G
· c
G
· π/2 · (d
i
)
2
· 3600)
max(G)
Maximum full scale value for gas [kg/h]
max(F)
Maximum full scale value for liquid [kg/h]
max(G)
<
max(F)
max(G)
can never be greater than
max(F)
ρ
G
Gas density in [kg/m³] at operating conditions
x
Constant dependent on nominal diameter
c
G
Sound velocity (gas) [m/s]
d
i
Measuring tube internal diameter [m]
DN
x
[mm]
[in]
[kg/m
3
]
80
3
110
100
4
130
150
6
200
250
10
200
To calculate the measuring range, use the
Applicator
sizing tool → 91
Calculation example for gas
• Sensor: Promass O, DN 80
• Gas: Air with a density of 60.3 kg/m³ (at 20 °C and 50 bar)
• Measuring range (liquid): 180
000 kg/h
• x = 130 kg/m³ (for Promass O, DN 80)
Maximum possible full scale value:
max(G)
=
max(F)
· ρ
G
: x = 180
000 kg/h · 60.3 kg/m³ : 130 kg/m³ = 83
500 kg/h
Summary of Contents for Proline Promass O 300
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