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Measured variable
Measuring range
4
Input
• Mass flow (proportional to the phase difference between two sensors mounted on the measuring
tube to register a phase shift in the oscillation)
• Volume flow (calculated from mass flow and fluid density. The density is proportional to the
resonance frequency of the measuring tubes).
• Measuring tube temperature (by temperature sensors) for calculatory compensation of temperature
effects.
Measuring ranges for liquids
DN
[mm]
[in]
8
³⁄₈
15
½
25
1
40
1 ½
50
2
80
3
Measuring ranges for gases
The full scale values depend on the density of the gas. Use the formula below to calculate the full scale
values:
=
· ρ
÷ x [kg/m³]
max(G)
max(F)
(G)
= max. full scale value for gas [kg/h]
max(G)
= max. full scale value for liquid [kg/h]
max(F)
ρ
= Gas density in [kg/m³] at operating conditions
(G)
DN
[mm]
[in]
8
³⁄₈
15
½
25
1
40
1 ½
50
2
80
3
Here,
can never be greater than
max(G)
Calculation example for gas:
• Sensor type: Promass E, DN 50
• Gas: air with a density of 60.3 kg/m³ (at 20 °C and 50 bar)
• Measuring range (liquid): 70000 kg/h
• x = 125 (for Promass E DN 50)
Max. possible full scale value:
=
· ρ
÷ x [kg/m³] = 70000 kg/h · 60.3 kg/m³ ÷ 125 kg/m³ = 33800 kg/h
max(G)
max(F)
(G)
Recommended full scale values
See information in the "Limiting flow" section → 17
Range for full scale values (liquids)
[kg/h]
0 to 2000
0 to 6500
0 to 18000
0 to 45000
0 to 70000
0 to 180000
x
85
110
125
125
125
155
max(F)
Proline Promass 40E
to
min(F)
max(F)
[lb/min]
0 to 73.50
0 to 238.9
0 to 661.5
0 to 1654
0 to 2573
0 to 6615
Endress+Hauser
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