Technical data
Note:
❑ The measuring procedure necessitates a homogeneous distribution of sub-
stances/mixture. Varying mixtures can only be detected by higher-order systems.
The particle size of class 2 media must not exceed 2 mm.
Medium: Med
Flow velocity: V
Temperature differential: 
Mass: m
Specific heat: c
Density: 
Assignment table - Medium / Flow velocity / Temperature differential
Class/Medium Chemical V [m/s]  [°C]  [g/dm
3
] c [cal/g °C]
symbol 0 °C,  20 °C,
1 bar/14.7 PSI 1 bar/14.7 PSI
Class 1
a: air 25 10.5 1.293 0.24
oxygen O2 25 10.5 1.429 0.219
nitrogen N2 25 10.5 1.25 0.249
nitro oxide NO 25 10.5 1.34 0.237
carbon monoxide CO 25 10.5 1.25 0.249
deuterium 25 10.5 0.1798 1.731
fluorine F2 25 10.5 1.696 0.197
hydrogen H2 25 10.5 0.08991 3.42
hydrogen bromide HBr 25 10.5 3.646 0.086
hydrogen chloride HCl 25 10.5 1.639 0.191
hydrogen fluoride HF 25 10.5 0.8926 0.348
hydrogen iodide HI 25 10.5 5.799 0.054
Class 2: We currently don’t have much experience with the use of such media, but generally 
the FC01-Ex can certainly be used.
Class 3 4 °C 20 °C
a: tap water 3 3.3 1 1
high-purity water 3 3.3 1 1
seawater 3 3.3 1.03 1
b: water glycol 3 3.5
(1:1 … 2.5:1)
Flow Meter FC01-Ex Flow Meter FC01-Ex
26 Technical implementation of customer calibration 26 Technical implementation of customer calibration
Note:
❑ The measuring procedure necessitates a homogeneous distribution of sub-
stances/mixture. Varying mixtures can only be detected by higher-order systems.
The particle size of class 2 media must not exceed 2 mm.
Medium: Med
Flow velocity: V
Temperature differential: 
Mass: m
Specific heat: c
Density: 
Assignment table - Medium / Flow velocity / Temperature differential
Class/Medium Chemical V [m/s]  [°C]  [g/dm
3
] c [cal/g °C]
symbol 0 °C,  20 °C,
1 bar/14.7 PSI 1 bar/14.7 PSI
Class 1
a: air 25 10.5 1.293 0.24
oxygen O2 25 10.5 1.429 0.219
nitrogen N2 25 10.5 1.25 0.249
nitro oxide NO 25 10.5 1.34 0.237
carbon monoxide CO 25 10.5 1.25 0.249
deuterium 25 10.5 0.1798 1.731
fluorine F2 25 10.5 1.696 0.197
hydrogen H2 25 10.5 0.08991 3.42
hydrogen bromide HBr 25 10.5 3.646 0.086
hydrogen chloride HCl 25 10.5 1.639 0.191
hydrogen fluoride HF 25 10.5 0.8926 0.348
hydrogen iodide HI 25 10.5 5.799 0.054
Class 2: We currently don’t have much experience with the use of such media, but generally 
the FC01-Ex can certainly be used.
Class 3 4 °C 20 °C
a: tap water 3 3.3 1 1
high-purity water 3 3.3 1 1
seawater 3 3.3 1.03 1
b: water glycol 3 3.5
(1:1 … 2.5:1)










