Frictional Pressure Drop and Liquid Holdup of Churn Flow in Vertical Pipes with Different Viscosities

Table 2

Measurement parameters of different sensors.

Sensor	Range	Uncertainty
Pressure	0~1 MPa	±0.1%
Liquid flow rate	1~500 m^3/d	±0.3%
Gas flow rate	2500~50000 m^3/d	±1%